转向节疲劳寿命有限元分析和台架试验

Finite Element Analysis and Bench Test of Fatigue Life of Steering Knuckle

以某麦弗逊悬架中的转向节为研究对象,利用有限元分析的方法验证其是否满足设计要求,并采用台架试验验证分析结果的可靠性。结合转向节的疲劳试验条件,通过有限元分析的方法计算出转向节在规定工况下的静力学分析结果,再根据其材料属性,计算出其疲劳寿命。为验证分析结果,采用液压伺服疲劳试验系统进行转向节台架耐久试验。结果表明:有限元疲劳分析结果与台架试验结果相符合,验证了该分析方法对转向节的设计过程有参考作用,同时表明了该转向节结构需要进一步改进。

Taking the steering knuckle of a McPherson suspension as the research object,the finite element analysis method was used to verify whether it met the design requirements,and bench test was used to verify the reliability of the analysis results.The static analysis results of the steering knuckle under the fatigue test conditions were calculated by using finite element analysis method,and the fatigue life of the steering knuckle was calculated by combining with its material properties.In order to verify the analysis results,the hydraulic servo fatigue test system was used to carry out the steering knuckle bench endurance test.The results show that the results of finite element fatigue analysis are in good agreement with those of bench test,which indicates that the analysis method can be used as a reference for the design process of the steering knuckle,and the structure of the steering knuckle needs to be further improved.