半球壳夹层结构在水下冲击荷载作用下的动态响应

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2024-10-13 DOI:10.1016/j.tws.2024.112550

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引用次数: 0

摘要

本研究设计了带有半球壳核心层的铝夹层结构，并对其进行了水下冲击加载实验和数值模拟，以研究其动态响应和能量吸收机制。在设计和制造出半球壳夹层板之后，使用包含流体与结构相互作用的实验设备对其进行加载。利用高速摄影的三维数字图像相关（3D-DIC）方法捕捉了夹层板的动态响应，并通过数值模拟分析了能量吸收机制。本研究主要考虑了安装方向、冲击波冲力和胶膜对夹芯板的影响。结果表明，夹芯板的变形模式和抗冲击性随安装方向的不同而变化。干面板中点的位移与冲击波冲力成线性关系。当非线性冲击力超过 0.0085 时，前向安装目标板的抗冲击性更高。此外，粘合膜对半球壳芯层的变形模式有显著影响。去除粘合剂薄膜后，芯层吸收能量的比例会略有增加。对半球壳夹层板的结构-响应-能量关系进行了定量和定性分析，从而为研究未来金属夹层结构的水下抗冲击性能提供了指导。

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Dynamic response of hemispherical-shell sandwich structures subjected to underwater impulsive loading

In this study, experiments and numerical simulations are designed on aluminum sandwich structures with a hemispherical-shell core layer under underwater impact loading to investigate the dynamic response and energy absorption mechanisms. After the hemispherical-shell sandwich panels are designed and fabricated, they are loaded using an experimental apparatus incorporating fluid–structure interactions. The dynamic response of the sandwich panels is captured using the three-dimensional digital image correlation (3D-DIC) method of high-speed photography, and the energy-absorption mechanisms are analyzed via numerical simulation. This study primarily considers the effects of installation orientation, shock wave impulse and adhesive film on the sandwich panels. The results indicate that the deformation mode and impact resistance of the sandwich panels vary depending on the installation orientation. The displacement at the midpoint of the dry facesheet is linearly related to the shock wave impulse. At non-dimensional impulses exceeding 0.0085, the impact resistance of the forward installation target plate is higher. Additionally, the adhesive film significantly affects the deformation mode of the hemispherical-shell core layer. Its removal slightly increases the proportion of energy absorbed at the core. Quantitative and qualitative analyses of the structure-response-energy relationship are performed on the hemispherical-shell sandwich panels, thus providing guidance for investigations pertaining to the underwater impact resistance of future metal sandwich structures.

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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.