基于悬架本征参数的商用车操纵稳定性分析
刘辉，闫安，韩振
山东交通学院汽车工程学院，山东 济南 250357
摘要：为了提高车辆操纵稳定性，分析影响车辆操纵稳定性的因素，采用降低前悬架参数高度、调整横向稳定杆外形和结构尺寸、降低钢板弹簧空载弧高等措施进行优化，基于ADAMS/Car软件创建整车动力学模型，仿真分析前悬架参数、横向稳定杆、后悬架参数优化前、后，车辆在稳态回转工况、转向盘角阶跃工况下的操纵稳定性。仿真结果表明：采用调整稳定杆径向截面直径的优化方案，车辆稳态回转工况下，随着侧向加速度增大，前、后轴侧偏角绝对值的差均大于0°，车辆未出现过度转向，减小车辆横向侧滑或甩尾风险，提高车辆操纵稳定性；最佳优化方案转向盘角阶跃工况横摆角速度响应时间为0.24 s，峰值响应时间为0.51 s，均满足行业要求。
关键词：操纵稳定性；动力学模型；优化设计；仿真分析
Analysis of commercial vehicle handling stability based on suspension inherent parameters
LIU Hui, YAN An, HAN Zhen
School of Automotive Engineering, Shandong Jiaotong University, Jinan 250357, China
Abstract：In order to improve vehicle handling stability, the factors affecting vehicle handling stability are analyzed, the optimization measures such as reducing the height of front suspension parameters, adjusting the shape and structural size of the transverse stabilizer bar, and reducing the height of the steel plate spring in no-load condition are adopted.Based on ADAMS/Car software, a full-vehicle dynamics model is created to simulate and analyze the handling stability the vehicle before and after the optimization of front suspension parameters, lateral stabilizer bar, and rear suspension parameters under steady-state cornering conditions and steering wheel angle step conditions. The simulation results show that by using the optimization scheme of adjusting the diameter of the stabilizer bar′s radial section, the absolute value of the difference between the front rear axle side slip angles under the vehicle′s steady-state cornering condition is greater than 0° as the lateral acceleration increases, and the vehicle does not show oversteer, which reduces the risk of vehicle lateral skidding or tail wagging and improves the handling stability of the vehicle. The response time of the yaw angular velocity under optimal optimization scheme steering wheel angle step condition is 0.24 s, and the peak response time is 0.51 s, which meets the industry requirements.
Keywords: handling stability; dynamics model; optimization design; simulation analysis
