考虑进油压力的滑动轴承非线性油膜力数据库

通过对ReyTlolds方程的非线性变换，提出了考虑进油压力边界条件时径向滑动轴承非线性油膜力数据库的建库方法，扩展了油膜力数据库计算方法的应用，通过引入2个有限数据域的新变量对转子轴心速度项和进油压力边界条件进行有限化处理，得到了更符合实际工况的连续性油膜力数据库及计算模型，同有限元法对比分析了非线性油膜力数据库的适用性．结果表明，非线性油膜力数据库模型的精度较高，所建立的非线性油膜力计算模型可用于对转子系统瞬态运动进行简便和快捷的分析．

Nonlinear Oil-Film Force Database of Journal Bearing Including Inlet Pressure

The method to establish the continuous nonlinear oil-film force database of hydrodynamic journal bearing including the inlet pressure boundary condition was developed making use of nonlinear transformations of Reynolds equations, which contributed to extending the application fields of the database method to compute nonlinear oil-film forces of finite-length journal bearings. The continuous nonlinear oil-film force database and the calculation models with better conformity to practical working conditions were established by introducing two new parameters with finite ranges to realize the finite treatment of the rotor axes velocity and the inlet pressure boundary condition. Finite element method (FEM) and the established database method were comparatively employed to calculate the oil-film forces of an elliptical bearing at any movement states of the axes. It was found that the results based on the database method were almost identical to that based on the FEM solutions. Thus the established nonlinear oil-film force database was applicable to analyzing the transient movement of a rotor system with convenience and good precision.