某重型载重车辆振动分析和控制

Vibration Analysis and Control of Heavy Truck

为了有效消除某重型载重车的驾驶室水平晃动,对车架和驾驶室悬置进行了综合有限元模态分析,分析了载重车驾驶室和车架的前6阶固有频率及模态振型特征。结合试验测试的路面激振信号分析,对车架有限元模型进行了动力优化。实际结果表明,驾驶室侧向弯曲模态固有频率与路面随机激励频率错开3～4Hz后,减小了驾驶室的横向振动,改善了该型载重车的平顺性。

To eliminate the transverse vibration of a heavy truck effectively,a finite element modal analysis system is applied to the vehicle frame and cab mounting.The first 6 natural frequencies and modes are analyzed.Combining the analysis of measured road exciting signals,the finite element model of the vehicle frame is optimized according to the dynamic design.The result shows that when the natural frequency of the cab transverse bending mode is shifted with 3～4 Hz from the road exciting frequency,the cab transverse vibration is reduced,and the ride comfort of the truck is improved.