Fractal model of equivalent viscous damping for tangential contact in joint interfaces

被引：1

作者：

Wen S. ^{[1
]}

Zhang X. ^{[1
]}

Chen Y. ^{[1
]}

Lan G. ^{[1
]}

Li Q. ^{[1
]}

Wang K. ^{[1
]}

机构：

[1] School of Mechanical Engineering, Taiyuan University of Science and Technology, Taiyuan

来源：

| 1600年 / Xi'an Jiaotong University卷 / 51期

关键词：

Energy dissipation factor; Fractal model; Joint interface; Mechanical structure; Tangential contact damping;

D O I：

10.7652/xjtuxb201701001

中图分类号：

学科分类号：

摘要：

Based on the MB contact fractal theory and the mechanism of energy dissipation of tangential contact damping in joint interfaces as well as the definition of damping energy dissipation factor, the fractal model of equivalent viscous damping for tangential contact in joint interfaces and its energy dissipation factor model are proposed. It is shown from the models that there exist complex nonlinear relationships between the equivalent viscous damping of tangential contact in joint interfaces and such factors as the normal contact load, the friction coefficient, the plastic index of contact materials, the ratio of the tangential dynamic load amplitude to normal contact load (named tangential-normal load ratio for short), the fractal dimension, and the fractal roughness of joint interfaces. However, the energy dissipation factor of tangential contact damping is independent of the fractal dimension and fractal roughness, but only depends on the tangential-normal load ratio. Numerical simulations of the models show that the energy dissipation factor increases with the tangential-normal load ratio, but decreases with the friction coefficient of joint interfaces. The tangential contact equivalent viscous damping of joint interfaces increases with the normal contact load, the friction coefficient, and the plastic index of contact materials, but decreases with the fractal roughness. The variation rule of equivalent viscous damping with the fractal dimension is very complex: firstly it increases with the fractal dimension, and approaches a max value when the fractal dimension is equal to 1.65 or so, then decreases with the fractal dimension. © 2017, Editorial Office of Journal of Xi'an Jiaotong University. All right reserved.

引用

页码：1 / 8and50

页数：849

共 17 条

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