近场水下爆炸作用下箱形梁整体损伤特性研究

doi:10.3969/j.issn.1000-1093.2012.05.018

兵工学报 ›› 2012, Vol. 33 ›› Issue (5): 611-616.doi: 10.3969/j.issn.1000-1093.2012.05.018

近场水下爆炸作用下箱形梁整体损伤特性研究

李海涛¹，张永坤²，张振海¹

（1.海军工程大学科研部，湖北武汉 430033； 2.海军91439部队，辽宁大连 116041）

收稿日期:2010-05-18 修回日期:2010-05-18 上线日期:2014-03-04
作者简介:李海涛(1979—)，男，讲师，博士
基金资助:
国家自然科学基金项目（51109216）；国家“973”重大基础研究项目(51335020101)

Damage Characteristics of Box-like Beam as a Bulk Subjected to UnderwaterExplosion in Near-field

LI Hai-tao¹， ZHANG Yong-kun², ZHANG Zhen-hai¹

(1.Office of Research and Development, Naval University of Engineering, Wuhan 430033, Hubei, China;2.91439 PLA Navy Troops, Dalian 116041, Liaoning, China)

Received:2010-05-18 Revised:2010-05-18 Online:2014-03-04

摘要/Abstract

摘要： 当水下近距爆炸载荷对舰船产生耦合激励作用时，舰船的总体损伤特点是一个值得深入研究的问题。以水面箱形梁模型为研究对象，建立了梁模型在水下近距爆炸载荷作用下动态响应的有限元仿真方法，最后利用数值仿真和具体试验相结合的方法，对自由梁在水下特定爆炸工况下的整体损伤特性进行了研究。结果发现：数值计算结果和试验结果具有较好的一致性；在爆炸气泡脉动频率与梁模型一阶湿频率相近的条件下，随着爆径比的增大，梁的整体响应状态由整体中垂塑性弯曲转变为鞭状运动。

关键词: 爆炸力学, 近场水下爆炸, 气泡脉动, 响应模式, 鞭状运动, 数值仿真, 试验研究

Abstract: When warship acts against underwater near-field explosion and coupling resonant motion takes place, the damage characteristics of the warship deserves an advanced research. A box-like beam was designed as an object floating on water, and a numerical simulation method was presented to study on the dynamic response of the beam subjected to underwater explosion located closely. Finally，experiments were carried out to verify the simulation method. The results show that numerical results agree well with experimental ones, and it proves the method reasonable. When the first-order mode frequency of beam is close to that of underwater explosion bubble oscillation, with the increase of the ratio of stand-off to maximum bubble radius, the response mode of beam will take a change from plastic bending in sagging condition into elastic whipping motion.

Key words: mechanics of explosion, underwater near-field explosion, bubble oscillation, response mode, whipping motion, numerical simulation, experimental study

中图分类号:

U661.7
O383

李海涛，张永坤，张振海. 近场水下爆炸作用下箱形梁整体损伤特性研究[J]. 兵工学报, 2012, 33(5): 611-616.

LI Hai-tao， ZHANG Yong-kun, ZHANG Zhen-hai. Damage Characteristics of Box-like Beam as a Bulk Subjected to UnderwaterExplosion in Near-field[J]. Acta Armamentarii, 2012, 33(5): 611-616.

参考文献

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近场水下爆炸作用下箱形梁整体损伤特性研究

Damage Characteristics of Box-like Beam as a Bulk Subjected to UnderwaterExplosion in Near-field

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