Dynamic roll instability analysis of heavy vehicles using energy approach
by P.J. Liu, S. Rakheja, A.K.W. Ahmed
International Journal of Heavy Vehicle Systems (IJHVS), Vol. 8, No. 2, 2001

Abstract: In this paper, roll plane models of heavy vehicles are proposed to study their dynamic rollover properties. Equations of motions are derived using an energy approach. These equations are considered valid until the vehicle approaches its tip-over position. Dynamic rollover indicators in terms of Rollover Prevention Energy Reserve Factor (RPERF) and Critical Distance Ratio (CDR) are discussed. Dynamic rollover limits of a straight truck subject to different evasive manoeuvres are investigated using the proposed energy approach and the indicators. The dynamic rollover limits predicted by RPERF are slightly smaller than those predicted by CDR. It is concluded that the dynamic rollover limit of a vehicle is manoeuvre dependent, and the rollover limits at relatively high steering frequencies are considerably larger than the corresponding static rollover threshold of the vehicle. The dynamic rollover limits of the vehicle approaches the SRT from the upper side as the excitation frequency decreases. The SRT thus provides an underestimate of the anti-roll ability of the heavy vehicles under transient steering manoeuvres.

Online publication date: Tue, 01-Jul-2003

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Heavy Vehicle Systems (IJHVS):
Login with your Inderscience username and password:

    Username:        Password:         

Forgotten your password?

Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email subs@inderscience.com