Category of Derailment Mechanism and Prevention for High-Speed Vehicle
Publication: Journal of Transportation Engineering
Volume 137, Issue 10
Abstract
Vehicle derailment is difficult to explore because accidents are caused by many factors. In this paper, derailment behaviors are divided into three categories: friction-type derailment, structure-type derailment, and nonlinear-type derailment. Each category has unique characteristics. Wheel climb is a frequent form of friction-type derailment, resulting from mechanical and generally dynamical behavior between wheel and rail. Dynamic simulation is an important tool for prediction of friction-type derailment. There exists a critical point during wheel climb, and lateral normal force primarily prevents the wheel’s moving up. Structure-type derailment is a result of component failure, appearing as local, then developing into general derailment. Factors affecting the development process, such as failure modes, front wheelset derailment, and vehicle speed, are discussed. Nonlinear-type derailment commonly occurs as impact derailment when the vehicle loses stability beyond a nonlinear critical speed. The critical speed for derailment is derived, and the case of a bifurcation diagram is studied. Although nonlinear-type derailment is sensitive to initial conditions, the possibility of accurate prediction is discussed.
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Information
Published In
Journal of Transportation Engineering
Volume 137 • Issue 10 • October 2011
Pages: 730 - 737
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Mar 31, 2009
Accepted: Dec 13, 2010
Published online: Dec 15, 2010
Published in print: Oct 1, 2011
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