多种参数影响下的船舶艉轴承润滑性能分析

针对安装误差导致的轴颈倾斜角、主轴转速、艉轴工作环境温度等因素对船舶艉轴承润滑性能影响的问题，以某散货船为研究对象，基于Reynolds边界条件，运用有限差分法对Reynolds方程进行求解，通过数值分析软件MATLAB进行编程，获得不同工况下艉轴承的润滑模型。进而对多种参数影响下的油膜压力和油膜厚度差异进行对比分析。结果表明:考虑轴颈倾斜角的情况下，轴颈倾角逐步增大，油膜压力峰值与轴颈倾角呈现正相关关系，最小油膜厚度减小速度先快后慢；主机在不同工况下，油膜压力峰值与主轴转速呈现负相关关系，最小油膜厚度与主轴转速则呈现出一种近似正比的关系；当艉轴工作环境温度变化时，随着温度的升高，最大油膜压力逐渐增大，最小油膜厚度变化趋势则相反，逐渐向减小的方向发展。

Analysis of Lubrication Performance of Stern Bearing Under the Influence of Various Parameters

In view of the influence of the inclination angle of the journal, the rotation speed of the main shaft, the working temperature of the stern shaft and other factors caused by the installation error on the lubrication performance of the stern bearing of the ship, taking a bulk carrier as the research object, based on the Reynolds boundary conditions, the Reynolds equation is solved by the finite difference method, and the lubrication model of the stern bearing under different working conditions is obtained by the programming of the numerical analysis software MATLAB. Furthermore, the differences of oil film pressure and oil film thickness under the influence of various parameters are compared and analyzed. The results show that when the inclination angle of the journal is taken into account, the inclination angle of the journal increases gradually, and the peak value of oil film pressure has a positive correlation with the inclination angle of the journal, while the minimum oil film thickness decreases faster first and then slower; under different operating conditions, the peak value of oil film pressure has a negative correlation with the rotating speed of the main shaft, and the minimum oil film thickness has a nearly proportional relationship with the rotating speed of the main shaft When the ambient temperature changes, with the increase of temperature, the maximum oil film pressure increases gradually, while the minimum oil film thickness changes in the opposite direction, and gradually decreases.