汽车悬架控制臂拉压溃分析及疲劳寿命预测

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振动与冲击 ›› 2016, Vol. 35 ›› Issue (20) : 41-46.

论文

汽车悬架控制臂拉压溃分析及疲劳寿命预测

王红民1 谢锋1 郑国峰1 王小莉1 上官文斌1 俞宏2

作者信息 +

The collapse analysis of the vehicle suspension control arm and fatigue life prediction

Hong-Min Wang1 Feng Xie1 Guo-Feng Zheng1 Xiao-Li Wang1 Wen-Bin Shangguan1 Hong Yu2

Author information +

文章历史 +

摘要

以某汽车的后悬架上控制臂为研究对象，建立悬架控制臂有限元仿真模型。对悬架控制臂在拉、压工况下，进行拉溃力和压溃力分析，并进行试验验证。试验结果表明，该控制臂拉、压溃试验结果与有限元分析结果基本一致。通过对该控制臂进行有限元分析，提取危险部位的应力应变信息建立疲劳损伤参量，引入临界平面法建立疲劳寿命预测模型。运用该模型进行疲劳寿命分析与预测，并进行试验验证。疲劳试验结果表明，控制臂疲劳寿命的平均试验值与预测值比较贴近，说明本文所采用的疲劳损伤模型，可以应用于汽车金属零部件的疲劳寿命预测上。

Abstract

Taking the upper control arm of one vehicle as an objective, the finite element model has been established in this paper. The collapse analysis based on the finite element model under tension and compression condition has been conducted, and the corresponding test has been finished to verify the result of finite element analysis. It is shown that the test and finite element analysis of the collapse to the control arm are basically identical. The stress and strain information of the fatigue hot point has been extracted from the finite element analysis results to establish the damage parameter. The fatigue life prediction by using the damage parameter based on the critical plane approach has been introduced to the control arm, and the fatigue test has been conducted as well. The average life of the test is close to the prediction life indicating that the fatigue life prediction model can be used to the fatigue life prediction of the metal components of vehicle.

导出引用

王红民1 谢锋1 郑国峰1 王小莉1 上官文斌1 俞宏2. 汽车悬架控制臂拉压溃分析及疲劳寿命预测[J]. 振动与冲击, 2016, 35(20): 41-46

Hong-Min Wang1 Feng Xie1 Guo-Feng Zheng1 Xiao-Li Wang1 Wen-Bin Shangguan1 Hong Yu2. The collapse analysis of the vehicle suspension control arm and fatigue life prediction[J]. Journal of Vibration and Shock, 2016, 35(20): 41-46

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