1.
|
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 [...]
|
2.
|
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 [...]
|
3.
| |
4.
|
Benčat, J.
The subject of the paper is the dynamic behaviour and expected wind response of the steel water tank tower. Full scale dynamic measurements were performed on the lattice [...]
|
5.
| |
6.
|
Čečrdle, J.
Submitted paper deals with the aileron flutter of the ultra-light aircraft. It gives an assessment of influence of the additional installation of the tab regarding the ai [...]
|
7.
|
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 [...]
|
8.
| |
9.
| |
10.
|
Zapoměl, J.
The rotor systems consit of two principal components, of a rotor and of a stationary part, and the fluid film bearings are often used as coupling elements. As the clearan [...]
|
11.
|
The paper presents experimental results of the optical measurements of flow field around a fluttering NACA0015 profile elastically supported with two degrees of freedom i [...]
|
12.
|
This paper deals with energy harvesting principles, current and future applications of these devices. The paper critically evaluates opportunity of such power supplies fo [...]
|
13.
|
One possibility how to decrease lateral vibration of rotors excited by imbalance of the rotating parts is to couple the shaft with the stationary part through squeeze fil [...]
|
14.
|
Pavlenko, M. V.
The present article describes the results of research related to vibration wave impact on the coal array and the coal seam in particular, which is used to increase the me [...]
|
15.
|
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 [...]
|
16.
|
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 [...]
|
17.
|
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 [...]
|
18.
|
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 [...]
|
19.
| |
20.
|
This paper describes some practical results achieved with the usage of the floating principle in machine tools design. It is linked to works presented at the IM2004 confe [...]
|
21.
| |
22.
|
Currently, the precast industry represents 20% of concrete production around the world and the use of steam curing to accelerate hydration has been adopted as one of the [...]
|
23.
|
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 [...]
|
24.
|
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 [...]
|
25.
|
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 [...]
|
26.
|
Engineering structures subjected to dynamic loading are often equipped with special devices proposed to suppress adverse motion. However, these installations are often d [...]
|
27.
|
The cable–stayed bridges are usually built for long span and are subjected to dead and moving loads, seismic motions of supports to wind forces, temperature and many ot [...]
|
28.
|
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 [...]
|
29.
| |
30.
|
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 [...]
|
31.
|
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 [...]
|
32.
|
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 [...]
|
33.
|
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 [...]
|
34.
|
Abstrakt: Vibrations of VVER 1000 pipeline. This contribution explains the causes of highfrequency pipeline vibrations between regulation valves and 1000 MW turbine body [...]
|
35.
|
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 [...]
|
36.
|
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 [...]
|
37.
|
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 [...]
|
38.
|
The bridges, footbridges and broadcast towers create an important subset of infrastructure subjected to dynamic loading of various origins. Especially, exposed to wind, t [...]
|
39.
|
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 [...]
|
40.
|
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 [...]
|
41.
|
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 [...]
|
42.
|
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 [...]
|
43.
|
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 [...]
|
44.
| |
45.
|
Abstrakt: The procedure based on a traditional genetic algorithm (GA) is demonstrated on the price optimization of a vibrating block foundation. Unbalanced rotating mass [...]
|
46.
|
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 [...]
|
47.
|
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 [...]
|
48.
|
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 [...]
|
49.
| |
50.
|
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 [...]
|
51.
|
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 [...]
|
52.
|
Current active vibration suppression systems usually consist of piezoelectric actuators bonded to the surface or embedded within the structure. In most of these structure [...]
|
53.
|
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 [...]
|
54.
|
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 [...]
|
55.
|
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 [...]
|
56.
|
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 [...]
|
57.
|
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 [...]
|
58.
| |
59.
|
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 [...]
|
60.
|
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 [...]
|
61.
|
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 [...]
|
62.
|
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 [...]
|
63.
| |
64.
| |
65.
|
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 [...]
|
66.
|
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, [...]
|
67.
|
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 [...]
|
68.
|
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 [...]
|
69.
|
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 [...]
|
70.
|
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 [...]
|
71.
| |
72.
| |
73.
|
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 [...]
|
74.
|
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 [...]
|
75.
|
The paper deals with the comparison and assessment different conception of a vibration microgenerator construction. The vibration microgenerator is device that generates [...]
|
76.
|
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 [...]
|
77.
|
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 [...]
|
78.
|
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 [...]
|
79.
|
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 [...]
|
80.
|
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 [...]
|
81.
| |
82.
|
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 [...]
|
83.
| |
84.
|
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 [...]
|
85.
|
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 [...]
|
86.
|
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 [...]
|
87.
|
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 [...]
|
88.
|
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 [...]
|
89.
|
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 [...]
|
90.
| |
91.
|
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 [...]
|
92.
|
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 [...]
|
93.
|
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 [...]
|
94.
|
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 [...]
|
95.
|
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 [...]
|
96.
|
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 [...]
|
97.
|
Programming robot PLC controller through voice recognition system has been presented. The purpose of this project is a development of a robot control voice protocol allow [...]
|
98.
|
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 [...]
|
99.
| |
100.
| |
101.
|
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 [...]
|
102.
|
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 [...]
|
103.
|
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 [...]
|
104.
|
The paper deals with simulation of an electromagnetic vibration power generator. The vibration power generator harvests electrical energy from ambient energy of the mecha [...]
|
105.
|
Mudrik, J.
Contribution deals with machine aggregates with locking elements (worm gearings and cross-axis helical gearings). Vibrational processes in aggregates with locking mechani [...]
|
106.
|
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 [...]
|
107.
|
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 [...]
|
108.
|
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 [...]
|
109.
|
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 [...]
|
110.
|
This paper deals with the influence of moisture in determining the mechanical properties (dynamic modulus of elasticity) of porous building materials using nondestructive [...]
|
111.
| |
112.
|
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 [...]
|
113.
|
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 [...]
|
114.
|
Algorithm of locally weighted regression is presented in this contribution. Local approximator repeatedly uses the locally linear model based on least square method. Simu [...]
|
115.
|
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 [...]
|
116.
| |
117.
|
Tůma, J.
The paper deals with differentiation and integration of sampled time signals in the frequency domain using the FFT and inverse FFT. The time signal integration in the tim [...]
|
118.
|
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 [...]
|
119.
|
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 [...]
|
120.
|
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 [...]
|
121.
|
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 [...]
|
122.
| |
123.
|
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 [...]
|
124.
|
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 [...]
|
125.
|
The paper deals with practical experience with measurement of acoustic power of the model - annular plate – while using plate absorptive dampers of the same area dimens [...]
|
126.
| |
127.
| |
128.
| |
129.
|
The paper describes the method of acoustical emissions measurement and evaluation on one of the typical machinery equipment - on gearboxes. Acoustical measurements were [...]
|
130.
| |
guest ::