中文摘要：

采用基于实测数据建立的非线性悬架模型，该文分析了汽车悬架中的阻尼力，对非线性悬架系统的混沌运动进行了研究。在单频正弦路面仿真计算得到了系统的响应。分析不同激励及幅值下系统的相轨迹、庞加莱截面、时间历程曲线、分岔图。结果表明非线性悬架系统中在一定条件下存在混沌现象，对车辆的稳定性有一定影响。

英文摘要：

using the nonlinear suspension model based on measured data of a vehicle, the nonlinear spring load and damping force in vehicle suspension are analyzed and the chaotic movement of the nonlinear suspension system is studied. A simulation is conducted under excitations of sine, the system responses are obtained. Based on these, the phase trace, Poincaure section and time history of system and bifurcation diagram under different excitations are analyzed. The results reveal that the chaos phenomena occur in nonlinear suspension system under special condition influence vehicle performance.