钢板-砂土-钢板组合防爆墙对爆炸冲击波的防护效应分析

为避免或减轻爆炸冲击波对建筑物的破坏作用，对钢板-砂土-钢板组合防爆墙对爆炸冲击波的防护效应进行了三维数值模拟研究。为分析防爆墙对爆炸冲击波的防护作用，提出了超压防护效应系数概念，分析了药量、爆距、结构高度等参数对组合结构防护效应的影响；给出了各比例爆距、比例墙高条件下防护效应系数的计算公式，得到了组合防爆墙背波面空气冲击波超压的预测模型。研究表明，比例爆距减小、墙高增大时，防爆墙对冲击波的防护效应增强。

Analysis of protective effectiveness of steel-sandstone-steel composite blast wall against blast waves

For the comparative analysis of blast walls on the protective effects of blast waves, a steel-sand-steel com- posite structure was given and the protective effectiveness of the composite structure against blast waves was studied using 3 D numerical simulation method. The concept of overpressure protection effect coefficient is proposed and cal- culation methods are given. The protective effects of composite structures are analyzed under various parameters such as charge weight, explosive distance and structure height. The formula of overpressure protection effect coefficient of various scaled explosive distance and scaled wall height is proposed. The overpressure forecasting mode on the back of the blast walls is obtained. The analyses indicate that the protective effectiveness of composite blast walls against blast waves increases when the wall＇s height increases or scaled blast distance decreases.