舱室内爆载荷燃烧增强效应试验及仿真研究  

Experimental and simulation study of afterburning effect for blast load in confined cabin

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

机构地区：[1]武汉理工大学船海与能源动力工程学院,湖北武汉430063 [2]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

出　　处：《中国舰船研究》2023年第4期223-232,共10页Chinese Journal of Ship Research

基　　金：国家自然科学基金资助项目(52171318)。

摘　　要：[目的]TNT炸药在密闭空间中发生爆炸时,其爆轰产物的燃烧效应不可忽视,为准确分析TNT炸药在密闭空间中的爆炸载荷,需要探究爆轰产物燃烧释放的能量与药量体积比的关系。[方法]首先开展5种不同质量的TNT分别在空气和氦气环境密闭空间中的爆炸试验,然后基于化学反应分析、能量守恒、等熵假设3种不同的方法计算5种不同药量体积比对应的爆轰产物燃烧能量,并基于有限元分析软件ANSYS/AUTODYN开展考虑燃烧效应的密闭空间内爆炸数值计算。[结果]准静态压力仿真结果与试验结果的对比表明:3种方法中,通过化学反应计算得到的燃烧能量理论值可作为上限值,能量守恒法的准确性依赖爆炸后混合气体的绝热指数,等熵假设法仿真值与试验值误差稳定在4%~7%之间;不同的燃烧能量释放历程会影响反射冲击波压力,但不改变最终的准静态压力。[结论]研究结果可为舰船抗爆结构设计及毁伤评估提供更精确的输入载荷。[Objectives]The afterburning effect need to be considered when TNT explodes inside a con-fined space.In order to accurately analyze the internal blast load,it is necessary to explore the relationship between the afterburning energy value and the charge volume ratio.[Methods]The explosion experiments of 5 different masses of TNT were performed in the confined spaces filled with air and helium.Based on three different methods of chemical reaction analysis,energy conservation law and hypothetical isentropic process,the corresponding afterburning energy of five different charge volume ratios is calculated.The numerical sim-ulation of explosion in confined space considering afterburning effect was realized by ANSYS/AUTODYN program.[Results]The comparison between quasi-static pressure simulation results and experimental res-ults shows that the theoretical value of afterburning energy calculated by chemical reaction analysis method can only be used as the upper limit value,the accuracy of energy conservation method depends on the adiabat-ic index of mixed gas,and the error of assumed isentropic process method is stable between 4%~7%.Differ-ent afterburning energy release processes do not change the final quasi-static pressure,but only the reflected shock wave pressure.[Conclusions]The research results can provide more accurate input load for the design and damage assessment of anti-explosion structures.

关 键 词：内爆载荷 燃烧效应 能量释放 准静态压力 

分 类 号：U661.4[交通运输工程—船舶及航道工程] O383.3[交通运输工程—船舶与海洋工程]