行星齿轮传动机构动力学分析  

Dynamic Analysis of Planetary Gear Mechanism

作　　者：赵玉香[1] 孙首群[1] 朱卫光[1] 

机构地区：[1]上海理工大学机械工程学院,上海200093

出　　处：《机械传动》2008年第4期69-71,75,共4页Journal of Mechanical Transmission

基　　金：上海市教育委员会自然科学研究发展基金资助(No05E244);上海市重点学科建设项目(NoJ50503)

摘　　要：针对混合动力汽车行星齿轮减速机构,采用集中质量法构建其多自由度系统的动力学模型。在时变啮合刚度和齿频误差激励下,将多自由度振动系统的动力学方程转化为系统的状态方程和传递函数方程。采用变步长四阶Runge-Kutta法及机械阻抗法,借助MATLAB仿真工具箱,对振动系统进行了时域和频域数值仿真,获得了系统的动态响应和齿间动载特性。仿真结果表明,太阳轮浮动改善了齿间动载,使其在各行星轮上的分布趋于均匀;刚度波动幅值越大,系统振动越严重。The method of lumped mass was adopted to found dynamic model of multi-DOF system for planetary mechanism in the hybrid electric vehicle.The dynamic equation of vibration system with multi-DOF was transferred to its state equation and transfer function equation with the excitation of time-varying mesh stiffness and gear composite errors.The numerical simulations of the vibration system in time domain and frequency domain were carried out by the method of the 4-steps Runge-Kutta and the mechanical impedance analysis method with MATLAB simulation toolbox.As a result,the dynamic response and behaviors of dynamic load between teeth of the system were acquired.The numerical results indicate that the floatation of sun gear can improve the behaviors of dynamic load between teeth.And the greater the amplitude of stiffness varies,the more heavily the system vibrates.

关 键 词：行星齿轮 传动机构 动力学分析 数值仿真 

分 类 号：TH132.41[机械工程—机械制造及自动化]