人字齿行星传动多体动力学建模与分析

Multibody Dynamic Modeling and Analysis of Double Helical Planetary Gear Train

根据人字齿行星传动的结构特点,借助ADAMS建立该类传动的多体动力学模型,对其进行自由振动特性分析。结果表明,当人字齿轮左右两部分结构完全对称时,人字齿行星传动存在中心构件扭转振动、中心构件平移振动和行星轮振动3种典型模式,且3种振动模式的特点与直齿行星传动基本一致。在不考虑传动件结构柔性的情况下,基于多体动力学模型的自由振动分析结果与采用集中参数模型的仿真结果完全一致,表明本文所建模型的正确性,可为后续的参数敏感度分析及动响应分析提供模型依据。

According to the structural features of double helical planetary gear train（DHPGT）, a multibody dynamic model for DHPGT was proposed to investigate the free vibration characteristics with the help of ADAMS. The results reveal that when the structure of the herringbone gear is symmetric, the free vibration of DHPGT can be classified into three categories. i.e., the central components rotational mode, the central components translational mode and the planet mode, which are basically the same with the spur planetary gear train. The simulation results agree well with previous lumped parameter model when neglecting the component flexibilities, which proves the correctness of the proposed multibody dynamic model, thus can provide a modal basis for the parametric sensitivity and dynamic responses analysis.