故障行星轮系接触力仿真研究

Research on Simulation of Contact Force of Fault Planetary Gear Train

为获得故障行星轮系啮合传动时接触力的变化规律,运用pro/E与ADAMS建立故障行星轮系的动力学模型,结合Hertz接触理论的接触力计算方法,对故障行星轮系啮合传动时的接触力的变化规律及其频谱特征进行仿真研究。仿真结果表明:故障行星轮系的接触力在时域上具有显著的周期性冲击和明显的调制现象。在频域上,不仅出现了故障频率,而且在啮合频率及其倍频处出现了以故障频率为边频带的故障特征。同时,从频域中还可以看出:载波频率为啮合频率,调制频率为行星轮的公转频率。

In order to obtain the changing pattern of contact force of fault planetary gear train, pro/E and ADAMS were used to build the modal of fault planetary gear train and the computation method for contact force based on Hertz theory was also introduced, with the dynamic modal, the contact force and the frequen-cy spectrum of gear meshing were simulated. The simulation results show that the contact force of fault plan-etary gear train contains significant cyclical impact in time domain graph and obvious modulation phenome-non. In frequency domain, not only the failure frequency is found, but also fault characteristic that failure frequency stands for side band in meshing frequency and the frequency doubling is appeared. At the same time, As also can be seen from the frequency domain：the carrier wave is meshing frequency and the modu-lation wave is revolution frequency of the planet wheel.