Shape optimization of hydrodynamic textured surfaces for enhancing load-carrying capacity based on level set method
Zhirong Tu, Meng Xiangkai, Ma Yi, Peng Xudong
Abstract
In order to maximize the load-carrying capacity (LCC) of the textured surfaces , the level set method is introduced to conduct the shape optimization of surface textures under the cavitating hydrodynamic lubrication condition. The optimized surface texture shapes are evolved by the Hamilton-Jacobi equation based on the shape derivative obtained by the shape sensitivity analysis . In the optimization procedure , the velocity regularization method and the re-initial equations are applied to make sure a smooth evolution process. The optimization method is validated by two slider bearing optimization problems. Then the optimal surface texture shapes of a textured surface and a parallel thrust bearing are analyzed. The results show that the optimization method is stable and the optimal geometries are the chevron-type shapes. • The level set method is used to optimize the surface texture shapes of a textured surface and a parallel thrust bearing . • The obtained optimum texture and groove shapes show chevron patterns. • Optimum texture and groove shapes can greatly enhance the load-carrying capacity in cavitating hydrodynamic lubrication .