水润滑轴承系统三维热弹流性能有限元分析

Three-dimensional finite element analysis for thermo-elasto-hydrodynamic performances for a water lubricated bearing system

使用自编流固耦合轴承有限元程序,利用影响系数法和非线性优化法,对水润滑轴承系统的轴承―水介质―轴系统的热弹流性能进行了三维有限元分析。同时,有限元程序的有效性也被证实。仿真结果表明:一定工况下的水润滑轴承存在明显的弹性变形和一定程度的热变形;小膜厚比下轴承会出现明显的温升。因此,水润滑轴承的设计中,其变形和温升应加以考虑。

Three-dimensional liquid-solid coupling finite element analysis for thermo-elasto-hydrodynamic performances for a water-lubricated bearing system is conducted using finite element code, based on the influence coefficient method, and nonlinear optimization method. Meanwhile, the code is validated. Numerical results show that significant elastic deformation and thermal deformation, contact pressure with certain amplitude, and large temperature rise over the range of the small film thickness-roughness ratio can occur for the bearing. Therefore, the above deformation and temperature rise should be considered in designs and applications of water-lubricated bearings.