基于有限单元法的可倾瓦轴承轴心轨迹仿真

Axis Orbit Simulation of Tilt-Pad Bearing Based on the Finite Element Method

摘要: 旨在运用有限单元法求解二维油膜压力，并将其与欧拉方法结合，综合考虑轴颈的惯性力与非惯性力，通过Matlab编程仿真，求得轴颈轴心轨迹。先利用有限单元法求解非定常Reynolds方程，并用雷诺边界条件定解，得到轴瓦二维油膜压力分布，同时在考虑轴颈不平衡力的基础上，建立滑动轴承的轴心轨迹运动方程，并利用欧拉法确定轴颈下阶段状态参数，仿真模拟五瓦可倾瓦轴承的轴心轨迹。通过对轴心轨迹、轴心位移、瓦块最大油膜力的变化验证了该方法的有效性。

Abstract: The finite element will be applied to solve the Reynolds equation and obtain the 2-D oil film pres-sure. The journal center trajectory motion equation of sliding bearing which is based on imbalance force is established; Euler’s method is applied in calculating the state of journal at next step; then Matlab program is applied to simulate the five pads tilt-pad bearing. The method will be proved by the shaft center orbit, the shaft center displacement and the oil film force.