PBX炸药细观孔洞缺陷对其冲击点火特性的影响  

Effect of Meso-defect Holes on the Shock-to-ignition Characteristics of PBX Explosives

作　　者：王洪波[1] 王旗华[1] 卢永刚[1] 梁斌[1] 冯晓伟[1] 

机构地区：[1]中国工程物理研究院总体工程研究所,四川绵阳621900

出　　处：《火炸药学报》2015年第5期31-36,共6页Chinese Journal of Explosives & Propellants

基　　金：国家自然科学基金(11002134);中国工程物理研究院"双百人才工程"基金资助(ZX04135)

摘　　要：基于Monte-Carlo法的思想,采用有限元计算方法建立了考虑炸药颗粒尺寸、形状和位置随机分布的高聚物黏结炸药(PBX)的细观结构模型。通过计算比较了孔洞缺陷及缺陷大小对PBX炸药冲击点火特性的影响。结果表明,孔洞缺陷降低了炸药的临界点火压力,提高了其冲击感度;随着孔洞缺陷尺寸的增大,炸药的临界点火压力逐渐下降,但当缺陷尺寸超过一定范围时,更大尺寸的孔洞缺陷并没有继续提高炸药的冲击感度。Based on Monte-Carlo method,the meso-structural models of plastic bonded explosives(PBX)considering the grain size,shape and location in random distribution were established by a non-linear finite element method.The effects of holes defect and its size on the shock-to-ignition characteristics of PBX were analyzed and compared by calculation.Results show that the holes defect reduces the critical ignition pressure of explosive,and increases its shock sensitivity.With the increase of the size of holes defect,the critical ignition pressure of explosive gradually decreases,but when the size of holes defect over a certain range,larger holes defect will not continue to improve the shock sensitivity of explosive.

关 键 词：高聚物黏结炸药 PBX 细观结构模型 冲击点火 孔洞缺陷 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] O381[理学—流体力学]