径向轴承挤压计算，给定偏心距和变化的载荷，计算在一个时间段内各个时刻的偏心距、膜厚、轴心移动速度和挤压速度-Radial bearing extrusion calculated given eccentricity and variation of the load calculated in a period of time each time the eccentric distance, thickness, axial moving speed and the extrusion sp

分析简支梁在移动载荷作用下其受力最大位置处，并利用应力值判断其失效可能(analyze the most dangerous place of the simply supported beam under the moving load)