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水下爆炸载荷作用下变截面结构中应力波的传播特性研究
Research on propagation characteristics of stress wave in the variable cross-section structure subjected to underwater explosion load
孟子飞, 徐思博, 刘文韬, 陈海龙
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作者单位:哈尔滨工程大学 船舶工程学院, 黑龙江 哈尔滨 150001
中文关键字:变截面结构;水下爆炸载荷;CEL方法;应力波;冲击响应谱
英文关键字:variable cross-section structure; underwater explosion load; CEL method; stress wave; shock response spectrum
中文摘要:随着科学技术的发展,越来越多的学者关注水下爆炸对舰船结构的毁伤特性研究。应力波作为结构载荷和能量传递的形式,对于认识结构系统的冲击响应特性至关重要。但是,关于水下爆炸载荷作用下船体板架类变截面结构中应力波的传播特性目前仍认识不足。本文将基于应力波理论,借助有限元法研究在冲击载荷作用下变截面杆和舷侧外板中弹性波的传播特性。首先,结合应力波理论,基于耦合的欧拉-拉格朗日法(CEL)和欧拉体积分数法研究在水下爆炸冲击载荷作用下变截面杆中弹性波的传播特性,对数值研究方法的精度进行验证;然后研究舷侧外板在受到水下爆炸冲击载荷作用下结构中弹性波的传播特性,并且利用冲击响应谱分析方法研究结构的响应规律,为后续研究复杂舰船结构的冲击响应规律提供参考。
英文摘要:With the development of science and technology, more and more scholars pay attention to the damage characteristics of ship structures subjected to underwater explosion. As the form of structural load and energy transfer, stress wave is very important to understand the shock response characteristics of structural system. However, the propagation characteristics of stress wave in the variable section structure of the ship hull under the underwater explosion load are still unknown. Based on the stress wave theory and the finite element method, the propagation characteristics of elastic wave in a cross-section bar and side plating under impact load are investigated in this paper. Firstly, this paper discusses the propagation characteristics of elastic wave in a variable cross-section bar under underwater explosion load and verify the accuracy of numerical method according to the stress wave theory, Coupled Eulerian-Lagrangian method (CEL) and Eulerian volume fraction method; Then this paper discusses the propagation characteristics of elastic wave in side plating subjected to underwater explosion shock load and studies the response pattern of plates. Finally, this paper can provide a reference for the research of shock response in complex ship structures.
2019,41(7): 12-19 收稿日期:2018-07-20
DOI:10.3404/j.issn.1672-7649.2019.07.003
分类号:U661.4
基金项目:国家自然科学基金资助项目(51679044)
作者简介:孟子飞(1994-),男,硕士研究生,研究方向为舰船结构毁伤与生命力评估
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