Cover of: Wave propagation, moving load, vibration reduction | International Workshop Wave 2002 (2002 Okayamaken, Japan)

Wave propagation, moving load, vibration reduction

proceedings of the International Workshop WAVE 2002, Okayama, Japan, 18-20 September 2002
  • 271 Pages
  • 2.35 MB
  • English
Balkema , Lisse, Exton, PA
Wave mechanics -- Congresses., Railroads -- Track -- Vibration -- Congresses., Vibration -- Congre
Other titlesProceedings of the International Workshop WAVE 2002, Wave 2002
Statementedited by Nawawi Chouw, Günther Schmid.
ContributionsChouw, Nawawi., Schmid, Gunther.
LC ClassificationsQC174.2 .I58 2002
The Physical Object
Paginationxv, 271 p. :
ID Numbers
Open LibraryOL3325600M
ISBN 109058095592
LC Control Number2004299122

1st Edition Published on January 1, by CRC Press Papers on moving load, as well as measurements and track dynamics, from proceedings of the international w Wave Wave Propagation - Moving Load - Vibration Reduction: Proce.

Moving load; measurements and track dynamics; building vibrations and their reduction; wave field Wave propagation. Other Titles: Wave propagation, moving load, vibration reduction Proceedings of the International Workshop Wave Responsibility: edited by Nawawi Chouw, Gunther Schmid.

Vibration reduction Reduction of response and first excursion probability for random excitation using 93 nonlinear characteristics 5. Aoki Impediment of wave propagation from a moving source via the subsoil into the building N. Chouw & G. Pflanz Efficient numerical approach for the analysis of vibrations due to moving load S.

Hirose. Classical theory of wave propagation. Elastic medium subjected to moving loads. Elastic unbounded body subjected to a moving point load. Elastic half-space subjected to a moving line load.

Elastic half-space subjected to a moving point load. Beam on elastic half-space subjected to moving loads. Tunnel structure subjected to moving loads. Wave Propagation for Train-induced Vibrations: A Finite/Infinite Element Approach Y.

Yang, H. Hung For buildings and factories located near railway or subway lines, the vibrations caused by the moving trains, especially at high speeds, may be annoying to the residents or detrimental to the high-precision production lines. Wave Propagation for Train-Induced Vibrations, pp.

() Effect of load-moving speed. Effect of trench depth. Effect of trench width Moving loads with self oscillation. Vibration Reduction by Wave Impeding Block. Moving loads with no self oscillation. Effect of load-moving speed. Effect of depth of WIB. Effect of thickness of.

The reduction effects of wave barriers depend on the frequency of vibration source for both passive and active isolation cases. In-situ measurements confirm that vibration screening systems using open or in-filled trench barriers can be applied as a reduction measure for soil vibrations due to a moving load which is considered as stationary.

The Velocity of Propagation of Waves© Experiment The wavelength of the wave is twice the distance between those points in the wave at which the medium does not move.

Such points are called nodes. For the open ended pipe, this length is ¾ a wavelength (it is the second mode of vibration, not the first!). Calculate and record the. In the literature, fewer studies are available on the screening efficiency of trench to reduce the train induced vibration.

Yang and Hung () and Hung et al. () have employed D finite.

Download Wave propagation, moving load, vibration reduction FB2

Vibration reduction. Flow fluctuation from the hydraulic pump or load causes a sudden increase or decrease in control pressure, after throttling by fixed orifice, which is felt by the pressure sensing chamber.

After the pressure fluctuation is slowed down, the pressure is. vibration is of great importance in the development of vibration control guidelines. In other words, the vibration reduction methods can be divided into three groups includ-ing: vibration reduction methods in source, vibration reduction methods in propagation path and vibration reduction methods in receiver, which are indicated in Fig.

Wave Wave Propagation - Moving Load - Vibration Reduction N Chouw, G Schmid Papers on moving load, as well as measurements and track dynamics, from proceedings of the international workshop in Bochum.

Details Wave propagation, moving load, vibration reduction EPUB

Also covering building vibrations and wave field analysis. The vibration of interest in this case has frequency components from about 15 Hz to Hz. To understand the mechanisms of vibration propagation from tunnels, a predictive model has been developed for ground vibration generated by a stationary or moving harmonic load applied in a circular lined or unlined tunnel in a layered ground.

A wave does not move mass in the direction of propagation; it transfers energy. Key Terms. medium: The material or empty space through which signals, waves or forces pass. direction of propagation: The axis along which the wave travels.

wave: A moving disturbance in the energy level of a field. Get this from a library. Wave propagation, moving load, vibration reduction: proceedings of the International Workshop WAVEOkayama, Japan, September [Nawawi Chouw; Gunther Schmid;].

Description Wave propagation, moving load, vibration reduction PDF

A solution procedure is presented to compute free field vibrations induced by train or road traffic, the excitation being either deterministic or stochastic. The full interaction between the vehicle, the track or road and the soil is accounted for, using a substructure approach that takes advantage of the fact that the properties of the track or road and the soil do not change along the.

propagation become non-linear. Vibration, by contrast, occurs in media ranging from rock or solid concrete, through water and soil to lightweight panels. It can propagate as a compression wave, a shear wave, a variety of surface waves, bending waves, torsional waves, either separately or together.

Proceedings, 2nd International Workshop WAVE Wave Propagation-Moving Load-Vibration Reduction Ruhr University Bochum. Degrande and G. Lombaert, “High-speed train induced free field vibrations: In situ measurements and numerical modelling,” in Proceedings of the International Workshop WaveWave Propagation, Moving Load, Vibration Reduction, edited by N.

Chouw and G. Schmid (Rühr University, Bochum, Germany, ), pp. 29– (flexibility) matrix. He discussed the propagation zone and the attenuation zone of the periodic element This idea is well advanced in the mechanical engineering and acoustic [6].

This study aims to analytically investigate the possibility of screening of ground transmitted wave and reduction of structural vibration by periodic wave barrier. 图书Wave Propagation for Train-induced Vibrations 介绍、书评、论坛及推荐. the vibrations caused by the moving trains, especially at high speeds, may be annoying to the residents or detrimental to the high-precision production lines.

It can be used to evaluate the efficiency of various wave barriers for vibration reduction. Based on the Biot’s model for saturated porous media and functionally graded materials (FGMs), the isolation effect of saturated porous FG wave impeding block (WIB) on reducing vibration induced by a moving load in a saturated foundation is studied.

The dynamic governing equations for saturated foundations under a moving load are obtained by using the coordinate transformation, and the.

The propagation effects of the ground layers are important but the computation of the transfer function from each sleeper, which would be required for a phase coherent summation of the vibration. The concerned 3dimensional wave propagation in soils is solved by using the Fourier The moving train load of certain frequencies is represented by the traction distribution on The authors have previously proposed a vibration reduction method by installing a wave impeding block (WIB) of concrete material inside embankrnent.G) It is noted.

Combined with the coordinate transformation, the dynamic governing equations for elastic foundation under a moving load are established by using the reverberation ray matrix method, and the isolation effect of a graded wave impeding block is studied. The displacement and the stress are obtained in the time domain by using numerical inverse Fourier transformation.

vibration reduction by open trench with a rectangular or a circular cross-section. Considering the coupling e is compatible with a nite speed of wave propagation. It free wave eld due to the surface moving load can be determined.

In view of (a), (b), and (c), all the variables. The vibrations induced by moving trains especially in close distances with high-rise buildings can be destructive. The high technology of wilding rails induced a high train velocity which is associated with high vibrations.

The buildings near the railways suffer from the train-induced vibrations. In this paper, a 3D FEM model was constructed to study the train-induced vibrations on a nearby. Moving Load 3 Y H Pao, W Q Chen, Y Q Guo and J Q Jiang Wave Propagation in Layered Viscoelastic Media 5 L Sun, B Xu, Y Zhang, B J Kim and F Q Luo Relation Between the Ground Vibration and the Geographical Features and Geology Conditions for the Railroad Vibration.

Environmental Vibrations Prediction, Monitoring, Mitigation and Evaluation edited by Hirokazu Takemiya. Environmental Vibrations contains the invited and regular papers written and presented by widely respected academic professionals and engineering specialists.

Features: Describes the current state-of-the art in addition to the expertises and practices in the related fields. Transmission of train-induced vibrations to buildings located in the vicinity of the track is one of the main negative externalities of railway transport, since both human comfort and the adequate functioning of sensitive equipment may be compromised.

In this paper, a 3D FEM model is presented and validated with data from a real track stretch near Barcelona, Spain. Furthermore, a case study is. Acoustic waves are a type of energy propagation through a medium by means of adiabatic compression and decompression. Important quantities for describing acoustic waves are acoustic pressure, particle velocity, particle displacement and acoustic ic waves travel with a characteristic acoustic velocity that depends on the medium they're passing through.We used to use wave propagation models to model the interior of cars, for use with noise cancelling.

Essentially that means the phase angle of the mode is no longer +/- 90 degrees, so you get travelling energy, whereas your standard modal assumes quadrature, hence no energy transfer. This study shows that the reduction capacity influenced by the phononic crystal bandgap is stable under different train speeds.

In addition, under train load, the metabarrier can be used not only to isolate vibration by means of the bandgap, but also to absorb vibration dynamically, further expanding the vibration reduction frequency range.