双轴压缩下含舱内爆炸凹陷损伤薄板的剩余极限承载能力试验分析  

Experimental analysis on residual ultimate bearing capacity of thin plate with internal explosion dent damage under biaxial compression

作　　者：敖雷 史治中 张磊[1] 丁子奇 裴志勇[1] 吴卫国[1] AO Lei;SHI Zhizhong;ZHANG Lei;DING Ziqi;PEI Zhiyong;WU Weiguo(Green&Smart River-Sea-Going Ship Cruise and Yacht Research Center,Wuhan University of Technology,Wuhan 430063,China;School of Naval Architecture,Ocean and Energy Power Engineering,Wuhan University of Technology,Wuhan 430063,China)

机构地区：[1]武汉理工大学绿色智能江海直达船舶与邮轮游艇研究中心,湖北武汉430063 [2]武汉理工大学船海与能源动力工程学院,湖北武汉430063

出　　处：《中国舰船研究》2025年第2期245-255,共11页Chinese Journal of Ship Research

摘　　要：[目的]为评估舰船毁伤生命力并支撑战场快速决策,进行复杂海况下损伤结构剩余承载能力分析。[方法]针对舱内爆炸损伤后的船体薄板,通过模型试验,分析双轴压缩下含凹陷损伤薄板的剩余承载能力。通过不同载荷比例加载,分析凹陷损伤薄板在组合载荷作用下的力学特性。基于数字图像相关法(DIC),建立三维全场应变测量系统,详细记录薄板的面外变形过程,揭示双轴压缩下含凹陷损伤薄板的破坏失效模式。[结果]结果显示,在任意加载比例下,凹陷损伤的存在都会显著降低薄板的剩余承载能力,最大可达19.96%,所有板均是因加载边夹角处的塑性大变形而破坏失效;随着双向轴压一端载荷的增加,另一端的极限承载能力会显著下降。[结论]所做研究对复杂应力下舰船毁伤生命力评估和安全返港具有重要指导意义。[Objectives]In modern naval warfare,advancements in weaponry have significantly increased the vulnerability of ships to explosion impacts.Precision-guided weapons,in particular,pose a significant threat,as internal explosions within ship cabins can cause extensive damage to thin-walled structures.This damage not only compromises the ship's structural integrity but also affects its overall functionality and safety.To accurately assess a ship's ability to withstand such damage and make informed battlefield decisions,it is crucial to evaluate the residual load-bearing capacity of damaged structures under complex sea conditions.This analysis is essential for evaluating the ship's damage tolerance and determining its ability to safely return to port.[Methods]This study focuses on the behavior of hull plates damaged by in-cabin explosions.A series of meticulously designed model tests were conducted,aiming to analyze the residual load-bearing capacity of thin plates exhibiting dent damage under biaxial compression.The use of biaxial compression is highly relevant,as it replicates the complex stress states experienced by ship hulls in actual sea conditions.To measure the detailed mechanical behavior of the damaged plates,the digital image correlation(DIC)method was employed.This advanced technique enabled the creation of a three-dimensional full-field strain measurement system,which recorded the out-of-plane deformation of the plates with high precision.By analyzing this data,the study explored the failure modes of dent-damaged thin plates under biaxial compression,illuminating the mechanisms through which such damage progresses and ultimately leads to structural failure.[Results]The experimental results provided significant insights into the behavior of damaged thin plates under biaxial compression.A key finding was that,regardless of the applied loading ratio,the presence of dent damage led to a substantial reduction in the residual load-bearing capacity of the thin plates.In some cases,this reduction reached up to 19.

关 键 词：爆炸 舱内爆炸 凹陷损伤 双向轴压 全场应变测量技术 剩余极限强度 模型试验 

分 类 号：U661.43[交通运输工程—船舶及航道工程]