有限元分析在船舶轴系设计中的应用

使用Abaqus软件建立船舶轴系中间轴的模型，通过有限元方法计算轴法兰过渡处的应力集中系数，分析应力集中系数与轴系扭振计算结果之间的关系。相比于单圆弧过渡，三段式圆弧过渡将应力集中系数减小了20%，持续运转扭振许用应力提高了38%，瞬时运转扭振许用应力提高了17%。运用有限元分析方法检验校核了船舶轴系设计的合理性。

Application of finite element analysis in marine shaft design

The intermediate shaft was modeled by ABAQUS and the stress concentration factor was calculated with method of finite element analysis. And it analyzed the relationship between the stress concentration factor and the torsional vibration calculation. Compared to single radii transition, Multi radii transition reduced the stress concentration factor by 20 percent. meanwhile, the torsional vibration allowable stress value in continuous operation mode was increased by 38 percent and that in instantaneous operation mode was increased by 17 percent. The finite element analysis checked the rationality of the marine shaft design.