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Calculation Method of Dynamic Stress of Flexible Ring Gear and Dynamic Characteristics Analysis of Thin-Walled Ring Gear of Planetary Gear Train
Journal of Vibration Engineering & Technologies ( IF 2.7 ) Pub Date : 2020-10-29 , DOI: 10.1007/s42417-020-00259-6
Chenglong Wang , Xiangfeng Zhang , Jianxing Zhou , Hongwei Wang , Yong Shen , Shuai Qiao

Purpose

This work presents an analysis method for the vibration and stress characteristics of the ring gear.

Methods

First, the dynamic model of planetary gear sets is established to extract the meshing force of meshing element. The model is then combined with the load tooth contact analysis (LTCA) method to determine the load relationship between teeth. The dynamic characteristics of the ring gear are calculated using the modal superposition method and Newmark β time integration method, and the effectiveness of the calculation method is verified by comparing with the experimental results. Finally, the vibration and stress characteristics of the thin-walled ring gear are analyzed.

Results and Conclusion

The amplitude and stress of ring gear vibration increase obviously at resonance speed. Because of the flexibility of the thin-walled ring gear, the compressive stress of the tooth root at the meshing position is obviously smaller than the tensile stress caused by the concave deformation. Due to the influence of external convex deformation, the stress on the outside of the gear ring at the meshing position is more concentrated than the tooth root position.



中文翻译:

行星齿轮系柔性齿圈动应力的计算方法及薄壁齿圈动特性分析

目的

这项工作提出了一种分析齿圈振动和应力特性的方法。

方法

首先,建立行星齿轮组的动力学模型,以提取啮合元件的啮合力。然后将模型与负载齿接触分析(LTCA)方法结合起来,以确定齿之间的负载关系。利用模态叠加法和Newmarkβ时间积分法计算了齿圈的动态特性,并与实验结果进行了比较,验证了该方法的有效性。最后,分析了薄壁齿圈的振动和应力特性。

结果与结论

环形齿轮振动的振幅和应力在共振速度下明显增加。由于薄壁齿圈的柔韧性,在啮合位置的齿根压应力明显小于由凹形变形引起的拉应力。由于外部凸形变形的影响,在啮合位置处比在齿根位置处更集中在齿轮环外侧上的应力。

更新日期:2020-10-30
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