摘要
汽车排气系统通过橡胶吊耳和挂钩与车身相连,合理的悬挂点布置能有效降低由排气系统传递到车身的振动,从而提高汽车的乘坐舒适性,降低车内噪声。通过对某乘用车的排气系统进行计算模态分析和试验模态分析,采用平均驱动自由度位移方法(ADDOFD)选择最佳的悬挂位置。为检验所设计悬挂点的合理性,对该排气系统进行静力分析和约束模态分析。计算结果表明,该排气系统满足强度要求,振动频率避开了发动机怠速和经济转速所对应的激励频率,证明所设计的悬挂点符合要求。
The exhaust system is connected with the vehicle body by hangers, and an appropriate hanger location can effectively reduce the energy transmission of vibration, which could improve the riding comfort and lower the interior noise. The method of average driving DOF displacement (ADDOFD) is used to select the optimum hanger location when completed the numerical modal analysis and experimental modal analysis from 0~150Hz. Static analysis and constraint modal analysis are carried out for the exhaust system based on the designed hanger location. The results indicate that the exhaust system could meet the requirements of strength and its vibration frequencies keep away from the excitation frequencies of the engine idle and that of the economical running speed. Therefore, it turns out that the designed hanger location is reasonable.
作者
黄志发
绕刚
王鸿杨
Huang Zhifa;Rao Gang;Wang Hongyang(China Automotive Engineering Research Institute Co. ,Ltd. Chongqing 401122,China)
出处
《工程与试验》
2019年第1期56-61,共6页
Engineering and Test
关键词
排气系统
悬挂点布置
模态分析
平均驱动自由度位移
静力分析
exhaust system
hanger location arrangement
modal analysis
average driving DOF displacement
static analysis
