多胞金属细观模型的抗爆炸临界长度分析

Analysis of cellular metal’s critical length of anti-blast with meso-structural model

为解决多胞金属抗爆炸设计中的长度选用问题,本文基于R-PH模型的多胞金属抗爆炸临界长度设计方法,应用三维Voronoi模型,对多胞金属的抗爆炸临界长度进行了仿真分析。结果显示,当多胞金属杆长度相对胞元孔径大很多时,理论预测的临界长度合理;当多胞金属杆长度相对胞元孔径未足够长时,边界处的非完整胞元对结果影响较大,预测的临界长度无法完全吸收规定的爆炸载荷产生的能量。

This paper focuses on the length selection of metal cellular in the anti-blast design.A design method of anti-blast critical length based on R-PH model is applied,and simulations using three-dimension Voronoi model are performed.Results show that the theoretically predicted value of critical length is reliable when cellular metal bar is much longer than the diameter of a cell.When the predicted value of critical length is not long enough,the result would be affected by the incomplete cells at the boundary,which lead to insufficiency of the predicted critical length.