表面织构对人工膝关节流体动力润滑性能的影响

Analysis of Effect of Surface Texture on Friction and Lubrication Performance of Artificial Knee Joint

为探究表面织构对人工膝关节流体润滑性能的影响,对加入表面织构的人工膝关节进行流体动力润滑分析,推导出适合该模型的雷诺方程,并基于有限差分法对雷诺方程进行求解,通过借助MATLAB软件进行编程计算,得到表面织构参数对本模型的摩擦润滑性能的影响规律。结果表明:随着表面织构深度的增大,摩擦因数先增大后减小,在研究的表面织构半径范围内,摩擦因数随着表面织构半径的增大而减小,因此在一定范围内,适当增加表面织构半径和表面织构深度有利于改善该模型的摩擦润滑性能。

In order to investigate the influence of surface texture on the lubrication performance of knee joint, the lubrication behavior of the artificial knee joint with surface texture was investigated.The Reynolds equation of the model of artificial knee joint with surface texture was established and solved based on finite difference method.With the aid of MATLAB software ,the impact of surface texture parameters on the friction and lubrication properties of the model was analyzed.The results show that with the increase of the surface texture depth, the friction coefficient is increased first and then decreased. In the range of the surface texture radius studied, the friction coefficient is decreased with the increase of the surface texture radius.Therefore, in the proper range, the increase of the surface texture radius and depth can improve the friction and lubrication performance of the model of artificial knee joint with surface texture.