Interval analysis for normal contact stiffness of mechanical joint surface based on the Legendre-scanning method
LIU Yong1,QU Jie1,ZHANG Qing1,WANG Dawei1,YAN Fangchao2
1.College of Aeronautical Engineering, Civil Aviation University of China, Tianjin 300300, China;
2.Tianjin Bool Technology Co., Ltd., Tianjin 200392, China
Abstract:An interval model was established to analyze the normal contact stiffness of a mechanical joint. The model takes into consideration the uncertain parameters such as asperity radius of curvature, distribution density, and asperity height variance. To address the limitations of traditional contact stiffness models in determining the reasonable range of normal contact stiffness, the KE elastic-plastic contact stiffness model and Legendre polynomials were utilized. The model was validated by comparing it with contact stiffness test data and traditional model solution results. The feasibility and accuracy of Legendre-scanning method were proved by the results. The results show that the rough surface topography parameters have a significant impact on normal contact stiffness, with the uncertainty of asperity height variance having the greatest influence. As the dimensionless contact distance decreases, the degree of influence increases. The establishment and analysis of the interval model for normal contact stiffness in mechanical joints can serve as a reference for further research on joints.
刘勇1,渠杰1,张青1,王大伟1,闫方超2. 基于勒让德-扫描法的机械结合部法向接触刚度区间分析[J]. 振动与冲击, 2024, 43(8): 70-77.
LIU Yong1,QU Jie1,ZHANG Qing1,WANG Dawei1,YAN Fangchao2. Interval analysis for normal contact stiffness of mechanical joint surface based on the Legendre-scanning method. JOURNAL OF VIBRATION AND SHOCK, 2024, 43(8): 70-77.
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