南海超大型抓斗疏浚船波浪载荷下结构强度评估研究

摘要

This study demonstrates how to impose wave load on the ship from the view of long-term forecast and to perform whole ship's FEM calculation for a 200m3 grab dredger.Influence of wave spreading functions was discussed.In contrast to the wave load working in the North Atlantic Ocean,the wave load in the South China Sea was calculated so as to put forward some suggestions on ships working in this maritime space.Both global and local structural stresses are calculated with FEM,as well as structural optimization was achieved.This thesis will provide reference for the development of dredger working in the South China Sea.%以一艘200方抓斗式疏浚船为例,阐述船舶波浪载荷长期预报和全船有限元直接计算方法.讨论不同波浪散布函数对船舶波浪载荷计算结果的影响.针对不同海域进行波浪载荷长期预报,通过对比分析得到南海海域波浪载荷水平,提出了南海工作船舶波浪载荷预报建议.在此基础上,对全船进行结构有限元分析,得到不同海域中全船结构应力水平,并对船体局部结构进行了优化,为在南海进行施工作业的疏浚船的设计提供参考.