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International Journal of Automotive Technology > Volume 8(1); 2007 > Article
International Journal of Automotive Technology 2007;8(1): 33-38.
CHAOTIC THRESHOLD ANALYSIS OF NONLINEAR VEHICLE SUSPENSION BY USING A NUMERICAL INTEGRAL METHOD
D. ZHUANG1, F. YU1, Y. LIN2
1Shanghai Jiaotong University
2Beijing Institute of Technology
ABSTRACT
Since it is difficult to analytically express the Melnikov function when a dynamic system possesses multiple saddle fixed points with homoclinic and/or heteroclinic orbits, this paper investigates a vehicle model with nonlinear suspension spring and hysteretic damping element, which exhibits multiple heteroclinic orbits in the unperturbed system. First, an algorithm for Melnikov integrals is developed based on the Melnikov method. And then the amplitude threshold of road excitation at the onset of chaos is determined. By numerical simulation, the existence of chaos{{br}}in the present system is verified via time history curves, phase portrait plots and Poincar
Key Words: Melnikov function, Numerical integral method, Chaotic motion, Nonlinear suspension system
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