基于Sobol法的车身抬高量的全局敏感性分析  

Global sensitivity analysis of vehicle body lift based on Sobol method

作　　者：徐国辉 苗立东[1] 邹广德[1,2] 章曾 冯晓志 邹宏骏 吕少文 吴晓辉 石沛林 李波[1] XU Guo-hui;MIAO Li-dong;ZOU Guang-de;ZHANG Zeng;FENG Xiao-zhi;ZOU Hong-jun;LV Shao-wen;WU Xiao-hui;SHI Pei-lin;LI Bo(School of Transportation and Vehicle Engineering,Shandong University of Technology,Zibo 255049,China;College of Mechanical and Electrical Engineering,Shandong Management University,Jinan 250357,China)

机构地区：[1]山东理工大学交通与车辆工程学院,山东淄博255049 [2]山东管理学院机电学院,山东济南250357

出　　处：《广西大学学报（自然科学版）》2019年第2期332-338,共7页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(51505263)

摘　　要：为分析前轮转向时车轮中心主销拖距和车轮定位参数对车身抬高量的影响,建立了车身抬高量模型,并采用图形变换的方法进行求解,再应用改进的Sobol法对车身抬高量进行全局敏感性分析,比较了主销内倾角、主销后倾角、前轮外倾角、前轮前束角、车轮中心主销拖距对车身抬高量的贡献度。结果显示,车轮中心主销拖距、主销后倾角、主销内倾角对车身抬高量影响较大,其总效应指数分别达到0. 7323、0. 0270、0. 0219,说明车轮中心主销拖距是一个对车身抬高量影响较为明显的参数。In order to analyze the influence of the castor offset at wheel centre and wheel alignment parameters on the body lift during front wheel steering,a model of vehicle body lift was established.The model was solved by the graphic transformation method,and the global sensitivity of the body lift,and the contribution of the kingpin inclination,the caster angle,the camber angle,the toe angle,and the castor offset at wheel centre to the body lift were analyzed and compared by the improved Sobol method. The results show that the castor offset at wheel centre,the caster angle and the camber angle has greater influence on the body lift,and the total effect index reaches 0. 732 3,0. 027 0,and 0. 021 9,respectively. And it can be concluded that the castor offset at wheel centre is a parameter which has significant influence on the vehicle body lift.

关 键 词：前轮定位 车轮中心主销拖距 图形变换法 Sobol法 车身抬高量 

分 类 号：U463.45[机械工程—车辆工程]