直联电驱动桥壳模态灵敏度分析及优化设计
Modal Sensitivity Analysis and Optimization Design of Direct-Connected Electric Drive Axle Housing
杨明政 1陈长征 1金毓林 1田国才2
作者信息
- 1. 沈阳工业大学机械工程学院,辽宁 沈阳 110870
- 2. 辽宁曙光汽车集团股份有限公司,辽宁 丹东 118000
- 折叠
摘要
为提高纯电动汽车电驱动桥壳低阶模态频率,对直联电驱动桥壳进行模态灵敏度分析及优化设计.首先,建立直联电驱动桥壳的仿真模型,进行了模态分析获得前六阶模态频率并与桥壳锤击试验结果进行对比,以验证仿真模型的可信性.其次,选取桥壳各截面壁厚为设计变量,运用差分法计算桥壳模态频率对设计变量的灵敏度.然后,据桥壳模态灵敏度分析结果选取变量进行优化,以提高桥壳低阶模态频率为目标,质量与最大位移为约束,进行优化设计.最后,针对优化后桥壳进行了强度与刚度校核.研究结果表明:直联电驱动桥壳通过模态灵敏度分析后选取的设计变量,经优化设计后低阶模态频率约提高了12Hz,优化效果显著.
Abstract
In order to improve the low order modal frequency of electric drive axle housing of pure electric vehicle,the modal sensi-tivity analysis and optimization design of direct electric drive axle housing are carried out.Firstly,the simulation model of the di-rect-connected electric drive axle housing is established,and the first six modal frequencies are obtained by modal analysis and compared with the results of the axle housing hammer test to verify the credibility of the simulation model.Secondly,the thickness of each section of the bridge shell is selected as the design variable,and the difference method is used to calculate the sensitivity of the modal frequency of the bridge shell to the design variable.Then,according to the modal sensitivity analysis results of the bridge shell,the variables are selected for optimization,and the optimization design is carried out with the goal of improving the low-order modal frequency of the bridge shell and the constraint of mass and maximum displacement.Finally,the strength and stiffness of the optimized bridge shell are checked.The results show that the design variables selected after modal sensitivity analy-sis of the direct-connected electric drive axle housing increase the low-order modal frequency by about 12Hz after optimization de-sign,and the optimization effect is significant.
关键词
纯电动汽车/直联电驱动桥壳/灵敏度分析/模态频率/优化设计Key words
Pure Electric Vehicle/Direct-Connected Electric Drive Axle/Sensitivity Analysis/Modal Frequency/Optimization Design引用本文复制引用
出版年
2023
NETL
NSTL
维普
万方数据