行星轮齿根裂纹动力学建模与振动响应特征分析

摘要

In order to study the evolution mechanism of the main fault cracks in the planetary rotation system and its dynamic influence on the system, it describes the mathematical description method of the planetary wheel crack failure in the planetary rotation system, establishes the calculation model of gears meshing stiffness during crack failure.Based on the planetary shift-torsional coupling dynamics model, it obtains the system vibration response of the planetary wheel gear tooth crack.The analysis of the response characteristics and the vibration response show the changing rules of the frequency with the fault of the planetary wheel.%为了研究行星轮系中主要故障裂纹的演化机理及其对系统的动态影响规律,首先研究了行星轮系中行星轮裂纹故障的数学描述方法;接着建立了行星轮发生裂纹故障时的齿轮时变啮合刚度计算模型,分析了行星轮裂纹故障对时变啮合刚度的影响;然后通过建立行星轮系平移-扭转耦合动力学模型,获得了行星轮轮齿裂纹故障下的系统振动响应;最后通过分析响应特征,揭示了行星轮系中振动响应及啮合频率边频特征随行星轮裂纹故障发生、发展的变化规律.