Meshing of gear is a typical example where non-stationary conditions exit.Load, velocities, curvature of meshing point varies along the line of action at any time.

• 摘要齿轮的非稳态弹流润滑问题，由于啮合过程中滑滚比、曲率半径、卷吸速度和载荷变化范围较大，因此数值计算稳定性很差。