基于结构响应的舱室内爆TNT等效方法  

TNT equivalency method in confined cabin based on structural response

作　　者：周沪[1,2] 孔祥韶[1] 罗峰[1,2] 曹宇航 郑成[1] 吴卫国[1] ZHOU Hu;KONG Xiangshao;LUO Feng;CAO Yuhang;ZHENG Cheng;WU Weiguo(Green&Smart River-Sea-Going Ship,Cruise and Yacht Research Center,Wuhan University of Technology,Wuhan 430063,China;School of Naval Architecture,Ocean and Energy Power Engineering,Wuhan University of Technology,Wuhan 430063,China)

机构地区：[1]武汉理工大学绿色智能江海直达船舶与邮轮游艇研究中心,湖北武汉430063 [2]武汉理工大学船海与能源动力工程学院,湖北武汉430063

出　　处：《中国舰船研究》2024年第3期86-95,共10页Chinese Journal of Ship Research

基　　金：国家自然科学基金资助项目(52171318,12202329);装备预研教育部联合基金资助项目(8091B022105)。

摘　　要：[目的]旨在揭示爆轰产物后燃烧效应对封闭空间中爆炸载荷的影响规律。[方法]通过往封闭舱室中充入氮气来抑制爆轰产物燃烧,开展在空气和氮气两种不同气体环境下封闭舱室内TNT爆炸响应试验,记录温度、压力变化历程和靶板中心点残余挠度,建立基于无量纲载荷参数的靶板变形与炸药释放能量之间的关系,并提出考虑后燃烧效应的封闭空间TNT等效方法。[结果]结果发现,由于爆轰产物燃烧能量释放量不同,在氮气环境中,封闭空间内爆炸压力、温度和靶板动态响应明显低于空气环境。内爆载荷分析需计入TNT爆炸产物燃烧释放的能量及其增强效应。[结论]与现有基于准静态压力的TNT当量计算方法进行的比较表明,所提基于结构响应的舱室内爆TNT等效方法具有合理性和良好的适用性。[Objective]This paper aims to reveal the influence of the afterburning effect of explosive materi-als in confined space explosion.[Methods]A series of TNT blast tests are performed in a confined cabin filled with two different atmospheres,air and nitrogen.The temperature,pressure-time histories and deflection of the blast-loaded steel plate are recorded.The relationship between the deformation of the target plate and the energy released by the explosive is established.On this basis,a TNT equivalent method is proposed which takes into account the afterburning effect in a confined cabin.[Results]The pressure,temperature and dy-namic response of the target plate are significantly lower in the nitrogen environment than in the air environ-ment due to the difference in the amount of energy released by the combustion of the explosive material.Thus,the energy released by the burning of TNT explosive materials and their enhancement effects should be con-sidered in blast load analysis.[Conclusion]The validity and applicability of the method are illustrated through a comparison with the existing TNT equivalent method based on quasi-static pressure.

关 键 词：封闭爆炸载荷 后燃烧效应 TNT当量 

分 类 号：U674.7[交通运输工程—船舶及航道工程]