Nonlinear ride analysis of heavy vehicle using local equivalent linearization technique
by A. Dhir, S. Sankar, R.B. Bhat
International Journal of Vehicle Design (IJVD), Vol. 13, No. 5/6, 1992

Abstract: A multi-degree-of-freedom ride model of a typical tractor-semitrailer configuration comprising of nonlinear suspension damping mechanisms is developed. A local equivalent linearisation technique based on energy balance is employed to obtain the ride response of the nonlinear vehicle model. The critical behaviour of vehicle suspension(s) lock-up due to high magnitude of Coulomb (dry) friction is modelled and incorporated in the analytical technique such that the nonlinear behaviour of the system can be effectively simulated by the equivalent linear system. The effectiveness of local equivalent linearisation technique is demonstrated by comparing it with respect to conventional numerical integration and statistical linearisation techniques. A comprehensive parametric study is performed to investigate the influence of vehicle suspension characteristics, vehicle geometry, speed, highway profile and trailer loading patterns.

Online publication date: Tue, 27-May-2014

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