基于单目标解析法橡胶式扭转减振器建模分析

Modeling and Analysis of Rubber Torsional Vibration Damper Based on Single Analytical Method

扭转减振器是削减发动机扭转振动的重要装置,其可有效削减扭转振动对曲轴及动力传递系统其他机构的影响。采用传统双扭摆模型搭建扭转减振器的数学模型,应用单目标设计解析法对橡胶式扭转减振器的结构参数、转动惯量、阻尼和扭转刚度进行分析设计。运用MATLAB和ADAMS对安装扭转减振器前后传动轴在发动机典型工况下的扭振特性进行对比分析;对安装减振器的传动系统减振效果进行分析。结果表明:对于所研究的系统,安装橡胶式扭转减振器的传动轴扭振振幅在许用范围内波动均匀,保证传动轴的可靠安全运行;且在发动机临界转速和最大功率时,减振器将传动轴的扭振角位移控制在许用振幅以下,橡胶式扭振减振器能够达到更好的减振效果。

Torsional vibration damper is an important device for reducing torsional vibration af engine, which can effectively reduce the influences af torsional vibration on the other mechanism of the crankshaft and power-train system. Mathematical model of torsional vibration damper was built based on traditional double pendulum model. The structure parameters, the moment of inertia, the damping and the torsional stiffness of the rubber type torsional vibration damper were analyzed by using the single analytical method. The torsional vibration characteristics of the drive shaft with torsional vibration damper or not were analyzed and compared based on MATLAB and ADAMS, which under various engine working conditions. Vibration damping effect of torsional vibration damper in the power train system was analyzed. The results show that for the system, the vibration amplitude of the drive shaft with the rubber type torsional vibration damper is in the allowable range and wave uniform which is used to ensure the reliable and safe operation af the system. And when the engine is working in the critical speed and the maximum power, the vibration damper will control the torsional vibration angle of the drive shaft in the allowable amplitude, and the rubber torsional vibration damper can achieve better vibration isolation effect.