基于疲劳强度的双层底船体典型节点优化设计  

Optimal design of typical joints of double bottom hull based on fatigue strength

作　　者：乔浪豪 严仁军[1,2] 邱屿 刘瑞[1] QIAO Lang-hao;YAN Ren-jun;QIU Yu;LIU Rui(School of Naval Architecture,Ocean and Energy Power Engineering,Wuhan University of Technology,Wuhan 430063,China;Key Laboratory of High Performance Ship Technology of Ministry of Education,Wuhan University of Technology,Wuhan 430063,China)

机构地区：[1]武汉理工大学船海与能源动力工程学院,湖北武汉430063 [2]武汉理工大学高性能舰船技术教育部重点实验室,湖北武汉430063

出　　处：《舰船科学技术》2024年第10期59-64,共6页Ship Science and Technology

基　　金：工信部高技术船舶科研资助项目(MC-202002-C01-02)。

摘　　要：结构疲劳破坏是造成船舶与海洋结构物的主要破坏模式之一,对于双层底船体某些结构形式,其疲劳强度问题尤为突出。选取某大型散货船为研究对象,依据整船有限计算结果以及大量文献调查,确定疲劳损伤部位,对船体双层底过渡区典型节点及优化后节点分别设计和开展缩比模型试验,综合试验与有限元计算结果验证了疲劳试验以及优化方式的可靠性,并采用D曲线与CCS《船体结构疲劳强度指南》对节点模型进行疲劳强度评估,结合疲劳试验结果进一步说明,该优化方案对双层底船体类似节点的结构设计具有一定借鉴意义。Structural fatigue failure is one of the main failure modes of ships and marine structures,and the fatigue strength problem is particularly prominent for some structural forms of double-bottom hull.Therefore,a large bulk carrier is selected as the research object.According to the finite calculation results of the whole ship and a large number of literature surveys,the fatigue damage location is determined.The scale model test is designed and carried out for the typical joints and optimized joints in the transition zone of the double-bottom hull.The comprehensive test and finite element calculation res-ults verify the reliability of fatigue test and optimization method,and the fatigue strength of the joint model is evaluated by using D curve and CCS"Guidelines for fatigue strength of ship structure".Combined with the fatigue test results,it further shows that the optimization scheme has certain reference significance for the structural design of similar joints in the double-bottom hull.

关 键 词：双层底船体 典型节点 疲劳强度 疲劳试验 

分 类 号：U661.4[交通运输工程—船舶及航道工程]