摘要
围绕新能源汽车电机控制器振动试验的振动失效问题,采用频谱分析等方法,进行了失效原因分析,结果表明,振动耦合是振动放大并导致失效的主要原因。针对该失效进行了优化方案设计,采用倍频程准则设计结构模态避免振动耦合,以及增加阻尼降低振动响应峰值。并且对优化方案进行了仿真和试验验证分析,结果表明,采用倍频程准则避免振动耦合可以将振动加速度降低约23%~31%;增大阻尼可以使振动量级进一步降低25%~34%。由此可知,两种优化方法可以明显地降低振动加速度,使产品疲劳耐久性能得到提升。
The vibration failure issue of the motor control unit during the vibration test was studied,and the reasons of the failure were analyzed by applying spectrum analysis method,the results showed that the coupled vibration is the main reason of the vibration failure.The optimization schemes against this problem were designed,the octave criterion was applied to design the component for avoiding coupled vibration,and the damping was increased to decrease the peak of the vibration response.The optimization schemes were verified by simulation and experiment,the results showed the vibration acceleration decreased by 23%~31%using octave criterion design,and decreased by 25%~34%through increasing damping.The conclusion can be drawn that two optimization ways can decrease vibration acceleration level obviously,and the fatigue durability of the product was improved.
作者
卢钢
陈建明
沈丁建
毛鸿锋
LU Gang;CHEN JianMing;SHEN DingJian;MAO HongFeng(Zhuzhou CRRC Times Electric Co.,Ltd.,Zhuzhou 412001,China)
出处
《机械强度》
CAS
CSCD
北大核心
2020年第4期1000-1006,共7页
Journal of Mechanical Strength
关键词
新能源汽车
电机控制器
振动疲劳
耐久性
阻尼
New energy vehicle
Motor control unit
Vibration fatigue
Durability
Damping
