针对实验模拟直齿圆柱齿轮不同失效类型及不同失效程度高成本和难度大的问题。本文应用集中参数法建立直齿圆柱齿轮的弯-扭耦合振动分析模型，运用能量法计算时变啮合刚度，研究了裂纹、点蚀等不同失效形式对齿轮副时变啮合刚度的影响规律，随后通过系统模型修正方法，修正动力学模型中的系统参数，以建立与实际系统较吻合的动力学模型。通过修正后的直齿圆柱齿轮数值算例，揭示了不同失效类型及失效程度的时域、频域特征响应规律。对实验振动信号分析，验证了含故障的直齿圆柱齿轮动力学模型的准确性。结果表明，该模型可以准确识别直齿圆柱齿轮多种齿轮失效类型，为直齿圆柱齿轮系统的故障诊断数据库建立提供了数据支撑。
Abstract
It is difficult and costly to simulate complete gear failure types and failure degrees by experiment. In this paper, a bent-torsional coupling vibration analysis model of spur gear is established by using a lumped parameter method, and the time-varying meshing stiffness is determined by using the energy method. With the proposed model, the influence of different failure forms such as crack, pitting on the time-varying meshing stiffness of gear pair is studied. Following this, the system parameters in the dynamic model are adjusted using the system model modification method to create a dynamic model that more closely aligns with the actual system. The numerical example of the corrected spur gear reveals the characteristic response rules in the time and frequency domains for different failure types and degrees. The accuracy of the dynamic model for spur gears with faults is confirmed through the analysis of experimental vibration signals. The results show that the model can accurately identify various gear failure types in spur gears, providing strong data support for establishing a fault diagnosis database for spur gear systems
关键词
齿轮动力学模型 /
模型修正 /
故障机理 /
故障数据库
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Key words
Gear dynamics model /
Structural dynamic modification /
Failure mechanism /
Fault database
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