船舶推进轴系校中有限元法的改进及软件实现

详细论述了有限元的基本理论,根据实际情况,考虑船舶推进轴系校中计算中剪切变形的影响,对有限元法的刚度矩阵进行了改进.利用VB.NET开发了船舶推进轴系校中计算通用软件,通过与没有考虑剪切变形的国内外同类计算软件计算结果的比较以及实际中的应用,表明了这种改进是合理的且可以获得更准确的结果.所开发的计算软件,界面友好,功能完善,操作简单,满足轴系设计计算、校核计算的需要,进一步完善了船舶推进轴系校中计算模型,便于二次开发与深入研究.

Improvement of Finite Element Analysis in the Propulsion Shaft Alignment

The basic theory of the Finite Element Method is presented in detail . According to the practice of the propulsion shaft alignment,some improvements are made in the stiffness matrix due to taking the shear deformation effect into consideration.Based on the presented algorithm,the propulsion shaft alignment c alculation program is developed in VB.NET language.By comparing calculation resu lts with the output of other similar software without considering the shear defo rmation effect and the application in practice,it is proved that these improveme nts in the Finite Element Method are reasonable and can obtain more accurate res ults.The user-friendly interfaces,perfect functions and simple operations are in cluded in the software,which meets the need of the checkout of the marine propul sion shaft and consummates the propulsion shaft alignment calculation model.It i s convenient for the further redevelopment and study.