某款SUV试验场工况下车门抖动问题分析与优化  

ANALYSIS AND OPTIMIZATION OF DOOR'S JITTER PROBLEM OF A CERTAIN SUV ON TEST FIELD

作　　者：张立强[1] 于双 胡帅 张松 ZHANG LiQiang;YU Shuang;HU Shuai;ZHANG Song(School of Mechanical and Electrical Engineering,Central South University of Forestry and Technology,Changsha 410004,China;State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body,Hu'nan University,Changsha 410006,China;Chang’an Oushang Automobile Institute,Chongqing 4QQQ23,China)

机构地区：[1]中南林业科技大学机电工程学院,长沙410004 [2]湖南大学汽车车身先进设计制造国家重点实验室,长沙410082 [3]重庆长安汽车欧尚研究院,重庆400023

出　　处：《机械强度》2020年第4期863-868,共6页Journal of Mechanical Strength

基　　金：湖南省自然科学基金项目(2018JJ2681)资助。

摘　　要：为研究某款SUV以(12~15)km/h速度行驶搓衣板路面时左后车门抖动问题,通过工作载荷试验与传递函数仿真相结合方法建立传递路径分析(TPA)模型。基于复刚度法求解底盘与车身间的连接点动载荷,同时CAE方法获取内饰车身(TB)有限元模型中连接点到左后车门目标点的传递函数,最后计算各传递路径对目标点的贡献量,将各传递路径的合成值与试验值进行对比,验证该TPA模型的可靠性。根据各路径贡献量大小找出后横向稳定杆左侧是左后车门抖动的主要传递路径,针对该传递路径的连接处动刚度进行结构优化来降低连接点振动传递率,结果表明抖动加速度峰值从8017 mm/s^2降到4236 mm/s^2。In order to study the jitter problem of the left rear door of a certain SUV on the washboard road with speed of(12~15)km/h,a transfer path analysis(TPA)model is established by combining the working load test with the transfer function simulation.Based on the complex stiffness method,the dynamic load of the connecting point between the chassis and the car body is obtained.At the same time,the transfer function of the left rear door of the Trimmed Body(TB)model is obtained by the CAE method.The contribution of each transfer path to the target point is calculated.The reliability of the TPA model is verified by compared the combined value of each transfer path with the experimental value.According to the contribution of each path,it is found that the left connection between the lateral stabilizer rod and the car body is the main transfer path.Then,the dynamic stiffness of the connection of the transfer path is optimized to reduce vibration transmission ratio.The result shows that the peak value of the jitter acceleration is reduced from 8017 to 4236(mm/s^2).

关 键 词：复刚度法 TPA模型 传递路径贡献量 动刚度 

分 类 号：U463.4[机械工程—车辆工程]