摘要
基于多体动力学理论,应用机械系统分析软件ADAMS/Car,建立了计及悬架下摆臂、纵向推力杆和横向稳定杆柔性的刚柔耦合整车模型,其中柔性杆件的模态通过有限元分析获得。对车身、下摆臂垂直加速度功率谱密度以及悬架动行程和轮胎动位移进行了分析,并与多刚体模型的仿真结果进行了比较。研究结果表明：与刚体模型相比,刚柔耦合的作用使车身垂直加速度功率谱密度的幅值降低了21.5%,下摆臂垂直加速度功率谱密度的峰值减小71.3%,轮胎动载荷减小约10%,悬架动行程增大15%-20%;刚柔耦合模型之间的差异随车速提高,悬架构件的柔性在汽车平顺性分析中不可忽视。
Based on multi-body dynamics, a whole car model with rigid-flexible coupling suspension that included the flexibility of lower arms and stabilizer bars was established by using ADAMS/Car software, and the flexibility of elements has been obtained with FEM. The analyses for the accelerations of floor and lower arm, the dynamic deflection of suspension, and the dynamic deformation were carried out. The research result showed that the PSD of vertical acceleration of body and the PSD of vertical acceleration of lower arm reduced by 21.5% and 71.3% respectively, compared with rigid model. In addition, the dynamic load of tire decreased by 21.5%, and the working space of suspension increased form 15% to 20%. The research result also showed that the difference between rigid body model and rigid-flexible coupling model rose with velocity. The analysis demonstrated that the flexibility of suspension components could not be neglected.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2008年第8期28-32,共5页
Transactions of the Chinese Society for Agricultural Machinery
基金
辽宁省教育厅资助项目(项目编号:05L182)
关键词
汽车
悬架
平顺性
多体动力学
刚柔耦合
Vehicle, Suspension, Ride comfort, Multi-body dynamics, Rigid-flexible coupling
