摘要
文章介绍了基于实测试验场道路载荷谱进行动力总成壳体疲劳寿命预测的方法,通过三向加速度传感器实测可靠性试验路面上动力总成壳体悬置点位置载荷谱数据,应用n Code Designlife进行有限元分析软件,考虑对材料的S-N曲线进行修正,进行动力总成壳体模型疲劳寿命仿真预测。根据预测的结果,得出动力总成壳体方案满足疲劳寿命仿真要求的结论。并且得到的疲劳寿命云图,可以发现疲劳寿命薄弱位置,为结构设计和优化提供了一定的参考依据。该方案通过了整车可靠性试验,验证了有限元分析的正确性。
A fatigue analysis method of powertrain shell was introduced which was based on the measured road spectrum.The load spectrum data could be obtained by Three-way acceleration sensor when the truck ran on the test road.The fatigue life of the structure was analyzed by nCode finite element analysis software.And the modification of the s-n curve of the material should be considered.It was concluded that the powertrain shell scheme met the requirements of fatigue life by simulation results.The weak position was found which provided a good reference for the structure design and optimization of parts.Through the reliability test of the vehicle,the correctness of the finite element analysis is verified.
作者
翟文涛
崔勇奎
李瑞
Zhai Wentao;Cui Yongkui;Li Rui(College of Automotive Engineering TongjiUniversity,Shanghai 201804;China FAW Co.,Ltd R&D Center,Jilin Changchun 130011)
出处
《汽车实用技术》
2018年第6期46-48,共3页
Automobile Applied Technology
关键词
动力总成壳体
载荷谱
疲劳分析
有限元分析
powertrain shell
load spectrum
fatigue analysis
finite element analysis
