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鉴于钢管良好的变形能力、吸能特性和夹层结构在强度、刚度上的优势,提出了分层结构为钢板-钢管芯层-钢板的三明治型抗爆组合板。对芯层钢管数量为5根、4根、3根的组合板进行了TNT装药量为1kg的接触爆炸试验,考察了各板在承受接触爆炸冲击荷载时的变形及破坏情况,并对变形破坏过程进行了理论分析和数值模拟。研究表明,钢板夹钢管组合板承受接触爆炸冲击荷载时,主要发生局部压缩变形。钢管变形是组合板耗散能量的主要途径。增加钢管数量,增大钢板厚度,增大钢管管壁厚度,均可减小组合板在接触爆炸条件下的变形破坏,提高抗接触爆炸性能。
In view of the good deformability of steel pipe, energy absorption characteristics and advantages of sandwich structure in strength and stiffness, a sandwiched antiknock composite plate with layered structure as steel plate, steel core and steel plate is proposed. The contact explosion test of 1kg TNT was carried out on the composite steel plates with 5, 4 and 3 core steel tubes. The deformation and failure of the plates under impact load were investigated. Destruction process is analyzed theoretically and numerical simulation. The results show that the main compressive deformation occurs when the steel plate composite plate subjected to impact load. Steel tube deformation is the main way to dissipate energy. Increasing the number of steel pipes, increasing the thickness of the steel plate and increasing the thickness of the steel pipe wall can reduce the deformation and failure of the composite plate under the conditions of contact explosion and improve the resistance to contact explosion.