车内噪声异常识别及系统优化  

Recognition of Abnormality of Interior Noise and System Optimization

作　　者：郑利锋 王铁[1] 李国兴[1] ZHENG Li-feng;WANG Tie;LI Guo-xing(Taiyuan University of Technology, Taiyuan 030024, China)

机构地区：[1]太原理工大学车辆工程系,太原030024

出　　处：《噪声与振动控制》2017年第5期115-118,169,共5页Noise and Vibration Control

基　　金：山西省科技重大专项资助项目(20111101035)

摘　　要：牵引车在主观评估过程出现车内噪声异常,在定置状态下进行扫频测试,对不同声源进行识别,确定发动机振动是引起车内噪声异常的主要原因。通过对动力总成悬置系统进行仿真分析,识别出悬置系统存在的问题,并给出优化方向。以悬置刚度为优化参数,以动力总成悬置系统主振动能量分布的加权组合作为优化设计的目标函数,给出优化后的悬置参数。最后,在相同测试条件下,对优化后的悬置系统进行测试,结果表明优化后的系统解决了车内噪声异常问题。The abnormality of interior noise of a tractor is found in a subjective evaluation process.Therefore,the sweeping tests of the tractor are operated in static condition.And the different noise sources are identified.It is found that the engine vibration is the main reason for the abnormality of the interior noise of the tractor.Through numerical simulation of the powertrain mounting system(PMS),the irrationality of the PMS is recognized and the orientation for optimization is given.Then,with the mounting stiffness as the design variable and the weighted combination of the main vibration energy distribution of PMS as the objective function,the optimal parameters of the mounting system are given.Finally,the optimized PMS is measured in the same testing condition.The test results show that the abnormality of interior noise is significantly improved after the optimization of PMS.

关 键 词：声学 车内噪声 系统优化 噪声异常识别 动力总成悬置系统 

分 类 号：U467.1[机械工程—车辆工程]