Experimental and numerical study on dynamic buckling of cylindrical shells with initial imperfections subjected to underwater explosion

IF 8.3 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2026-05-01 Epub Date: 2026-02-26 DOI:10.1016/j.tws.2026.114729

Chen-Xing Qu , Shao-Fei Ren , Xin-Yang Li , Qiang Zhong , Meng-Long Qiu

{"title":"Experimental and numerical study on dynamic buckling of cylindrical shells with initial imperfections subjected to underwater explosion","authors":"Chen-Xing Qu , Shao-Fei Ren , Xin-Yang Li , Qiang Zhong , Meng-Long Qiu","doi":"10.1016/j.tws.2026.114729","DOIUrl":null,"url":null,"abstract":"<div><div>Dynamic buckling of imperfect cylindrical shells subjected to underwater explosion (UNDEX) is investigated by experimental and numerical approaches. Initial geometric and thickness imperfections of cylindrical shells were measured by the 3D scanning equipment and ultrasonic thickness gauge, respectively, and the experiment was conducted in a large-scale explosion basin. Then, a numerical model for predicting the dynamic buckling behavior of imperfect shells subjected to UNDEX was developed by the reverse modeling technology, and numerical simulations were conducted by the coupled acoustic-structural method. Circumferential and axial buckling modes obtained by experiment and numerical simulation are in good agreement. The shock wave induced by UNDEX typically induces localized yielding in the shell, making it more prone to buckling under the combined bubble pulsation loading and hydrostatic pressure. The buckling failure process of the imperfect shell subjected to UNDEX can be categorized into three stages: the onset of dynamic buckling, the transition of the buckling mode from lower-order to higher-order, and the final collapse. Meanwhile, hydrostatic pressure significantly influences the critical load of dynamic buckling and buckling process of the shell. Moreover, the buckling mode is governed by the distribution pattern of geometric imperfections, while larger imperfection amplitudes result in more severe buckling failure.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"224 ","pages":"Article 114729"},"PeriodicalIF":8.3000,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Thin-Walled Structures","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0263823126002533","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2026/2/26 0:00:00","PubModel":"Epub","JCR":"Q1","JCRName":"ENGINEERING, CIVIL","Score":null,"Total":0}

引用次数: 0

Abstract

Dynamic buckling of imperfect cylindrical shells subjected to underwater explosion (UNDEX) is investigated by experimental and numerical approaches. Initial geometric and thickness imperfections of cylindrical shells were measured by the 3D scanning equipment and ultrasonic thickness gauge, respectively, and the experiment was conducted in a large-scale explosion basin. Then, a numerical model for predicting the dynamic buckling behavior of imperfect shells subjected to UNDEX was developed by the reverse modeling technology, and numerical simulations were conducted by the coupled acoustic-structural method. Circumferential and axial buckling modes obtained by experiment and numerical simulation are in good agreement. The shock wave induced by UNDEX typically induces localized yielding in the shell, making it more prone to buckling under the combined bubble pulsation loading and hydrostatic pressure. The buckling failure process of the imperfect shell subjected to UNDEX can be categorized into three stages: the onset of dynamic buckling, the transition of the buckling mode from lower-order to higher-order, and the final collapse. Meanwhile, hydrostatic pressure significantly influences the critical load of dynamic buckling and buckling process of the shell. Moreover, the buckling mode is governed by the distribution pattern of geometric imperfections, while larger imperfection amplitudes result in more severe buckling failure.

查看原文本刊更多论文

水下爆炸作用下初始缺陷圆柱壳动力屈曲的实验与数值研究

采用实验和数值方法研究了不完全圆柱壳在水下爆炸作用下的动态屈曲问题。利用三维扫描设备和超声测厚仪分别测量了圆柱壳的初始几何缺陷和厚度缺陷，并在大型爆炸池中进行了实验。在此基础上，利用反建模技术建立了不完全壳在UNDEX作用下动态屈曲行为的数值模型，并采用声-结构耦合方法进行了数值模拟。实验结果与数值模拟结果吻合较好。UNDEX诱导的激波通常会导致壳体局部屈服，使壳体在气泡脉动载荷和静水压力联合作用下更容易发生屈曲。不完善壳在UNDEX作用下的屈曲破坏过程可分为三个阶段：动力屈曲开始阶段、低阶屈曲模式向高阶屈曲模式转变阶段和最终破坏阶段。静水压力对壳体动屈曲和屈曲过程的临界载荷影响显著。屈曲模式受几何缺陷的分布规律支配，缺陷幅值越大，屈曲破坏越严重。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.