激励参数对2K-H行星轮系动态响应的影响

Impacts of Exciting Parameters on 2K-H Planetary System Dynamic Response

采用集中质量法构建了混合动力汽车行星齿轮减速机构多自由度弹性动力学模型。在综合考虑时变啮合刚度、综合齿频误差以及齿侧间隙激励条件下,借助自适应变步长五阶Runge-Kutta法求解该多自由度振动系统的非线性动力学方程。通过位移和动载荷的时间历程、相图、FFT、Poincaré映射等途径,获得了系统的动态响应和齿间动载特性,并分析了系统各激励参数对动态响应的影响。结果表明,激励频率、齿侧间隙、外载荷等激励参数对系统动态响应影响巨大。

Elastodynamics model of multi-DOF system for planetary mechanism in the hybrid electric vehicle was founded by the method of lumped mass.The nonlinear dynamics equations of vibration system with the excitation of time-varying mesh stiffness,gear composite errors and clearances were solved by the method of the 5-steps self-adaptive Runge-Kutta.As a result,the dynamic response and behaviors of dynamic load between teeth of the system were acquired by combining with displacement or dynamic load,phase plane,FFT,Poincaré mapping.Then,impacts of exciting parameters on system dynamic responses were analyzed.The numerical results indicate that frequency,backlash or external load has huge influence on system dynamic response.