某轻卡变速箱发动机及车架模态测试与分析  

Modal Test and Analysis of the Engine,Gearbox and Frame of a Light Truck

作　　者：王俊元[1] 李伟伟[1] 马维金[1] 张纪平[1] 

机构地区：[1]中北大学机械与动力工程学院,山西太原030051

出　　处：《机械传动》2017年第5期123-126,共4页Journal of Mechanical Transmission

基　　金：山西省自然科学基金(2015011063)

摘　　要：采用锤击模态测试方法对发动机、变速箱及车架模态进行了测试,并获得模态参数。通过对截取的空车搓板路上各测点振动信号以及空车在障碍路上工作时各测点振动信号进行工作模态测试分析,获知轻卡在空载工作环境中的各阶工作模态参数。最后,对试验结果进行了总结分析,发现几个较为敏感的模态频率。为下一步从完整的动态特性方面分析判断发动机、变速箱及车架破损的根本原因,提供理论及技术支持。The modal of engine, gearbox and frame are tested by the method of hammer excitation, and the modal parameters are obtained. Through interception the vibration signals when the empty light truek on washboard road and obstacles road, the modal test analysis of the vibration signal is carried out, the modal pa- rameters of different stages of the light truck in the working environment are obtained. Finally, the test results are summarized and analyzed, several sensitive modal frequencies are found. Those found would provide theory and technical support for further study on dynamic analysis to estimate the basic reason of the damaging of the engine, gearbox and the frame.

关 键 词：工作模态 试验模态 模态振型 

分 类 号：U467[机械工程—车辆工程]