基于ANSYS Fluent的仿生表面微织构仿真分析

Simulation Analysis of Bionic Surface Micro-Texture Based on ANSYS Fluent

随着对表面微织构研究的不断深入,表面微织构已经被研究证实具有较为优越的摩擦性能。为了研究仿生表面微织构对于材料表面摩擦学性能的影响,本文基于仿生思想,以自然界生物表面为原型抽象设计出三角形、梯形、正方形表面织构,利用Fluent软件分别对不同形貌表面微织构进行流体润滑仿真分析,分析对比了不同形貌的微织构对于油膜内部压力分布的影响。结果表明:与光滑表面相比,表面微织构的存在能够使表面油膜产生流体动压润滑效应,能够有效改善摩擦副之间的摩擦学性能。其中梯形织构具有较大的平均正压力值,和较小的负压,摩擦学性能最好。三角形织构的静压力峰值比正方形和梯形织构峰值都要大,峰值之间间距最小。为表面微织构设计的应用提供一定的理论指导和技术支撑。

With the deepening of the research on the surface micro-texture,the surface micro-texture has been proved to have superior friction properties.In order to study the influence of biomimetic surface micro-texture on the tribological properties of material surfaces,this paper abstractically designs triangular,trapezoidal and square surface textures based on the biomimetic idea and takes the natural biological surface as the prototype,and uses Fluent software to conduct fluid lubrication simulation analysis on the surface micro-texture of different morphologies.The influence of different morphologies on the pressure distribution in the oil film was analyzed and compared.The results show that compared with the smooth surface,the existence of micro-texture can produce hydrodynamic lubrication effect on the surface oil film,which can effectively improve the tribological properties between the friction pairs.Among them,trapezoidal texture has a larger average positive pressure value and a smaller negative pressure,so the tribological performance is the best.The peak static pressure of triangular texture is larger than that of square and trapezoidal texture,and the distance between the peaks is the smallest.It provides some theoretical guidance and technical support for the application of surface micro-texture design.