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车辆在实际线路运行的过程中,减振器会表现出复杂的动态特性,新减振器与服役过一段时间的减振器表现出的动态特性会有所变化,减振器不同安装长度也会表现出不同的动态特性。主要针对新的抗蛇行减振器与服役一段时间后的减振器以及不同安装长度时的动态特性分别进行了研究。结果表明:减振器在服役一段时间后,动态刚度、动态阻尼均有所下降(小幅值时比较明显),随着幅值的增大,二者之间的变化越来越小;不同安装长度时,随着长度增加,动态刚度、动态阻尼均有所减小,而动态阻尼在低幅以及高幅低频时,随着长度的减小而增大现象比较明显,在高幅高频时,动态阻尼变化不是很明显。
The vehicle in the actual operation of the line, the shock absorber will exhibit complex dynamic characteristics of the new shock absorber and served a period of time the dynamic characteristics of the shock absorber will change, shock absorber installed in different lengths Will show different dynamic characteristics. Mainly for the new anti-snake shock absorbers and service after a period of shock absorber and different installation length of the dynamic characteristics were studied. The results show that the dynamic stiffness and dynamic damping of the shock absorber decrease after a period of service (obvious in small amplitude), and the change between the two becomes smaller and smaller as the amplitude increases; When the length is increased, the dynamic stiffness and dynamic damping decrease as the length increases. However, when the dynamic damping is increased at low amplitude and high amplitude and low frequency, the increase with length is more obvious. At high amplitude and high frequency Dynamic damping changes are not obvious.