整车刚柔耦合建模及随机激励下的平顺性分析  

Ride Comfort Analysis Based on Rigid-Flexible Coupling Vehicle under Random Excitation

作　　者：范国栋[1] 吴光强[1,2] 郑红[1] 

机构地区：[1]同济大学汽车学院,上海201804 [2]东京大学生产技术研究所

出　　处：《佳木斯大学学报（自然科学版）》2011年第4期486-490,499,共6页Journal of Jiamusi University：Natural Science Edition

基　　金：国家863项目(2007AA04Z132);国家973重点基础研究发展计划项目(2011CB711201);上海汽车工业科技发展基金会项目(201007)资助

摘　　要：基于多体动力学理论、有限元及模态综合法,建立了某轿车的整车刚柔耦合动力学模型,其中包括前悬架、转向系等刚体子系统及后悬架柔体子系统.建立B级随机路面模型,采用该数字化试验道路对整车的平顺性进行仿真计算,得到不同车速下的车身质心处垂向加速度以及驾驶员座椅坐垫上方、座椅靠背以及脚支撑面处的加权加速度均方根值.结果表明,所建的刚柔耦合整车模型正确,该轿车的平顺性良好.Based on multi-body system dynamics,combining the finite element and modal synthesis methods,a rigid-flexible coupling whole vehicle model was established,including several rigid subsystems such as front suspension,steering system as well as the flexible rear suspension.The 3-D digitalized B-level test road was established.The simulation on the ride comfort was carried out,and the vertical acceleration of the center of mass and weighted root mean square of the accelerations on the seat cushion,seat back and the floor supporting the feet were calculated at different speeds.The results show that the rigid-flexible coupling vehicle model is proved to be valid and its ride comfort is satisfactory.

关 键 词：多体动力学 刚柔耦合 数字化试验道路 平顺性 

分 类 号：U462[机械工程—车辆工程]