带有橡胶扭转弹簧传动系统动力学建模与振动仿真分析

Modeling and Vibration Simulation Analysis of Transmission System Dynamics with Rubber Torsion Spring

传动系统平稳工作是提升车辆NVH性能的关键,也是车辆振动噪声控制的基础。扭转振动是传动系统经常出现的一种振动形式,它不仅会加剧传动系统的振动,还会造成零部件的疲劳失效问题,因此,对传动系统的扭转振动研究成为了当前的研究热点。文章采用数学建模与动力学仿真分析方法,研究了传动系统的振动特性,并对橡胶扭转弹簧的扭转刚度进行了优化分析。分析结果表明:在38.8 Hz和59.6 Hz附近,激励频率与传动系统的固有频率吻合,导致传动系统发生共振;通过对橡胶扭转弹簧的扭转刚度进行优化,能够明显提升传动系统的NVH性能,并降低了传动系统发生共振的风险。此研究结果为传动系统扭转振动的机理分析与振动控制提供了理论基础与参考。

The smooth operation of transmission system is the key to improve the NVH performance of vehicle,and is the basis of vehicle vibration and noise control.Torsional vibration is a common vibration form in transmission system,it not only aggravates the vibration of transmission system,but also causes the fatigue failure of components.Therefore,the research on the torsional vibration of the transmission system has become a hot spot.In this paper,the vibration characteristics of the transmission system are studied by mathematical modeling and dynamic simulation,and the torsional stiffness of the rubber torsion spring is optimized.The results show that the excitation frequency agrees with the natural frequency of the transmission system at 38.8 Hz and 59.6 Hz,which leads to the resonance of the transmission system.By optimizing the torsional stiffness of the rubber torsion spring,the NVH performance of the transmission system can be improved obviously and the risk of resonance of the transmission system can be reduced.The results provide theoretical basis and reference for mechanism analysis and vibration control of torsional vibration of transmission system.