基于谱分析法的大型集装箱船疲劳强度评估

Fatigue strength evaluation of large container ship based on spectral method

本文采用谱分析法对船舶进行疲劳强度评估,论述了谱分析法的基本原理。以1艘大型集装箱船为例,利用MSC.Patran软件进行全船有限元建模,采用三维线性势流软件Compass-Walcs进行波浪载荷计算,通过PCL语言完成波浪载荷及舱室惯性力的自动加载,结合S-N曲线和Miner线性累积损伤理论对大型集装箱船的典型部位进行疲劳强度评估。

This paper adopts the spectral method to do the fatigue strength evaluation and the principles of spectral method is discussed. As a large container ship for example, the FEM model of global ship is built by MSC.Patran, the wave load is calculated by three-dimension linear potential flow software Compass-Walcs, the wave load and cargo inertia force is automatically applied by using PCL language. The fatigue strength evaluation for typical structures of large container ship is performed based on S-N curve and the principles of Miner linear accumulation damage.