重庆大学学报2025，Vol.48Issue(7)：38-49,12.DOI:10.11835/j.issn.1000-582X.2023.232
前副车架对整车操纵稳定性的影响分析及优化
Analysis and optimization of the effect of front subframe on the handling stability of the whole vehicle
摘要
Abstract
Vehicle handling stability is an important part of the vehicle performance.In the vehicle suspension and subframe system,subframe is often studied as a rigid connection,however,the front subframe undergoes elastic deformation in actual driving process.Therefore,this paper flexibly treats the front subframe of a certain vehicle and establishes a rigid-flexible coupled vehicle model to study the handling stability of the whole vehicle.The lateral dynamics of the whole vehicle is analyzed,the three-degree-of-freedom vehicle kinematics equations are derived,and the vehicle kinematics simulation is conducted for comparative analysis to study the influence of the front subframe flexibility on the KC characteristics of the suspension system and the transient handling stability of the whole vehicle.The NSGA-II algorithm is applied to optimize the bushing stiffness at the front subframe joint,which improves the transient handling stability of the whole vehicle.The optimization results show that at 0.5 Hz,the yaw rate gain relative to the steering wheel angle is reduced by 8%,the body roll angle relative to the lateral acceleration gain is reduced by 1.1%,and the lateral acceleration delay time relative to the steering wheel angle is reduced by 10.5%.关键词
前副车架/刚柔耦合/有限元分析/瞬态操纵稳定性/多目标优化Key words
front subframe/rigid-flexible coupling/finite element analysis/transient handling stability/multi-objective optimization分类
交通工程引用本文复制引用
高晋,刘伟..前副车架对整车操纵稳定性的影响分析及优化[J].重庆大学学报,2025,48(7):38-49,12.基金项目
国家自然科学基金资助项目(51965026).Supported by National Natural Science Foundation of China(51965026). （51965026）
