履带车辆振动谱测试与分析方法研究

Vibration Spectrum Measurement and Analysis of Track Vehicle

分析了引起履带车辆振动的主要因素,建立了车辆运动过程动力学模型,分析了车速、路面激励与车辆振动谱三者之间的关系。通过对典型测点的振动加速度信号分析,得出影响该履带车辆振动的主要因素是行动部分传到车体的振动,与车速密切相关,而由动力传动系统传到车体的振动相对较小。在履带车辆减振设计时应主要考虑由车速引起的工作频率与车辆固有频率的耦合问题,同时改变车体多个局部构件的固有频率重叠亦可消除共振耦合现象,减小车体的振动量级,改善车辆人-机环境。

The cause of a tracked vehicle vibration was analyzed. The relationship among the vehicle speed,the road input and the vibration spectrum was analyzed by using a kinetics modeling. By measuring and analyzing vibration acceleration signals from the typical measuring points on the body of track vehicle,it was derived that the vibration of track vehicle was mainly transferred from undercarriage,and the vibration degree was correlated nearly with the vehicle speed,while the vibration induced by the power train was low. So in the vibration reduction and optimization design,the coupling of working frequency and natural frequency should be considered mainly. Changing the natural frequency overlap of local components of vehicle body can eliminate the resonant coupling phenomenon and decrease the vibration degree and help to improve man-machine-environment system of the vehicle.