Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"Wheel-Rail Interaction"”.
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Experimental Evaluation of Wheel-Rail Interaction
… provides a detailed experimental evaluation of wheel-rail interaction for railroad vehicles, using the Virginia Tech Federal Railroad Administration (VT-FRA) Roller Rig. Various contact dynamics that emulate field application of railroad wheels on tracks are set up on the rig under precise, …
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The development of rail-head acoustic roughness
A model of the development of rail-head acoustic roughness on tangent track has been formulated. The model consists of a two-dimensional time domain wheel-rail interaction force calculation, with the normal force used as the input to a two-dimensional rolling contact and wear model. The possibility …
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Investigation of the finite element method for computing wheel/rail contact forces in steady curving
The understanding of rail vehicle steady-state and dynamic curving has increased substantially in the last few years. Contemporary curving models include such nonlinear effects as two-point contact, creep force saturation, and rail flexibility. The usual approximation concerning the contact …
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Vibration of railway bridges in the audible frequency range
… existing model is based on analytical models for wheel-rail interaction and the calculation of the power input to the bridge. The<br/>response of the various component parts of the bridge for this power input is found using a simplified SEA scheme.<br/><br/>In this work, the existing model has …
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A Wavelet-Based Rail Surface Defect Prediction and Detection Algorithm
Early detection of rail defects is necessary for preventing derailments and costly damage to the train and railway infrastructure. A rail surface flaw can quickly propagate from a small fracture to a broken rail after only a few train cars have passed over it. Rail defect detection is typically …
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Determination of load path through concrete crosstie and fastening system: a laboratory and field investigation
US railways move more freight (measured in tonne-kms) by rail than by any other means. This is done over an extensive network of primarily private freight railway lines that also transport passenger trains. To enable the expansion of high-speed passenger rail service using shared passenger/freight …
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Accurate Wheel-rail Dynamic Measurement using a Scaled Roller Rig
… and constructed by Virginia Tech and the Federal Railroad Administration (VT-FRA Roller Rig). The study also aims at determining the effect of naturally generated third-body layer deposits (because of the wear of the wheel and/or roller) on creep or traction forces. The wheel-rail contact forces, …
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Electromechanical Design and Development of the Virginia Tech Roller Rig Testing Facility for Wheel-rail Contact Mechanics and Dynamics
… sophisticated roller rig testing facility at the Railway Technologies Laboratory (RTL) of Virginia Polytechnic and State University (VT) is presented. The VT Roller Rig is intended for studying the complex dynamics and mechanics at the wheel-rail interface of railway vehicles in a controlled …
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Effect of Wheel and Rail Conditions on Contact Dynamics and Mechanics
This study uses the Virginia Tech – Federal Railroad Administration (VT-FRA) Roller Rig to assess how different running conditions affect the wheel-rail interface (WRI) dynamics and mechanics under repeatable and precise test settings. The advanced roller rig is used to emulate wheel loads, lateral …
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Understanding the vertical load path under static and dynamic loads in concrete crosstie and fastening systems
… of various parameters like loads, strains, rail seat pressure and displacements for the rail, pads, shoulders, ties were collected. Two sections of a track comprising of fifteen crossties each were chosen as test sections, one tangent section and one curved section. A TLV (Track Loading …