摘要
针对某轿车在试车场进行耐久性试验时出现挂钩处开裂的问题,建立考虑动力总成的排气系统振动分析模型;通过频率响应分析发现挂钩开裂处的约束反力稍大,局部刚度偏低;通过结构优化使挂钩刚度得到加强.对2种优化方案的对比表明优化后的挂钩能减小排气系统传递到车身地板的振动,提高排气系统的疲劳寿命.
As to the problem that the cracking around a car exhaust pipe hook occurs after durability test in proving ground,an exhaust system vibration analysis model is built considering power assembly;according to the frequency response analysis,it is found that the constrained force on the hook that is cracked is bigger and the local stiffness is lower;and the hook stiffness is strengthened by structure optimization.The comparison of the two optimization schemes indicates that the optimized hook can reduce the vibration of the exhaust system that transfers to the car floor and improve the fatigue life of the exhaust system.
出处
《计算机辅助工程》
2012年第2期18-20,24,共4页
Computer Aided Engineering
关键词
排气管
挂钩
疲劳
振动
频率响应
exhaust pipe
hook
fatigue
vibration
frequency response
