重型卡车八自由度振动模型建模与计算  

Modelling and Calculation of Heavy Truck Eight Degree Freedom Vibration

作　　者：马季 MA Ji(Weichai Power Co.,Ltd(Shanghai Office),Shanghai 200315,China)

机构地区：[1]潍柴动力股份有限公司上海分公司,上海200315

出　　处：《机械设计与制造》2018年第4期26-29,共4页Machinery Design & Manufacture

摘　　要：重型卡车是一个复杂的动力学系统,很难建立一个非常精确的模型,须根据具体情况进行简化。通过对组成重型卡车整车系统的驾驶室、动力总成、车架及货箱、车桥及轮胎进行离散化处理,并采用能量法建立起重型卡车八自由度系统振动数学模型,然后采用数学软件MATLAB的矩阵方法,对该多自由度振动模型进行固有频率求解。计算结果与试验结果基本吻合,验证了所建的数学模型和推导过程的正确性,为重型卡车多自由度振动系统的研究提供了一种行之有效的方法。Heavy truck is a complicated dynamic system.It is hard to establish an accurate model.The system must be simplified according to the instance.In this paper,the heavy truck which is made up of cab,power-train,frame,body,axle and tires is discretized.The Mathematical model of eight degree of freedom vibration of heavy truck is established by using the energy method.By using the matrix method in the mathematical software MATLAB,the natural frequency of the multi degree of freedom vibration model is solved.Compared with the experimental results,the outcome calculated by software met the need of engineering.The results of the comparison proved that the eight degree of freedom vibration model and the calculation process are correct.This mathematical model provides an effective method for the research of the multi degree of freedom vibration system of heavy truck.

关 键 词：能量法 八自由度 建模与计算 MATLAB 固有频率 特征值 

分 类 号：TH16[机械工程—机械制造及自动化] U461.4[机械工程—车辆工程]