TVMS Calculation and Dynamic Analysis of Cracked Gear considering Oil Film Stiffness

IF 1.2 4区工程技术 Q3 ACOUSTICS Shock and Vibration Pub Date : 2024-03-27 DOI:10.1155/2024/5571578

Jiateng Wu, Zhenqi Du, Chengbiao Tong

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Abstract

A time-varying meshing stiffness (TVMS) model that includes oil film stiffness in the elastohydrodynamic lubrication (EHL) line contact is proposed for tooth root cracking. This model employs the oil film thickness to estimate the stiffness of the oil film in gear contact by considering the profile variation of the oil film induced by tooth root cracks, to provide the evolution principle of TVMS in EHL line contact to study the effects of oil film stiffness of cracked gear on the TVMS. The results of the analysis reveal that the overall result of TVMS decreases owing to the stiffness of the oil film, whereas the combined TVMS depends mainly on the rotation speed of the gear system because the thickness of the oil film in the tooth crack is affected by the velocity of the entrainment. Furthermore, a six-degree-of-freedom (DOF) dynamic model is introduced to analyze the vibration behavior of the gear system using the combined TVMS results for different crack levels, and the influence of the combined TVMS on the vibration response of the tooth root crack is exhibited from the time-domain analysis, frequency-domain analysis, and statistical indicator analysis.

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考虑油膜刚度的裂纹齿轮 TVMS 计算和动态分析

针对齿根裂纹，提出了一种包含弹流润滑（EHL）线接触中油膜刚度的时变啮合刚度（TVMS）模型。该模型通过考虑齿根裂纹引起的油膜轮廓变化，利用油膜厚度来估算齿轮接触中的油膜刚度，提供了 EHL 线接触中 TVMS 的演化原理，以研究裂纹齿轮的油膜刚度对 TVMS 的影响。分析结果表明，TVMS 的总体结果会因油膜刚度而降低，而综合 TVMS 主要取决于齿轮系统的转速，因为齿缝中的油膜厚度会受到夹带速度的影响。此外，还引入了一个六自由度 (DOF) 动力模型，利用不同裂纹程度下的组合 TVMS 结果分析齿轮系统的振动行为，并从时域分析、频域分析和统计指标分析中展示了组合 TVMS 对齿根裂纹振动响应的影响。

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来源期刊

Shock and Vibration 物理-工程：机械

CiteScore

3.40

自引率

6.20%

发文量

384

审稿时长

3 months

期刊介绍： Shock and Vibration publishes papers on all aspects of shock and vibration, especially in relation to civil, mechanical and aerospace engineering applications, as well as transport, materials and geoscience. Papers may be theoretical or experimental, and either fundamental or highly applied.