温压弹爆炸冲击波作用下防护门的动力响应  

Dynamic Response of Blast Door Subjected to Explosion Wave of Thermobaric Bomb

作　　者：苗朝阳[1,2] 李秀地[1,2] 孙伟 杨森[1,2] 王起帆[2] 

机构地区：[1]岩土力学与地质环境保护重庆市重点实验室(后勤工程学院),重庆401311 [2]后勤工程学院土木工程系,重庆401311 [3]沈阳军区房地产管理局,沈阳110000

出　　处：《四川兵工学报》2015年第10期51-54,共4页Journal of Sichuan Ordnance

基　　金：国家部委基金(CY213J009)

摘　　要：温压弹爆炸冲击波具有持续时间长、冲量高的特点。为揭示温压弹爆炸冲击波作用下防护门的破坏机理,利用大型有限元软件ANSYS/LS-DYNA建立了分离式钢筋混凝土防护门动力响应的数值计算模型,并用试验实测数据验证了计算模型的可靠性。在此基础上,针对温压弹冲击波的特点,分析了防护门的挠度、剪应力及其破坏模式,并与TNT冲击波的作用结果进行了对比。数值计算结果表明:温压弹冲击波作用下防护门的挠度、转角及变形均大于TNT冲击波作用的结果;防护门的动力响应不仅与温压弹冲击波的冲量大小有关,还与温压弹冲击波的衰减速率有关;温压弹冲击波作用下防护门的破坏模式主要为弯剪耦合破坏,而TNT冲击波作用下防护门的破坏模式主要为剪切破坏。The explosion wave of thermobaric bomb has the characteristics of long duration and high im- pulse. To reveal the destruction mechanism of blast door subjected to explosion wave of thermobaric bomb, separate reinforced concrete numerical model of the dynamic response of blast door was established with the dynamic finite element software ANSYS/LS-DYNA, and the dependability of the numerical model was ver- ified by the experimental data. On this base, results of the deflection and shear stress and the failure mode of the blast door were analyzed and compared with the shock wave of TNT according to the characteristics of the thermobaric bomb. The results show that the deflection, rotation angle and deformation of blast door subjected to thermpbaric bomb are bigger than that to TNT, and the dynamic response of blast door is not only related to the impulse of thermobaric bomb but also to the decay rate of shock wave, and the failure mode under thermobaric bomb is mainly shear bending coupling failure, while the failure mode of blast door under TNT is mainly shear failure.

关 键 词：爆炸力学 温压弹 防护门 动力响应 数值模拟 

分 类 号：O383.1[理学—流体力学]