In this study, the dynamic characteristics of the water-lubricated rubber bearing considering asperity contact are numerically studied, including water-film stiffness and damping coefficients and plastic-elastic contact stiffness coefficient.
The Kogut-Etsion elastic-plastic contact model is applied to calculate the contact stiffness coefficient at the bearing-bush interface and the perturbed method is used to calculate the stiffness and damping coefficients of water-film. In addition, the rubber deformation is determined by the finite element method (FEM) during the simulation. Parametric studies are conducted to assess the effects of the radial clearance, rubber thickness and elastic modulus on the dynamic characteristic of water-lubricated rubber bearing.
Numerical results indicate that stiffness and damping coefficients of water film and the contact stiffness of asperity are increased with the decreasing of the radial clearance and the dynamic coefficients are less sensitive to the rubber thickness compared with the elastic modulus of rubber. Furthermore, due to the existed groove, a sudden change of the water film direct stiffness and damping coefficients is observed when the eccentricity ratio ranges from 0.6 to 1.0.
It is expected this study can provide more information to establish a dynamic equation of water-lubricated rubber bearings exposed to mixed lubrication conditions.
The author(s) disclosed receipt of the following financial support for the research, authorship and/or publication of this article: Major theme project of technological innovation and application development of Chongqing (cstc2018jszx-cyztzxX0026), National Natural Science Foundation of China (51705053) and the Science and Technology Research Program of Chongqing Municipal Education Commission (KJQN201801536).
Xiang, G., Wang, Y., Wang, C. and Lv, Z. (2021), "Numerical study on the dynamic characteristics of water-lubricated rubber bearing under asperity contact", Industrial Lubrication and Tribology, Vol. 73 No. 4, pp. 572-580. https://doi.org/10.1108/ILT-12-2020-0453
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