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Post-derailment dynamic simulation of rail vehicles - methodology and applications

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An earlier developed multi-body system post-derailment module, that predicts the wheelsets' behaviour after impact with concrete sleepers, is upgraded to account for possible wheel-rail fastener impact situations, after train derailments at high speed. The vertical stiffness describing the wheel-fastener impact behaviour is calibrated and validated based on two authentic derailment cases. Geometrical specifications that permit a brake disc and a bogie frame to act as substitute guidance mechanisms after flange climbing derailments on curved track are presented for an X 2000 trailer car. Further, an introductory analysis on the post-derailment vehicle behaviour on tangent track after a 'flange on rail head' derailment condition is also presented as a function of bogie yaw resistance. The risk of carbody overturning after derailments on tangent track is assessed as a function of coupler height and carbody centre of gravity as well as bogie transversal beam position.
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Keywords: MBS simulation; centre of gravity; derailment; overturning; train; wheel-sleeper impact

Document Type: Research Article

Affiliations: Division of Rail Vehicles, Royal Institute of Technology (KTH), Stockholm, Sweden

Publication date: 2008-09-01

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