侧向力作用下二自由度车辆动力学仿真

Dynamics Simulation of Two-Degree-of-Freedom Vehicle Under Lateral Force

用滤波白噪声法建立路面时域模型作为系统输入,建立侧向力作用下横向载荷转移量模型,结合整车二自由度模型,利用MATLAB软件分析横向载荷转移对整车平顺性的影响。分析表明,侧向力作用对车身加速度、悬架动行程变化频率、轮胎动载荷突变程度影响较大。

In this paper, the white noise filtering method is used to establish the pavement time-domain model as the system input and the lateral load transfer model under the action of lateral force. Then, MATLAB software is used to analyze the impact of lateral load transfer on the ride comfort according to the two-degrees-freedom model of the vehicle. The analysis shows that the lateral force has the greater influence on the acceleration amplitude of body, dynamic change frequency of suspension and abrupt change of dynamic load of tyre.