非接触爆炸冲击波作用下船体结构响应的研究.pdf

摘要

非接触爆炸冲击波作用下船体结构响应研究

摘要

舰船在海战时,会遭到敌方反舰武器的攻击。从产生的破坏效果来
看,舰船受到的攻击可分为接触爆炸和非接触爆炸两类。非接触爆炸可
分为空中非接触爆炸和水下非接触两类。非接触爆炸主要是对舰船的船
体结构及仪器设备等造成破坏。本文针对水面舰船在空中和水下非接触
爆炸下的响应问题,采用理论分析和数值计算相结合的方法开展研究,主
要研究内容与结论如下:
。应用非
线性动力学软件 ,对空中和水下爆炸冲击波传播的全过程进
行数值模拟,计算结果与经验公式吻合,验证了软件和仿真方法的可行
性和准确性。讨论了不同的网格密度及炸药状态方程对空中爆炸冲击波
计算结果的影响。
。总结了空
爆作用船体结构响应的特点。给出了舰船爆炸问题的数值模拟时应注意
的一些问题,可供参考。
软件,对单面浸水的空背板在水下爆炸下的响
应进行了研究,讨论了应变率效应、空背板空气压力变化及试验装置的
整体运动对板变形的影响,得出相应结论。炸药在船底附近爆炸时,研
究了装载情况对双层底结构局部响应的影响,分别从结构变形及应力情
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摘要
况、能量吸收和冲击环境等方面进行比较,得出相关结论和建议。
本文所给出的结论和建议,对舰船的抗爆研究及设计具有很好的参
考价值。

关键词:非接触爆炸,,动态响应,空背板,双层底,装载
II
ABSTRACT
Study on Response of Ship Structure Under
Non-contact Explosion Shock Wave



ABSTRACT


A warship involved in a battle would encounter the assault from enemy
anti-warship weapons. In the light of its destructiveness,such assaults can be
divided into contact explosion and non-contact explosion,and the the latter
can be divided into that in the air and that under water. Non-contact explosion
mainly causes destruction to a warship’s structure,apparatus and equipments.
The present paper,with its focus on warship dynamical response problems
under non-contact explosion that in the air and that under water,researches on
the some issues by virtue of theoretical analysis and putation.
The main researches and conclusions in the paper are as follows:
1. Research on non-contact explosion shock wave problem both in air
and water. The non-linear transient dynamical software can
solve the explosion shock wave problem properly. putation
and experiential results are accordant. Availability and accuracy of the
software are proved. Effect of different element density and equation state of
I
ABSTRACT
detonator on explosion shock wave in the air is discussed.
2. Numerical simulation on dynamic response of whole ship