Nonlinear Safety Analysis of a Running Road Vehicle under a Sudden Crosswind
Publication: Journal of Transportation Engineering
Volume 142, Issue 2
Abstract
Threats of wind gusts on the safety of road vehicles have been reported around the world, and extensive studies have been carried out to find the accident speeds of road vehicles under a sudden crosswind. However, most previous studies assume that the angular displacements of the vehicle are small and the mass moments of the vehicle remain unchanged during the overturning of the vehicle, yielding a quasi-linear safety analysis of a road-vehicle under a sudden crosswind. This study aims at a nonlinear safety analysis of a running road vehicle under a sudden crosswind by establishing nonlinear equations of motion of a wind-vehicle system. The assumptions adopted in the previous studies are no longer required, and tires can lose or resume contact with the ground. Wind loads on the vehicle are updated with the consideration of the time-varying attitude of the vehicle. The numerical example shows that the proposed nonlinear analysis procedure is more rational than the currently used approaches for progressive instability and the accident vehicle speed of road vehicles.
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Acknowledgments
The authors wish to acknowledge the financial support from the open project of the Transport Industry Key Laboratory for Wind Resistance Technique in Bridge Engineering (KLWRTBMC14-02) to the first author, the Research Grants Council of the Hong Kong (PolyU 5311/07E) to the second author, and the Applied Basic Research Projects of the Ministry of Transport (2014319J13100) and the Sichuan Province Youth Science and Technology Innovation Team (2015TD0004) to the third author.
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Published In
Journal of Transportation Engineering
Volume 142 • Issue 2 • February 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Feb 20, 2015
Accepted: Aug 31, 2015
Published online: Nov 4, 2015
Published in print: Feb 1, 2016
Discussion open until: Apr 4, 2016
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