位移相关减振器对车辆悬架特性的仿真研究

针对减振器在高频激励下存在的发热问题,提出了一种阻尼特性与位移相关的叶片式减振器,即在减振器静平衡位置设计附加通道,改变减振器的阻尼特性,以降低发热功率.利用MATLAB/Simulink建立了二自由度悬架振动模型,在特定频率的路面激励下针对不同的附加通道尺寸对车身加速度、悬架动挠度及减振器发热功率进行了仿真分析.结果表明：在车辆悬架上用阻尼特性与位移相关的减振器,可以有效地降低发热量.

Simulation on Suspension Characteristics of Absorber with Displacement-dependent Damping Property

In view of the heating problem in the absorbers under high-frequency vibration, a vane type absorber was proposed with a displacement-dependent damping property. At its static balance place of the absorber, an additional channel was designed for both changing its damping property and lowering the heating power. By means of MATLAB/Simulink, a 2 DOFs suspension model was built. Through changing the dimensions of the additional channel, the different values in the car-body acceleration, suspension dynamic deflection and the absorber＇ s heating power were obtained in the road excitation with specific frequencies. The results indicated that the absorber could effectively lower the heating power.