【摘要】 【目的】针对齿面点蚀这一斜齿轮接触疲劳的主要失效形式，深入研究点蚀程度对齿轮系统振动特性的影响规律。【方法】首先，构建了斜齿轮副多自由度非线性动力学模型；其次，基于实际点蚀的几何形状和位置，采用改进的势能法结合有限元法，系统分析了不同点蚀程度下的时变啮合刚度；最后，将该关键参数代入动力学模型，模拟从轻微到严重点蚀状态下的时频域振动响应，并与故障演化阶段的试验数据进行了对比验证。【结果】结果表明，仿真所得的基频谐波、故障特征频率及边频带分布等关键指标与试验结果呈现较好的一致性。研究成果为斜齿轮副的故障诊断与健康预测提供了重要的依据与技术支撑。更多还原

【Abstract】 [Objective] Pitting corrosion on tooth surfaces is a primary failure mode in helical gear contact fatigue, significantly affecting the operational stability of gear systems. This study aims to investigate the influence of pitting severity on vibration characteristics. [Methods] Firstly, a multi-degree-of-freedom nonlinear dynamic model of a helical gear pair was established. Secondly, based on the actual pitting morphology and location, the time-varying mesh stiffness under varying degrees of pitting was analyzed using an improved potential energy method combined with the finite element method. Finally, this crucial parameter was incorporated into the dynamic model to simulate vibration responses in both time and frequency domains, ranging from mild to severe pitting conditions. [Results] The simulation results show a great agreement with the test data in terms of fundamental frequency harmonics, fault characteristic frequencies, and sideband distributions. These findings provide a foundation and technical basis for the fault diagnosis and health prognosis of helical gear pairs.更多还原