麦弗逊式前悬架系统整体强度分析

Strength Analysis of Integrated Mc Pherson Front Suspension System

针对汽车悬架系统的结构特点,结合有限元方法进行强度分析时计算结果的准确性有待提高的问题,本文以某轿车麦弗逊式前悬架系统为研究对象,提出了悬架系统整体结构的有限元分析方法,对副车架、控制臂、转向节、螺旋弹簧、减振器、稳定杆和连接销轴构成的多体系统进行整体建模、加载和有限元强度分析,并结合实际产品开发验证及与单件分析的有限元结果进行对比,研究结果表明整体分析有效克服了结构件分开计算时边界条件及载荷难以确定的问题,减少了因简化而造成的计算误差,对提高悬架系统结构件的设计开发具有一定的指导意义.

According to the structure characteristics of car suspension,on the basis of that the accuracy problem of strength analysis results on car suspension should be improved,a car Mc Pherson front suspension system was taken as an example. An integrated analysis method for the suspension was presented. The systematic modeling and load analysis for sub- frame,control arm,steering knuckles,coil spring,absorber,stablizer and connecting hinge shaft were developed. The strength finite element analysis for integrated Mc Pherson was performed,and test on actual product was conducted to validate the models. The difference between the analysis of suspension system and a single piece was compared. The results show that integrated analysis method of suspension system can effectively overcome the problem of boundary conditions and difficult to determine the load when calculated separately. It can significantly reduce the calculation errors caused by simplifying and can excellently guide the design of the structure for suspension system.