Results 131 to 140 of about 326 (155)
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A vibration technique for measuring railroad rail stress
The Journal of the Acoustical Society of America, 2002Longitudinal 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), 2006The 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 +3 more
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Utilization of Waste Tires to Reduce Railroad Vibration
Materials Science Forum, 2007This study proposes a means to recycle waste tires as a material to reduce ground vibration. A series of field experiments was carried out to assess the reduction effect of railroad transport vibration by utilizing waste tire chips. The ground vibration during the railroad transport operation was measured in two railroad lines to investigate the ...
Sam Deok Cho +3 more
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Measurement of vibrations caused by railroad with fiber optic sensors
SPIE Proceedings, 2010This 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 +3 more
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A vibration prediction model for culvert-type railroad underpasses
Engineering Structures, 2018Abstract 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. +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, 2015An 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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Vibrational and acoustical response of a railroad bridge with vehicle loading
The Journal of the Acoustical Society of America, 2011A finite element model has been developed for a Pratt truss railroad bridge located at Ft. Leonard Wood, MO. This model was used to investigate the vibration responses of the bridge under vehicle loading. Modeling results have been obtained for a single axle with two wheels traversing the bridge at different speeds. Superposition of multiple axles have
R. Daniel Costley +2 more
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Response of Infinite Railroad Track to Vibrating Mass
Journal of Engineering Mechanics, 1988The 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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Vibration-Isolation Treatment of a Railroad Track Bed
The Journal of the Acoustical Society of America, 1969A 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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Vibration and shock exposure of maintenance-of-way vehicles in the railroad industry
Applied Ergonomics, 2011The aim of this study is to investigate and compare vibration and shock measurements of maintenance-of-way vehicles used in the railroad industry for track maintenance and construction. Following international standards (i.e., ISO 2631-1: 1997) and professional guidelines the frequency weighted root-mean-square (r.m.s.) acceleration for each ...
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