Results 131 to 140 of about 6,112 (180)

A vibration technique for measuring railroad rail stress

The Journal of the Acoustical Society of America, 2002
Longitudinal rail stress, related to constrained thermal contractions and expansions, leads to broken and buckled rails, and consequent service delays and derailments. There is a broad consensus on the need for cost-effective and reliable methods for the measurement of rail stress.
Vesna Damljanovic, Richard L. Weaver
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Quantitative Simulation of Ground Vibration near a Railroad

The 10th International Symposium on Recent Advances in Exploration Geophysics (RAEG 2006), 2006
The purpose of this study is to make clear the mechanism of the ground vibration induced by trains and to develop a numerical simulation tool which can quantitatively evaluate the effect of wave filtering works. A 3D viscoelastic finite-difference method is used to study the mechanism of the ground vibration induced by train.
M. Katou, H. Kanda, Y. Sanada, T. Matsuoka   +3 more
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Experimental study of the vibration characteristics of railroad ties

Acoustical Physics, 2000
Vibration characteristics of railroad ties are investigated by the method of shock excitation. The feasibility of estimating the quality of railroad tracks from the harmonic analysis of these vibrations is demonstrated.
N. A. Vasil’ev, S. I. Dvornikov
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Isolation of residential buildings from ground vibration from railroad

Journal of the Acoustical Society of America, 2016
For residential developments near railroad tracks, ground vibration due to train movement is often a concern. Although there are usually no code requirements for vibration levels, ground vibration levels are often compared to the criteria recommended by the FTA; these criteria are sometimes explicitly included as part of the Conditions of Approval or ...
John LoVerde, David W. Dong
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A vibration prediction model for culvert-type railroad underpasses

Engineering Structures, 2018
Abstract Although underpasses are low-cost solutions widely used in high-speed railway lines, their dynamic analysis is complex given the large number of variables involved in the problem and the high computational cost of detailed 3D models. The objective of this study is therefore to present a simple and fast 3D method for estimating the dynamic ...
Manuel F. Báez H., Alberto Fraile, Javier Fernández, Lutz Hermanns   +3 more
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Anchorless Design of Electromagnetic Vibration Energy Harvester for Railroad

Volume 2: Diagnostics and Detection; Drilling; Dynamics and Control of Wind Energy Systems; Energy Harvesting; Estimation and Identification; Flexible and Smart Structure Control; Fuels Cells/Energy Storage; Human Robot Interaction; HVAC Building Energy Management; Industrial Applications; Intelligent Transportation Systems; Manufacturing; Mechatronics; Modelling and Validation; Motion and Vibration Control Applications, 2015
An electromagnetic energy harvester features anchorless mounting is designed and analyzed. It can harness electrical energy from railroad track deflections induced by passing trains. Anchorless mounting is designed to be easily installed on railroad sleepers without any change to the original foundation, it utilize a spring reset mechanism to capture ...
Teng Lin, Lirong Wang, Lei Zuo
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Response of Infinite Railroad Track to Vibrating Mass

Journal of Engineering Mechanics, 1988
The resonant frequency of the railroad track is first determined by Timoshenko by modeling the track as a beam on a massless Winkler Foundation. The mass of the foundation and the vibrating load is not included in the formulation. Timoshenko provides a simple expression for the resonant frequency ωR=k/m, where k=the Winkler constant; and m=the mass per
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Whole-body vibration and ergonomic study of US railroad locomotives

Journal of Sound and Vibration, 2006
Abstract US locomotive operators have exposure to multi-axis whole-body vibration (WBV) and shocks while seated. This study assessed operator-related and ergonomic seating design factors that may have confounding or mitigating influence on WBV exposure and its effects. Vibration exposure was measured according to international guidelines (ISO 2631-1;
Eckardt Johanning, Paul Landsbergis, Siegfried Fischer, Eberhard Christ, Benno Göres, Raymond Luhrman   +5 more
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Measurement of vibrations caused by railroad with fiber optic sensors

SPIE Proceedings, 2010
This paper presents the results of an investigation about the involvement of the tram vibration in nearby buildings. The overall objective is studying vibration generated in urban environments by tram, transmission to the ground and receiving them by the constructions of the environment.
A. Barreda, T. Molina, E. Valero, S. Recuero   +3 more
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Vibration-Isolation Treatment of a Railroad Track Bed

The Journal of the Acoustical Society of America, 1969
A few years ago, a half-mile section of railroad track was given a vibration-isolation treatment under several new buildings in Boston. The treatment consisted of welding all rail joints, inserting molded rubber rail seats under the lower flange of the rail, and installing an extra-deep ballast bed under the ties.
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