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箱形梁在水下近距非接触爆炸作用下的整体毁伤研究
引用本文:李海涛,朱锡,赵小龙,黄晓明.箱形梁在水下近距非接触爆炸作用下的整体毁伤研究[J].振动与冲击,2010,29(3):158-161.
作者姓名:李海涛  朱锡  赵小龙  黄晓明
作者单位:1. 海军工程大学,船舶与动力学院,武汉,430033
2. 海军装备研究院,舰船论证研究所,北京,100161
基金项目:国家"973"计划研究项目 
摘    要:为了研究舰船在水下近场爆炸作用下的整体毁伤模式,根据相似原则设计了两种箱形梁模型,将TNT炸药置于模型中部正下方爆炸,通过改变爆距和药量来研究试验模型在不同爆炸工况下的整体运动特性,并利用高速摄影仪观察模型的动态响应过程.试验研究发现:在梁模型一阶湿频率与气泡脉动频率相近的条件下,气泡脉动会激起结构明显的整体弯曲运动;当爆距与最大气泡半径之比为1~1.5时,梁结构会发生中垂破坏,形成一个或两个塑性绞;当爆距与最大气泡半径之比为2~4时,梁结构会发生鞭状运动响应;水下爆炸气泡对水面结构的整体毁伤作用大于初始冲击波。

关 键 词:水下非接触爆炸  气泡脉动  高速摄影  毁伤模式  试验研究
收稿时间:2008-12-5
修稿时间:2009-8-31

Study on integral damage modes of box-like beam subjected to underwater closely located non-contact explosion
LI Hai-tao,ZHU Xi,ZHAO Xiao-long,HUANG Xiao-ming.Study on integral damage modes of box-like beam subjected to underwater closely located non-contact explosion[J].Journal of Vibration and Shock,2010,29(3):158-161.
Authors:LI Hai-tao  ZHU Xi  ZHAO Xiao-long  HUANG Xiao-ming
Affiliation:LI Hai-tao1,ZHU Xi1,ZHAO Xiao-long2,HUANG Xiao-ming1(1.College of Naval Architecture , Power,Naval University of Engineering,Wuhan 430033,China,2.Institute of Naval Vessels,Naval Academy of Armament,Beijing 100161,China)
Abstract:In order to study the damage modes of warships subjected to underwater blast loading,two experimentally used box-like beams were designed based on similarity criterion.Dynamic responses of the beams floating on water subjected to underwater explosion were investigated by changing the distance from explosion source and the amount of explosive with TNT charge located closely under the mid-span of the models.In tests,high-speed photography was applied to obtain the whole process how the objects react against b...
Keywords:underwater non-contact explosion  bubble pulse  high-speed photography  damage mode  experimental study
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