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In the domain of heritage buildings conservation, interventions must be designed, whenever possible, to maintain existing materials instead of their replacement by new on [...]
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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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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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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 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: 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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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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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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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: 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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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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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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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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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 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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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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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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The contribution deals with the arrangement of coordination mechanism of gait controllers of four legged robot. Robot system is modeled as discrete events dynamic system [...]
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This paper presents the work performed by the Institute of Aerospace Engineering, Brno University of Technology. Purpose of the project was to compare the results obtaine [...]
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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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Půst, L.
The more precise mathematical models of dynamic systems must contain also more exact description of sources of excitations. The paper deals with the analysis of electric [...]
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This contribution deals with computational modelling of static and dynamic analysis of journal bearings. In this contribution a new theoretical approach to the modelling [...]
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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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Uruba, V.
Velocity field of a synthetic jet has been investigated experimentally. The synthetic jet is generated by electro-dynamical system designed for control of free shear laye [...]
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In this paper, compressive strength, porosity and two “in situ” techniques (ultrasonic velocity and rebound hardness test) are used for the characterisation of mortar [...]
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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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Daněk, V.
The stability of the asymmetric flight regimes, where the couplings between longitudinal and lateral aerodynamic characteristics are significantly influencing each other, [...]
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The aim of the paper is to propose an integration of a genetic algorithm and case-based reasoning in robot motion planning in a partially known dynamic environment. The g [...]
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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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The dynamic properties of rotor supported on passive magnetic bearings is investigated by means of numerical solution and by measurement on the prototype of experimental [...]
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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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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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Klečka, R.
The paper deals with a problem of control directional vehicle stability using a method that is known as hardware-in-the-loop simulation. In MATLAB/Simulink I designed the [...]
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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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Presented paper is concerned with the numerical modeling of quasibrittle materials such as concrete. Brancherie and Ibrahimbegovic are authors of a simple model capable o [...]
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Losík, V.
So far the static as well as dynamic aeroelastic tasks have been commonly solved by using linear models of fluid flow (p-k method, DLM) implemented e.g. in system MSC.Nas [...]
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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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Many structures encountered in civil, mechanical, naval or aerospace engineering can show properties of auto-parametric systems. The general mathematical structure of the [...]
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Schuster, M.
This paper is a short overview of engineering approach to study rail vehicles aerodynamics and aerodynamic interaction between the trains and vicinity infrastructures. Sh [...]
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The physical model of two cylinder hydraulic damper is composed from several groups of equations, which describe: a) the dynamic equilibrium of the forces loading the val [...]
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The application of the drilling test on the characterisation of homogeneous stones is widely used, mainly on carbonate stones that are softer. The drilling revolution and [...]
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Byrtus, M.
The paper summarizes the method of nonlinear normal modes (NNMs) which has gained importance in nonlinear dynamics. Two main definitions of NNMs are discussed: Rosenberg' [...]
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The article describes design of vehicle track computation model and basic testing step of dynamic loading simulation of the track. The model is built for computational si [...]
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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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Approach for determination of the dynamic behavior of an elastic body submerged in fluid is presented in this contribution. Method is based on independent solution of the [...]
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An experimental program has been carried out on recycled concrete with the aim of establishing the relation between the static modulus of elasticity Es and the dynamic on [...]
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This paper reports on an experimental program investigating the durability and mechanical properties of alkali activated slag concrete (AASC). The AASC was prepared using [...]
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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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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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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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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: 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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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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The testing pump with one water-pump impeller is described in this contribution. During rotation it is possible to analyse the forces and moments which impact the runner. [...]
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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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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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The paper presents two numerical models applied to a dynamic problem of interaction between fluid and a tube made of a flexible material. In particular, we model a foil [...]
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Král, J.
Repeated cold front transitions in January 2007 in the Czech Republic were accompanied by occurrences of strong winds. Before the strongest one, accelerometers and a reco [...]
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The paper is focused on damage identification of dynamically loaded structures using methods of soft computing including artificial intelligence. The damage and variabili [...]
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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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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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The principle of a steam turbine balanced control system is presented here. The dynamic stress measurement method in parts of valves on its models in the aerodynamic wind [...]
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Král, J.
A long-term measurement of the wind response of the first building started in 2007and of the second building in 2009. The response monitoring is automatic and continues. [...]
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Podešva, J.
The modeling of the mechanical structures with large number of degrees of freedom (DOF) was in the past the problem of the machine time and disk space. On the today’s h [...]
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Dynamic fragmentation (disintegration of continuous body into smaller pieces under dynamic loading) is a physical phenomenon observed in many fields of engineering and sc [...]
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Uruba, V.
The method for evaluation of temporal and spatial independent modes of a dynamical system is suggested. The dynamical system is represented by time dependent vector field [...]
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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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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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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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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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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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The paper shows possible modeling method of selected type of track. Selected type of track is a combat vehicle track. The paper describes creation of computational model [...]
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Frequency modal and damping characteristics of an aeroelastic model designed for experiments in the wind tunnel are studied. Based on the experimental modal analysis the [...]
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Malenovský, E.
This contribution deals with the overview of methods, which are used for analysis of dynamic behavior of rotor dynamics systems. The main of background research topics ar [...]
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177.
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Diagnostics based on monitoring of response changes in relation to operation load is a method determination of residual service life of building structures, state estimat [...]
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Drobný, V.
Reference model means simplified mathematical vehicle model which describes vehicle lateral dynamics. The output of the reference model produces the most optimal trajecto [...]
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The paper describes one of possible design way of vehicle track computation model and basic steps of dynamic loading simulation of the vehicle track. The computational mo [...]
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Dynamics of separation process of a turbulent boundary layer subjected to adverse pressure gradient is studied experimentally. The Time Resolved PIV method is used to acq [...]
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Uruba, V.
A new method for analysis of spatio-temporal data is proposed. This is based on combination of Proper Orthogonal Decomposition and Principal Oscillation Patterns methods. [...]
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The presented paper deals with an analysis of steel structure dynamic properties. The construction, which consists of stationary and movable parts, is expected to be unde [...]
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This paper belongs to biomechanics of a hip joint section. It is engaged in problems with industrial tolerances for dimensions as one of the possible total hip prosthesis [...]
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The paper deals with problems of the central burst defect prediction in axisymmetric cold drawing of the brass bar. The problem is analyzed numerically by using 2D finite [...]
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Kozánek, J.
The 3n and 4n state space formulations of system of n linear secondorder ordinary differential equations with special right side are proposed. The paper is concerned to a [...]
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Results of experiments on fully developed turbulent boundary layer are presented. The boundary layer was generated on a smooth flat wall forming one side of the channel o [...]
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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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The differential equation of collapse of a high building is derived taking into account many influences. Computer simulation of the collapse of the WTC building is presen [...]
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This study investigates the engineering properties of composite geopolymer mortar manufactured by replacing the slag with metakaolin of 0, 30 and 70% by weight, together [...]
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Object of the contribution is a summary of outlook on topic „Longterm monitoring of dynamic response of engineering structures“. The contribution contains requirement [...]
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Hlaváček, M.
Articular cartilage is often modeled as a biphasic mixture (a solid porous matrix swollen by a fluid that may move slowly through the matrix pores). The anisotropic matri [...]
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Čulík, J.
The top of article is mechanic model of hand power grip. The algorithm of calculation of tendon and finger joint forces and finger stress state is presented. The results [...]
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Abstrakt: Článek se zaměřuje na řešení torzního testu pro krátký ocelový vzorek. V průběhu řešení bylo respektováno uchycení v čelistech zkušebního s [...]
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Abstrakt: After mixing kaolin with water attractive and repulsive forces between kaolin particles initiate process of coagulation and peptisation, respectively. The coagu [...]
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The hypothesis was stated, that the relaxation oscillation emerge in the surface layers of wheel and rail, by the accelerating and braking period of the rail vehicles. Th [...]
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The article gives the general view to the detection of defects (rather the cracks) of mechanical structures through initializing and receiving so-called Rayleigh waves, w [...]
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Changes of mechanical properties, namely of modulus of elasticity, often play a role of damage accumulation indicators in the framework of fatigue behaviour of composite [...]
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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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Kadlec, M.
Polymer composite panels are widely used in aeronautic and aerospace structures due to their high strength vs. weight ratio. The objective of this study is to determine m [...]
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269.
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In this study ultrasonic computer tomography and sonography are compared in the investigation of a cored marble column. The marble column presents a complex stratigraphy [...]
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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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The aim of the paper is the application of the finite element method in modelling of the problems of piezoelectric and ferroelectric structures. Model is applied in model [...]
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272.
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One of the unwanted effects during braking is non-uniform heating of the brake disks and formation of hot spots. In the present contribution, an extension of Lee and Barb [...]
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273.
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To better understand ultrasonic wave propagation in thin-wall structures (e.g. glass or composite plates) and to evaluate physical properties of the structure material, n [...]
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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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The paper deals with 3D motion measurement of washing unit realized on the industrial washer-extractor WF11 (FS10) produced by Primus CE company in Pribor (Czech republic [...]
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277.
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Friction influence in analysis of a single degree of freedom oscillatory system (SDOF) is either neglected or accounted for by analytical methods, assuming steady state h [...]
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278.
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The paper deals with development of a computational model describing oil expression from oil-containing seeds. The principles of compression in the rotating screw pressin [...]
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279.
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The paper is devoted to the practical applications of methods of experimental mechanics to the specific problems at product of steel strips. The use of two methods of exp [...]
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280.
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Knowledge of the physical properties of materials is basis for design and mathematical modeling of complex systems, where the materials are used. Frictional properties of [...]
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281.
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Physical experiments dealing with the problem of lateral pressure of granular materials proceed some years using medium-size models of the ideal non-cohesive granular mas [...]
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282.
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The conditional analysis of the skin-friction was applied on time records made in transitional boundary layers originating under boundary conditions prescribed for the ER [...]
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283.
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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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284.
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Malášek, J.
State of stress identification consists of these parts – of miniaturised pressure sensors in matrix arrangement and of a special strain-gauge bridge – this is a compl [...]
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