A staggered grid shell particle method for shell structural damage subjected to underwater explosion

IF 6.9 1区工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY

Computer Methods in Applied Mechanics and Engineering Pub Date : 2025-04-16 DOI:10.1016/j.cma.2025.117996

Jiasheng Li , Yong Liang , Zhixin Zeng , Xiong Zhang

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引用次数: 0

Abstract

A novel staggered grid shell particle method (SGSPM) is proposed in this paper to model the shell structural damage subjected to underwater explosion. The material point method (MPM) is used to model the fluid in underwater explosion, and the solid shell material point method (SSMPM) is adopted to model the shell structures. A staggered grid scheme is employed to eliminate the cell crossing noise and improve the accuracy of fluid simulation, and a conversion algorithm is proposed to handle the dynamic fracture of shell structures. In addition, a local multi-mesh contact method is introduced into the staggered grid scheme for modeling the fluid–structure interaction. Several numerical examples, including full hemispherical shell, penetration of a thin plate, large deformation of a plate subjected to underwater explosion, fragmentation of a plate and structural damage of a ship hull subjected to contact underwater explosion, are studied by the proposed SGSPM, and the numerical results agree well with the data in the literature and experiments.

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水下爆炸作用下壳结构损伤的交错网格壳粒法

本文提出了一种新的交错网格壳粒法（SGSPM）来模拟水下爆炸作用下的壳结构损伤。采用物质点法（MPM）对水下爆炸中的流体进行建模，采用固体壳材料点法（SSMPM）对壳结构进行建模。为了消除单元交叉噪声，提高流体模拟的精度，采用了交错网格格式，并提出了一种处理壳结构动态断裂的转换算法。此外，在交错网格方案中引入了局部多网格接触法来模拟流固耦合。利用所提出的SGSPM对半球形全壳、薄板侵彻、水下爆炸作用下板的大变形、水下爆炸作用下板的碎裂和接触水下爆炸作用下船体的结构损伤等数值算例进行了研究，结果与文献和实验数据吻合较好。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Computer Methods in Applied Mechanics and Engineering 工程技术-工程：综合

CiteScore

12.70

自引率

15.30%

发文量

719

审稿时长

44 days

期刊介绍： Computer Methods in Applied Mechanics and Engineering stands as a cornerstone in the realm of computational science and engineering. With a history spanning over five decades, the journal has been a key platform for disseminating papers on advanced mathematical modeling and numerical solutions. Interdisciplinary in nature, these contributions encompass mechanics, mathematics, computer science, and various scientific disciplines. The journal welcomes a broad range of computational methods addressing the simulation, analysis, and design of complex physical problems, making it a vital resource for researchers in the field.