变速箱行星轮系的动力学仿真

为研究两挡变速箱行星轮系传动过程中的振动特性和轮系间轮齿动态啮合力的变化规律,利用Adams动力学软件建立变速箱行星轮系机构的动力学模型。根据变速箱的工作原理,对行星轮系的动力学行为进行仿真模拟,结果表明：行星轮系输出角速度和角加速度的曲线呈明显周期性,且仿真分析和理论结果的误差为0.6%,以此证明行星轮系仿真模型的正确性。由于轮齿啮合具有一定的周期性致使轮系振动也具有周期性的特点,输出振动角加速度在理论值0°/s²上波动。太阳轮和内齿圈分别与行星轮之间的动态啮合力主频率为2倍关系,太阳轮与行星轮径向、切向啮合力存在90°的相位差,行星轮系轮齿间的接触力满足力平衡关系,与理论分析相一致。

Dynamic Simulation of Gearbox Planetary Gear Train

In order to study the vibration characteristics of planetary gear train of two gearboxes and the dynamic meshing force between gearboxes, the dynamic model of planetary gear train mechanism of gearboxes was established by using Adams dynamic software. According to the working principle of gearbox, the dynamic behavior of planetary gear train is simulated. The results show that the curve of output angular velocity and acceleration of planetary gear train is obviously periodic, and the error of simulation analysis and theoretical results is 0.6%, which proves the correctness of the simulation model of planetary gear train. Because of the periodicity of gear meshing, the vibration of gear train is also periodic, and the angular acceleration of output vibration fluctuates on the theoretical value of 0°/s². The main frequencies of the dynamic meshing forces between the solar gear and the planetary gear are two times as much as those between the inner gear ring and the solar gear. The radial and tangential meshing forces between the solar gear and the planetary gear are 90 degrees different. The contact forces between the teeth of the planetary gear train satisfy the force balance relationship, which is consistent with the theoretical analysis.