Efficient Contact Position Detection and Wear Prediction for Spherical Joint in Spatial Multibody System

被引：0
|
作者：
Su Y. [1 ,3 ]
Chen W. [2 ]
Ruan D. [3 ]
机构：
[1] Shaanxi Key Laboratory of Advanced Manufacturing and Evaluation of Robot Key Components, Baoji University of Arts and Sciences, Baoji, 721016, Shaanxi
[2] Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System, Xi'an Jiaotong University, Xi'an
[3] Department of Mechanical and Product Design Engineering, Faculty of Science, Engineering and Technology, Swinburne University of Technology, Melbourne
来源：
Hsi-An Chiao Tung Ta Hsueh/Journal of Xi'an Jiaotong University | 2020年 / 54卷 / 03期
关键词：
Contact detection; Lookup table; Spherical joint with clearance; Wear prediction;
D O I：
10.7652/xjtuxb202003006
中图分类号：
学科分类号：
摘要：
A new contact analysis approach based on lookup table is proposed to deal with the problem of low calculation efficiency involved in wear prediction for clearance ball joint in multi-body system considering the interaction between wear and mechanical dynamics. The proposed method utilizes lookup table to store the geometric position, kinematical parameters and wear depth of discrete points on the surface of the ball joint after the contact surface is discretized as regular and representative points. By checking the table, required information can be extracted to determine contact location instead of calculating the spatial distance of contact points. Accurate contact stress distribution for conformal contact with micro clearance is gained using modified Hertz model with less computational cost than finite element method. Thus, multi-body dynamics and contact wear can be integrated into the unified model efficiently. A spatial linkage mechanism with ball joints containing clearance is taken as example to verify the proposed method. Numerical results show that the wear occurs dominantly in the latitude interval of -30°~80° the wear region and the wear region expands greatly along longitude direction after 105 revolutions of crank, the computation time is only 83 min, and higher calculation efficiency is obtained compared with finite element analysis. © 2020, Editorial Office of Journal of Xi'an Jiaotong University. All right reserved.
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页码：41 / 48
页数：7
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