复合材料船体结构疲劳剩余刚度试验研究  

Experimental Study on Fatigue Residual Stiffness of Composite Ship Hull Structure

作　　者：王伟 李开研 徐志亭[1] 冯国庆 刘涛[2] WANG Wei;LI Kaiyan;XU Zhiting;FENG Guoqing;LIU Tao(Marine Design and Research Institute of China,Shanghai 200011,China;College of Shipbuilding Engineering,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]中国船舶及海洋工程设计研究院,上海200011 [2]哈尔滨工程大学船舶与海洋工程结构力学研究所,哈尔滨150001

出　　处：《中国造船》2024年第5期136-146,共11页Shipbuilding of China

基　　金：国家自然科学基金项目(52171301)。

摘　　要：以复合材料船体结构为研究对象,开展了船用复合材料标准件压缩试验。根据试件的强度特性,设计了相应的疲劳加载水平,并进行标准件的压—压疲劳试验,构建材料的疲劳剩余刚度模型。随后,选取船体上典型节点进行了3种不同应力水平的疲劳试验,利用标准件的刚度退化曲线,对结构件在不同应力水平和循环次数下的剩余刚度进行预估。结果显示:在3种应力水平下,通过标准件预测的刚度与实际试验测得的刚度之间的差异较小,误差在10%左右。The research focuses on composite ship hull structures.Initially,compressive tests were conducted on standardized composite components for ships.The fatigue loading levels were determined based on the strength design of the specimens,followed by fatigue tests under compression-compression loading conditions for the composite standard components.A fatigue residual stiffness model for the material was established through these tests.Typical joints of the hull were selected for fatigue tests at three stress levels.The stiffness degradation curves of the standard components were employed to estimate the residual stiffness of structural components under different stress levels and cycle counts.The predicted stiffness of the standard components under three stress levels closely matched the actual experimental stiffness,with an error of approximately 10%.

关 键 词：复合材料 典型节点 剩余刚度 船体结构 疲劳评估 

分 类 号：U668.1[交通运输工程—船舶及航道工程] O346.2[交通运输工程—船舶与海洋工程]