某重载汽车变速箱的振动模态分析

Vibration Modal Analysis for a Transmission of a Heavy Duty Car

变速箱是汽车的主要振动和噪声源之一,建立变速箱模态试验的理论模型和试验模型后,采用移动锤击法采集了各点的冲击数据和响应数据,进而得到了变速箱壳体的在关心频段内的固有频率,对其振动特性有了进一步的了解,为整个变速箱的减振降噪奠定了一定的基础。

Transmission is a major source of vibration and noise. The theoretical model and experimental model were established for modal test of the transmission. The mobile hammering impact method was used to collect input data and response data of all points. Then the nat- ural frequencies in the cared frequency band of the transmission＇ s shell were gotten. So its vibration characteristics were better understood. It lays a certain foundation for vibration and noise reduction of the entire transmission.