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Abstrakt: This paper presents development oj polyuretan foam simulating model. The combination of pneumatic cylinders filled by ideal gass with polytropic change of stat [...]
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Dobiáš, Ivan
Abstrakt: The S4P programme (Science for Practice) of the Engineering Academy of the Czech Republic (EACR) concentrates on new research knowledge transfer into industry a [...]
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Abstrakt: The control of motion a robot manipulator gripper and a mobile (locomotion) robot behaviour requires the solution of the direct and inverse kinematics and dynam [...]
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Abstrakt: The contribution is focused on design of multi-legged robot leg as an autonomous system. Leg is composed of the leg mechanism, 3 leg drives, sensor and control [...]
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Abstrakt: Relations between crack opening displacement (CTOD) and other fracture mechanics parameters are of a great importance in fracture mechanics. The basic aim of t [...]
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13.
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Jirouš, F.
Abstrakt: It is shown that only a system with counter-current in- and outflow (U-type flow) can lead to an even distribution in branched systems. Calculations prove that [...]
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Kocanda, Lubomír
Abstrakt: Soft impact oscillator with one degree of freedom containing soft stop is considered. Ways of the system to a chaotic motion are dealt with. Various ways to thi [...]
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Křiváková, Jarmila
Abstrakt: Článek je zaměřen na počítačové modelování stability válcových skořepin řešených dynamickou nelineární analýzou programovým souborem COSMOS/ [...]
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Abstrakt: The paper presents a determining of the real power characteristics of non axial loaded pneumatic spring, hydraulic damper, spring rubber stop-members and two-po [...]
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Abstrakt: The long-term behaviour of a crystalline rock has been modelled as a viscoplastic problem. The Perzyna type of material models, which is based on socalled overs [...]
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Abstrakt: Dynamic effects of seismic excitation and of the steam line break in the weld of the steam pipe and the steam collector during an earthquake are analyzed. Gener [...]
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Říman, Pavel
Abstrakt: The primary mechanism for traffic noise reduction in existing highways is trough the use of noise barriers. The most of present used methods calculating noise b [...]
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20.
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Rohan, E.
Abstrakt: The paper deals with the homogenization method in the context of modelling biological tissues which undergo large deformation. The updated Lagrangian scheme is [...]
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Abstrakt: The paper deals with the bone tissue modelling as a micropolar continuum. Isotropic and orthotropic constitutive relations were used for the description of the [...]
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Abstrakt: Existence of the interface between regions with different elastic properties have a pronounced influence on the behaviour of cracks The aim of the present contr [...]
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Abstrakt: The paper deals with evaluation and analyzing of stresses in rubber cylindrical specimen which was twisted up to large deformation. Ogden hyperelastic nonlinear [...]
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Šklíba, Jan
Abstrakt: This paper presents a summary of the research, focused to the dynamic problems of the driver seat, performed at the Technical university of Liberec during the l [...]
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Abstrakt: V přispěvku jsou předneseny nové poznatky o matematickém modelu nestacionárního proudění v rozvětvení tvaru T. Je zde naznačeno jeho odvození a jso [...]
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Abstrakt: In relation to previous solution of non-stationary state of stress in elastic plate excited by singular force, the solution of transversa le impact an elastic t [...]
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Abstrakt: The stepping stone in evaluating effective elastic properties of woven composite tubes is an accurate geometrical description of the composite tube on meso-scal [...]
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Zapoměl, Jaroslav
Abstrakt: Properties of fluid film bearings are significantly influenced by the shape of the cross section of the holes in the bearing shells. In computational models the [...]
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Experimental equipment for simultaneous dynamic and optical measurements on a vibrating profile with two degrees of freedom was designed and realized. One degree of freed [...]
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As in case of previous papers published on conference IM 2000, 2003 the influence of asymmetry at oscillating three-dimensional resiliently beared body, rigid plate, forc [...]
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The paper presents the latest results of modeling of the erosion effects of cavitation bubbles on the blades of a water pump. Cavitation erosion is caused by the collapse [...]
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Linear two degrees of freedom aero-elastic system for modelling vibrations of human vocal folds was originally developed by which the physiological conditions for so-call [...]
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34.
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Bach, P.
The paper deals with stability conditions of milling machine tools. As instability a self-excited vibration development, called chatter, under certain cutting conditions [...]
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To a basic one-mass self-excited system a tuned absorber is attached the motion of which is influenced by soft impacts. The self-excitation is considered as of van der Po [...]
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The gable wall standing over the entrance into a neo-gothic church and fixed on both sides of its base into towers, swayed with well-visible amplitudes out of its plane i [...]
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This paper is concentrated on modelling of friction effects in bladed disk of steam turbine, which are realized by means of friction elements placed between blades shroud [...]
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Engineering structures subjected to dynamic loading are often equipped with special devices proposed to suppress adverse motion. However, these installations are often d [...]
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This paper deals with the development of process for finding the optimal number and location of piezoceramic actuators and sensors to suppress the vibration of 2D systems [...]
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This paper deals with energy harvesting principles, current and future applications of these devices. The paper critically evaluates opportunity of such power supplies fo [...]
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There are several measures which can be used to predict, prevent and resolve the problems of liveliness in footbridges. The Frequency tuning means avoiding the critical f [...]
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42.
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Wind excited vibrations of slender structures such as towers, masts or certain types of bridges can be reduced using passive or active vibration absorbers. If there is av [...]
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The paper describes the influence of water/gypsum ratio to the dynamic modulus of elasticity of dental gypsum. Commercially available dental gypsum Interdent® (with comp [...]
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The bridges, footbridges and broadcast towers create an important subset of infrastructure subjected to dynamic loading of various origins. Especially, exposed to wind, t [...]
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In this paper is surveyed the influence of the perturbation using model RK4. The perturbation was induced by centrifugal force. The measurement was made to evaluate influ [...]
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The paper describes a modelling technique of tool rest of modern machining centre with focus at damping of dovetail groove slideway. Damping of tool rest structure strong [...]
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Abstrakt: The aim of this contribution is to propose a new phenomenological model enabling description of non-monotonicity of shear-viscosity function for rheologically c [...]
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74.
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Dobiáš, Štěpán
Abstrakt: In this paper, the utilization of information systems in industrial practice will be discussed. Several kinds of information systems are used in works, but we f [...]
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Abstrakt: The integral concepts for calculation of the generalized stress intensity factor and elastic T stress are presented. Both the integrals are based on a validity [...]
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76.
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Holub, Rudolf
Abstrakt: Frequently, a manufacturer will have to demonstrate that a certain product has met a goal of certain reliability at a given time with a specific confidence. Oft [...]
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77.
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Hynek, Pavel
Abstrakt: This paper describes three modelling technique for rub related phenomena in rotor systems and compares their suitability for numerical simulation. Numerical tes [...]
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78.
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Iwaszko, Jerzy
Abstrakt: The formulas for calculating the air flow rate in pneumatic components given in [1 , 2, 3 J were compared. Flow rating parameters, sonic conductance C and criti [...]
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79.
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Kafka, Vratislav
Abstrakt: Inelastic macroscopic behavior of technical as well as biological materials is strongly related to their structures. Therefore, constitutive modeling of the res [...]
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Abstrakt: The dimensioning of the metal-diaphragm depends on the maximum measured pressure and on necessary preload. Classic methods of elasticity were used to get some p [...]
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Abstrakt: A stability criterion based on generalized strain energy density factor for a crack terminating at the bi-material inteiface is suggested. The strain energy den [...]
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Omes, Jiří
Abstrakt: Recently there is a large development and exploitation of hydraulic presses. Development of these presses leads to endeavour after exploitation of pulsating for [...]
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84.
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Abstrakt: In all power plants (classical and nuclear) are used safety relief valves. After opening of this ones the mass of fluid (gas or steam) begin to move with very h [...]
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Abstrakt: The traditional method of motion description of heavy machines are differential equations. In this paper for the description of tractor motion was used the meth [...]
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86.
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Abstrakt: The excited one degree of freedom mechanical system with soft impacts, characterised by triangle hysteresis loop, is investigated using numerical simulation. Sm [...]
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87.
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Peterka, František
Abstrakt: Dynamic properties of the mechanical system with one degree of freedom containing soft stop are investigated. Dynamical impact model respects the non-linearity [...]
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88.
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Abstrakt: To determine heat transfer coefficients on a surface, an inverse task is used that requires either measured surface temperature history or, more often, measured [...]
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Abstrakt: The presented paper deals with procedure created for quality and reliability evaluation of ductile fracture criteria group. The base for criteria verification i [...]
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90.
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Švancara, Pavel
Abstrakt: Correct determination of individual SEA parameters is necessary to build a reliable SEA model. Especially for subsystems with complex geometry and material may [...]
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91.
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Abstrakt: This contribution deals with the functional description and initial setting of the Reactor Vibration Monitoring System (RVMS) that is supplied as a part of the [...]
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92.
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Abstrakt: Finite element analysis was attempted to modeling microcracks and overall response of solid composites (two-dimensional problem) under compression. As a mathema [...]
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93.
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Zapoměl, Jaroslav
Abstrakt: Rotors belong to the most frequently used components of machine devices. In a number of cases they are coupled with the stationary part through hydrodynamical b [...]
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Current active vibration suppression systems usually consist of piezoelectric actuators bonded to the surface or embedded within the structure. In most of these structure [...]
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97.
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One of the possibility, how to reduce amplitude of transversal vibration of rotors is to put together their rotating and no-rotating part by the squeeze film damper. This [...]
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98.
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In this paper, an approach to dynamic analysis based on the fuzzy set theory is presented as a alternative to the classical stochastic dynamic analysis. The material para [...]
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99.
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The contribution deals with a mathematical model of bending vibrations of a slender flexible rotor, excited by unbalance when passing the critical speed. The analysed rot [...]
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100.
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The paper the synthesis of the receptance by using the block diagrams. This method has some advantages. Each sub-system is described by its receptance and occurs in the [...]
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101.
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The endeavour to use the changes of dynamic characteristics for the determination of damage or other imperfections of structures is not new. The rudimentary application o [...]
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102.
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To be able to influence the vibration of real structure it is necessary to identify its dynamic behaviour. Identification of modal parameters can be done by means of comp [...]
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103.
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At the loudspeaker system designing, especially for bass zone, many things have be taken to account. First it is loudspeaker, secondary loudspeaker’s baffle board. For [...]
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104.
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Ferfecki, P.
For the purpose of efficient diagnostics of fault conditions the influence of transverse fatigue crack on dynamical behaviour of a rotor system supported by active magnet [...]
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105.
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Slender structures exposed to wind influences are subjected to a random component of the pressure generated by a fluctuation part of the wind velocity. The structure it [...]
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An analytical solution is derived from an approximation of the 2D thin plate model. At first approach the model is described by Kirchhoff and Rayleigh model, then by Timo [...]
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The radiated sound pressure level (SPL) during phonation is known to be mainly regulated by lung pressure and glottal resistance (adduction), at the glottal level. Few re [...]
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108.
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At the present time mainly FEM is used for numerical modelling of composite layered solids and structures. Using FEM, a significant amount of research has been devoted t [...]
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109.
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The paper deals with mathematical modelling of vibration and modal analysis of a four-axle locomotive with two bogie. Each bogie has two individual wheelset drives. The m [...]
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110.
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Gottvald, J.
In case of bucket wheel excavators (BWE) the digging forces are dominant sources of vibrations. The influence of digging forces on steel structures of upper part of BWE d [...]
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111.
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This paper is aimed at reducing vibrations of bladed disk in particular operating state. The damping element used in this contribution is realized by a strap with isoscel [...]
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112.
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Flexural vibrations of rotating disk contain forward and backward traveling waves can be excited at certain speed of rotating disk also by a standing constant single poin [...]
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This paper is concerned with mathematical modeling of the imperfect bladed disk with friction elements, which are used to suppress blade vibration. These kinds of systems [...]
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The vibration amplitude of rotors excited by imbalance can be significantly reduced if damping devices are inserted between the rotor and its stationary part. To achieve [...]
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Burša, Jiří
Abstrakt: The paper compares various types of cohesion tests used in testing of adhesive connection of two materials. The computational modelling using FEM confirms that [...]
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148.
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Abstrakt: The paper deals with an open channel flow around model of a bridge when the water depth is higher than height of the bridge opening. Both the pressured flow thr [...]
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149.
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Abstrakt: Two medium-term experiments with lateral pressure of flowing loose sand acting on a retaining wall were performed. The experiments showed some rather unexpected [...]
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150.
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Křen, J.
Abstrakt: The problem of the interaction between a liquid and flexible continuum occurs very often in practice. In the male urinary tract the interaction between urine an [...]
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151.
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Abstrakt: Filament winding is an important manufacturing technology of composite. In general, filament wound composite elements can be taken as laminated composite, but d [...]
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152.
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Abstrakt: Having new, very powerful tool for stress analysis in form of modem simulation methods as FEM we are able to determine stress and strain state in the examind st [...]
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153.
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The contents of the paper is a comparison models of vibration of the cantilever beam with the backstop. The beam model is solved by analytical method and also by using fi [...]
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154.
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One of the possibility , how to reduce amplitude of transversal vibration of rotors is to put together their rotating and no-rotating part by the squeeze film dampers. In [...]
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155.
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As in case of previous papers published on conference IM 2000, 2001, 2002 the influence of asymmetry at oscillating three-dimensional resiliently borne body, rigid plate, [...]
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156.
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During the past decade, there has been a tremendous interest in the use of piezoelectric sensors and actuators for structural control applications. Some of the attributes [...]
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157.
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The possibility of localising and quantifying a damage in a vibrating structure based on measured vibration amplitudes of the first harmonic in some locations of the stru [...]
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158.
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A 3D finite element model of the human larynx including the vocal folds was developed. The model enables to take into account phonation position (tension and adduction) o [...]
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159.
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A linear four degree-of-freedom (DOF) lumped model with 15 parameters of the human body sitting on a hard seat without a back-rest is developed in the sagittal plane (x-z [...]
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160.
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The paper deals with a working prototype of a system for the active vibration control of journal bearings to prevent rotor instability due to the oil film. The controllab [...]
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161.
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Now a day, many types of seat used in working machines are constructed for vibroizolation in vertical direction. Seat vibrations in longitudinal and lateral directions ar [...]
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162.
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The following article presents the results of analysis of slender bridge structure to dynamic loads induced by movement of people. Further is emphasized the importance of [...]
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Japan Prestressed Concrete Engineering Association set up the technical committee on "Application of High Strength Prestressing Tendons to Prestressed Concrete Structures [...]
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Abstrakt: One of the main requests in engineering practice is to have an effective design procedure of a reinforced concrete continuous beam. This task is a multidimensio [...]
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Abstrakt: Vibrations of VVER 1000 pipeline. This contribution explains the causes of highfrequency pipeline vibrations between regulation valves and 1000 MW turbine body [...]
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204.
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Abstrakt: The procedure based on a traditional genetic algorithm (GA) is demonstrated on the price optimization of a vibrating block foundation. Unbalanced rotating mass [...]
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205.
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Ballo, I.
In the paper the properties of active and semi -active suspensions of heavy goods vehicle are compared. The criteria of comparison were the RMS sprung mass vertical accel [...]
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206.
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In the paper, the relationship for the energy of undamped dynamic system forced by general force impulse and its steady response are descibed. The acquired relations need [...]
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207.
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The paper deals with the comparison and assessment different conception of a vibration microgenerator construction. The vibration microgenerator is device that generates [...]
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208.
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The paper deals with the modelling of balancing machine vibration and the identification of the stiffness and damping coefficients of oil-film bearings. The real balancin [...]
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209.
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Holka, H.
The aim of the present research was to investigate the method of identifying the function of rotary vibration of the object in plane motion. The body motion was defined i [...]
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210.
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In this paper transfer of vibration from motor to the bottom group of rotary drier is analyzed in the ADAMS/Vibration module environment. Excitation from unbalanced motor [...]
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211.
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The "Sněžka" Reconnaissance and Observation System is the special military design of the elevating platform truck. The authors of this paper took part in the experiment [...]
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212.
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Moving load is such a load, which vary both in time and space. As the result the stress state of piping increase and frequency spectrum decrease. If the flow velocity is [...]
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213.
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Švancara, P.
Statistical Energy Analysis (SEA) is suitable method for analysis of sound and vibration in high-frequency range, but to build a reliable SEA model is necessary correctly [...]
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214.
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Wind excited vibrations of slender structures such as towers, masts or certain types of bridges can be reduced using passive or active vibration absorbers. If there is av [...]
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215.
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This paper deals with the methodology of the modelling of rotating shafts with flexible disks. Rotating shafts are modelled as one dimensional continuum on the basis of [...]
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216.
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The paper is devoted to the analytical and experimental stress analysis in aluminum tube of car air – conditioner at static and dynamic loading at test equipment. After [...]
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217.
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Building structures in the vicinity of above-ground or underground transport lines are loaded by vibrations excited by the passage of motor vehicles or trains. These vibr [...]
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219.
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An investigation of the vertical vibration of the 3D vehicle model with asymmetry suspension, under damping and mass distribution at vehicle crossing over a system of the [...]
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220.
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Tůma, J.
The paper deals with angular vibration measurements using incremental rotation encoders. The main topic is focused at errors due to the impulse non-uniform distribution v [...]
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221.
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The solution of vibration transfer from the subsoil to the structure is demonstrated using the example of a multi-storey reinforced concrete building, founded on a dual f [...]
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222.
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Large amplitude vibrations of cylindrical structural elements are observed when under the simultaneous action of wind and rain. Due to the action of wind and rain a trans [...]
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223.
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This paper elaborates the mechanisms for enhancing the ductility of the interface between substrate concrete and patched repair materials. The authors investigated four t [...]
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Abstrakt: The internal combustion engine development process requires CAE models which deliver results for the concept phase at very early stage and which can be further [...]
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249.
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Abstrakt: The impact motion of rigid rotor supported on passive magnetic bearings is studied. Impacts on passive magnetic bearings are investigated. Impacts occur in reta [...]
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250.
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Abstrakt: As in case of previous papers published on conference IM 2000, 2001 the influence of asymmetry at oscillating three-dimensional resiliently beared body, rigid p [...]
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251.
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Pečínka, L.
Analysis of the dynamic response of the beam under moving load and axial periodic force and with constant damping result in well known solution of Mathieu equation. In fa [...]
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252.
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The paper describes a new method of analysis of the non-stationary response of a bridge model subjected to the wind load. The analysis is based on the decomposition of th [...]
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253.
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Půst, L.
Majority of publications on mechanical vibrations are based on the assumption that the external excitations is produced by an ideal source of power with prescribed freque [...]
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254.
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The paper deals with simulation of an electromagnetic vibration power generator. The vibration power generator harvests electrical energy from ambient energy of the mecha [...]
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255.
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The paper presents the modal synthesis method for a mathematical modelling of rotating bladed disk vibration. The standard finite element software does not allow to cons [...]
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256.
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This paper describes mathematic model of C-axis over mentioned machine. C-axis is controlled with position feedback and its mathematic model is determined for observation [...]
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257.
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Naď, M.
The existence of a crack in a structural member introduces local modification of flexibility and consequently affects the dynamic behaviour of the cracked member. In this [...]
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258.
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Nánási, T.
The list of all possible boundary conditions corresponding to particular differential operator is much greater than usually presented in open literature. Gallery of vario [...]
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259.
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In order to simulate a launch, all space instruments undergo a vibration tests. Due to the fixing points in vibrating machines being different, adapters are used for each [...]
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260.
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This article is concerned with capabilities of bifurcation and chaos analysis methods used for analysis of the automotive differential operation and noise. The purpose of [...]
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261.
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This paper deals with the influence of moisture in determining the mechanical properties (dynamic modulus of elasticity) of porous building materials using nondestructive [...]
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Daněk, V.
Abstrakt: The results oj computational estimations oj deviation histories oj aircraft pitching control in dependence on jlight regime at steady horizontal jlight are pres [...]
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280.
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281.
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In this work there has been made an attempt to evaluate the influence of the base surface vibrations on the rotor balancing. Tests were made on a laboratory stand where a [...]
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282.
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In this paper the authors presents the use of global optimization techniques as a viable tool for parametric model-based damage detection especially the application of ge [...]
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283.
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The paper presents an analysis of vibration of electromechanics system consisting of a 1DOF vibrating mechanical subsystem connected by means of spring and crank mechanis [...]
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284.
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The article is a contribution to numerical simulations of pitting arise phenomena on the gear teeth. The basic assumption of the presented simulations was that pitting (p [...]
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Zelenka, J.
The paper deals with the running properties of the working Diesel rail car MPV 22, reconstructed from the former machine of the DGKU-5 type, by the Track Machine Station [...]
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299.
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Čech, V. jun.
This paper deals with introduction to problems of measurement of mechanical vibration with six degrees of freedom by optic sensors. Short description of method for improv [...]
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300.
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Čečrdle, J.
The paper deals with the aircraft landing shock aeroelastic response analysis. The analysis was performed as a part of the aircraft certification in order to fulfill the [...]
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The paper deals with mathematical modelling of vibration and modal analysis of an individual wheelset drive with a hollow graduated shaft. The method is based on the syst [...]
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312.
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Two parameters of bone microarchitecture: volume of bone layer and fractal dimension were used. 42 human bone samples were cut to cylindrical testing samples of 8.5 mm th [...]
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Tůma, J.
The paper deals with the problem of angular vibration measurements. The source of information about angular vibrations is an incremental rotary encoder producing a string [...]
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317.
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The present world development of mobile machines leads to a highpowered high-speed constructions with minimum dimensions and masses. By such light high-speed systems as a [...]
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321.
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Scuffing is a particularly severe form of gear tooth surface damage in which seizure or welding together of areas of tooth surfaces occurs, due to absence or breakdown of [...]
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322.
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The basic problem of analytical and computer design of the spatial gears is the synthesis of their tooth surfaces. The technology of many gear pairs manufacture is based [...]
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323.
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The paper concerns the main problems which appear during cutting spiral bevel gear according to Spiral Generated Duplex Helical method. The geometrical solutions and math [...]
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324.
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325.
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Abstrakt: A parametric optimization of the gearbox in steady vibration excited by gear kinematics transmission errors is presented. The process is based on the gearbox de [...]
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326.
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The crack growth prediction techniques in the critical area of the small transport aircraft undercarriage bracket has been describe in this paper. Stress-state was determ [...]
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327.
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Today the drive system is considered mainly as interactive system containing a range of subsystems with different physical nature: mechanical – the basic ones, electric [...]
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328.
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The analysis of dynamics of time heteronymous weakly and strongly non-linear planetary transmission systems with kinematic couplings – gears constitutes a study of comp [...]
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329.
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Abstrakt: Two relatively independent areas of the gearing science have been distinctively outlined and considerably progressed in the last decade. The "Theory of gearing" [...]
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330.
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Abstrakt: The paper describes methods of hard cutting spiral bevel and hypoid gears. From the G leason system TAN -TR U method and conventional generating methods using c [...]
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331.
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332.
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The problems of analysis, modelling and simulation of drive systems are solved on Institute of Mechanics of Solids for over 20 years. During that time period not only the [...]
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333.
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Mudrik, J.
Contribution deals with machine aggregates with locking elements (worm gearings and cross-axis helical gearings). Vibrational processes in aggregates with locking mechani [...]
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334.
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Abstrakt: Příspěvek popisuje koncepci měřícího boxu, vyvíjeného na ÚK FSI VUT v Brně pro účely snímání dynamických parametrů jedoucího vozidla. K měř [...]
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335.
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The point of contribution consists in the analysis of linear and nonlinear damping influence on the dynamic properties of the specific case of pseudoplanetary system with [...]
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336.
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This paper presents a solution of high-frequency dynamic effects occurring in the mesh of pair of gears that was formulated and calculated using the MATLAB development en [...]
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337.
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The impact effects in gear mesh represent specific phenomena in the dynamic investigation of highspeed light transmission systems with kinematic couplings. They are cause [...]
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338.
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339.
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340.
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Tesár, A.
The paper describes the application of technical theory of thin-walled box structures for the assessment of shear lag effects in thin-walled box bridges subjected to dyna [...]
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341.
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