纯电动汽车高速齿轮传动全工况抑振修形方法

Vibration Suppression Modification Method of Battery Electric Vehicle High-speed Gear Transmission under Full Working Conditions

为改善纯电动汽车齿轮传动在整个工况范围内的工作性能,提出一种计及负载扭矩和转速工况影响的齿面修形方法.考虑时变啮合刚度、啮合冲击、齿面摩擦激励,建立了系统动力学分析模型.结合轮齿几何接触分析和承载接触分析,采用遗传算法优化获得全工况最优的齿廓、齿向抛物线修形系数,并对比分析了不同修形方案的抑振效果.结果表明:计及工况影响的齿面修形在全工况下的振动加速度均方根都保持在较低水平,说明这一齿面修形策略具有更好的全局抑振效果.

To improve the performance of battery electric vehicle gear transmission over the entire range of operating conditions,a tooth surface modification method considering the influence of load torque and speed is proposed.The system dynamics analysis model is established considering time-varying meshing stiffness,meshing impact and tooth surface friction excitation.Combined with Tooth Contact Analysis(TCA)and Loaded Tooth Contact Analysis(LTCA),the optimal tooth profile and axial parabolic modification coefficient are obtained by genetic algorithm optimization for full working conditions.The vibration suppression effects of different modification schemes are compared and analyzed.Simulation results show that the root mean square of vibration acceleration of the tooth surface modification,that considering the influence of working conditions,remains at a low level under full working conditions,indicating that this strategy of tooth surface modification has better global vibration suppression effect.