基于SPH法的径向滑动轴承动压润滑研究

为了研究润滑油膜的粒子性对流体动压润滑的影响，该文提出利用SPH方法（光滑粒子动力学方法）分析径向滑动轴承流体动压润滑，模拟结果通过计算流体动力学（CFD）软件FLUENT分析结果和润滑理论提供的解析解进行了比较验证。同CFD 法一样，SPH法的压力分布结果揭示了润滑理论忽略掉的流体惯性效应。三种方法速度场分析结果略有不同。因此，SPH模型由于反映了流体的粒子性，可成为求解滑动轴承中的复杂流体润滑问题的有效工具。

Study on hydrodynamic lubrication of radial sliding bearing based on SPH

In order to study the influence of lubrication film particle to fluid dynamic pressure lubrication, hydrodynamic lubrication of radial sliding bearing was modeled utilizing the SPH (Smoothed Particle Hydro-dynamics) method. The results were verified by comparison to Computational Fluid Dynamics (CFD) soft-ware FLUENT and analytical solution of lubrication theory. As well as CFD, the SPH pressure distribution results discovered the fluid inertial effects that lubrication theory failed to capture. By comparison, velocity profile differed slightly among all three methods. Therefor smoothed particle methods could show the parti-cle features of fluids, it should be useful tools for complex hydrodynamic lubrication problems in sliding bearings.