影响汽车振动特性的几个参数研究

建立汽车制动时的4自由度动力学模型,并利用仿真方法研究汽车动态特性.研究表明,即使当路面为简谐的情形,车身与轮子的振动均为非简谐的,甚至不是周期的.汽车的结构参数对其整车的振动影响是剧烈、不同和复杂的,合理选择有关结构参数,如距离l1、悬架弹簧刚度等,可以使车身的振动很小.道路表面的波长也会影响汽车的振动且扮演着变频激励的作用.

INVESTIGATION OF SOME PARAMETERS AFFECTING THE VIBRATIONAL CHARACTERISTICS OF AUTOMOTIVES

A dynamical model for an automobile while braking was established and the model was with four degrees of freedom. The dynamic characteristics about the automotive were investigated in a simulation way. It is found that even though the wavy surface is simply harmonic, all vibrations of the car body and wheels are not harmonic and even not periodic. The effects of the structure parameters of a car on vibrations of the automotive are severe, different and complicated to different parts of the automotive. Wise selection of some structure parameters such as the distance l_1,spring constants of suspension devices, etc,can make the vibrations of the car body small.The road wave length also affects the vibrations of the car and plays as an excitations of variant frequencies.