Indian Journal of Science and Technology

Abstract

Chaos is harmful for a nonlinear mechanical system. For a vehicle, chaotic vibrations may lead to early damage to the component of vehicle or even bring physical injury to crewmember. In this paper, first a two degree-of-freedom quarter car nonlinear model with nonlinear air springs and nonlinear dampers is established then studied the possibility of chaotic vibration of this model under consecutive speed control humps on the highway, the nonlinear dynamics is investigated by numerical simulation. It reveals that various forms of vibrations, such as periodic, quasi-periodic and chaotic vibrations, could appear in the system with the change of the velocity. Further it is found that quasi-periodic motions will affect vehicle ride comfort most. Results are conductive to deep understanding of nonlinear vibration in vehicle.