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A shape-independent analytical method for gear mesh stiffness with asymmetric spalling defects
Yi Jin1, Qingyuan Zhang2,3, Yunxia Chen4,5
1School of Intelligent Manufacture, Taizhou University, Jiaojiang, 318000, China.
Scientific Reports
|July 5, 2024
Summary
This study introduces a new torsional stiffness model to accurately quantify asymmetric spalling defects in gears. This improves gear dynamics analysis and failure prediction by overcoming limitations of current time-varying mesh stiffness (TVMS) models.
Area of Science:
- Mechanical Engineering
- Vibrations and Dynamics
Background:
- Spalling is a common gear failure mechanism impacting gear operation dynamics.
- Existing time-varying mesh stiffness (TVMS) models often inaccurately represent asymmetric spalling, hindering failure prediction.
Purpose of the Study:
- To develop a novel method for quantifying asymmetric spalling defects in gears.
- To create a shape-independent TVMS model for accurate gear dynamics analysis.
Main Methods:
- Introduced torsional stiffness to quantify asymmetric spalling effects.
- Proposed an equivalent stiffness calculation for various asymmetric shapes.
- Developed a shape-independent TVMS model for fast calculations.
- Implemented a Finite Element Method (FEM) based validation with improved result extraction.
Main Results:
- The proposed model accurately quantifies asymmetric spalling effects.
- A shape-independent TVMS model was successfully constructed.
- FEM validation confirmed the model's effectiveness across diverse loading conditions.
- Analysis revealed the impact of different asymmetric spalling types on gear dynamics.
Conclusions:
- The new torsional stiffness approach enhances the accuracy of TVMS modeling for spalling defects.
- The developed shape-independent model offers a more reliable tool for identifying and predicting gear spalling failures.
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