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 results 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.
2024,46(10): 59-64 收稿日期：2023-07-10
DOI：10.3404/j.issn.1672-7649.2024.10.010
分类号：U661.4
基金项目：工信部高技术船舶科研资助项目（MC-202002-C01-02）
作者简介：乔浪豪(1998-),男,硕士研究生,研究方向为结构安全性与可靠性
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