考虑轴倾斜的滑动轴承流固耦合瞬态分析

考虑轴受力产生变形引起的轴倾斜，采用流固耦合方法，直接求解Navier?Stokes方程，对滑动轴承系统中轴和润滑油膜进行三维瞬态分析，同时求解流场和固体域，得到油膜动态压力分布、轴心的运动轨迹和不同转速下油膜厚度分布. 结果表明，轴倾斜使油膜压力分布和轴心轨迹变化明显，最小油膜厚度减小，流场压力峰值增大. 通过对滑动轴承的三维瞬态分析可以预测轴承工作过程中实时的轴心轨迹、压力分布、油膜厚度等润滑特性，为滑动轴承的优化设计提供参考.

Transient analysis of misaligned journal bearings based on fluid-structure interaction approach

The shaft is deformed with the action of load. The misalignment due to deformation caused by the action of load is considered. The fluid-structure interaction method was used. Navier-Stokes equation was solved directly. The three-dimensional transient analysis of shaft and oil film in journal bearing system was carried out. The flow field and solid domain were solved at the same time. Transient film pressure distribution, trajectory of journal center and minimum oil film thickness under different rotate speeds were solved. The results show that the oil film pressure distribution and thickness of oil film change obviously. The minimum oil film thickness decreases, the peak oil film pressure increased when misalignment was considered. The real-time trajectory of journal center, oil film thickness and transient film pressure distribution can be predicted by the transient analysis, which is very significant for the optimal design of journal bearing.