Damage characteristics of fixed single-layer squaresteel plate under near-field underwater explosion of small equivalent column charge

被引：0
|
作者：
Qin Y. [1 ]
Wang Y. [1 ]
Wang Z. [1 ]
Yao X. [1 ]
机构：
[1] College of Shipbuilding Engineering, Harbin Engineering University, Harbin
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2021年 / 40卷 / 07期
关键词：
Cylinder charge; Damage effect; Near-field underwater explosion; Runge-Kutta discontinuous Galerkin (RKDG) method;
D O I：
10.13465/j.cnki.jvs.2021.07.004
中图分类号：
学科分类号：
摘要：
In order to study damage characteristics of fixed single-layer square steel plate under near-field underwater explosion of small equivalent column charge, the high-precision Runge-Kutta discontinuous Galerkin(RKDG)method was used to solve the column charge near-field underwater explosion load, and the solution was compared with that obtained using the empirical formula of underwater explosion, both of them agreed well each other.The calculated explosion load was input into the LS-DYNA nonlinear finite element solver, damage characteristics of the fixed single-layer square steel plate were obtained, they were compared with test results to verify the accuracy of the model. It was shown that the Runge-Kutta discontinuous Galerkin-finite element method(RKDG-FEM) coupled computation model can accurately simulate damage response characteristics of fixed singer-layer square steel plate under column charge near-field underwater explosion.Then, damage modes of the fixed single-layer square steel plate with thickness of 4 mm andcharge of 5-30 g as well thickness of 3-8 mm and ascharge of 20 g werestudied, respectively. The results showed that damage modes of fixed single-layer square steel plate are mainly plastic deformation, petal type break and plug type round break; the break size calculation formula considering charge weight and plate thickness is fitted; the study results can provide a reference for the damage research of single-layer plate under small equivalent column charge near-field underwater explosion. © 2021, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：29 / 36
页数：7
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