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Computational study of pitting defect influence on mesh stiffness for straight beveloid gear
Engineering Failure Analysis ( IF 4 ) Pub Date : 2020-09-29 , DOI: 10.1016/j.engfailanal.2020.104971
Ruihua Sun , Chaosheng Song , Caichao Zhu , Xingyu Yang , Xinzi Li

As the representation for the effects of contact and bending elasticity gear tooth, variational mesh stiffness is an important source of excitation for gear vibration. Aiming to get the numerical method of calculating mesh stiffness of the irregular taperred tooth profile, an efficient slice-based mesh stiffness modeling method is introduced for straight beveloid gear pair with and without the pitting corrosion defect. The deformation for tooth fillet and transient curve part are considered to improve the calculation accuracy. The FEM model is used to verify the results obtained by the proposed model and showed that the peak error is only 3.2%. Then the effects of different sizes and locations of pitting defects are analyzed. Results show that the size of pitting defect is a significant influencing factor for mesh stiffness. The mesh stiffness is reduced by 28.3% as the radius of pitting defect increases from 1 mm to 5 mm. For the impacts of pitting defect locations, the mesh stiffness has a noticeable fluctuation when the pitting defect is close to tooth root. While the pitting defect is shfited from root to a certain height, the mean mesh stiffness is decreased by 2.2% and the fluctuating value is decreased by 24.6%.The distance between pitting corrosion center and transverse plane has a little influence on the mesh stiffness.



中文翻译:

点蚀缺陷对直齿锥齿轮齿轮啮合刚度影响的计算研究

作为接触和弯曲弹性齿轮齿影响的表示,变化的啮合刚度是引起齿轮振动的重要动力。为了获得计算不规则锥齿轮廓啮合刚度的数值方法,引入了一种有效的基于切片的直齿锥齿轮副的啮合刚度建模方法。考虑了圆角和过渡曲线部分的变形,以提高计算精度。有限元模型用于验证所提出的模型获得的结果,并表明峰值误差仅为3.2%。然后分析了不同尺寸和位置的点蚀缺陷的影响。结果表明,点蚀缺陷的大小是影响网格刚度的重要因素。随着点蚀缺陷的半径从1 mm增加到5 mm,网格刚度降低了28.3%。对于点蚀缺陷位置的影响,当点蚀缺陷靠近齿根时,网格刚度会有明显的波动。当点蚀缺陷从根部修整到一定高度时,平均网格刚度降低2.2%,波动值降低24.6%。点蚀腐蚀中心与横断面之间的距离对网格刚度影响不大。

更新日期:2020-10-07
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