近距离爆炸下加筋板架的毁伤模式研究  

Study on damage modes of stiffened plate frame under near-distance explosion

作　　者：王琰 蒋海燕[1] 韩璐 苏健军[1] WANG Yan;JIANG Haiyan;HAN Lu;SU Jianjun(Xi’an Modern Chemistry Research Institute,Xi’an 710065,China)

机构地区：[1]西安近代化学研究所,西安710065

出　　处：《兵器装备工程学报》2025年第3期145-154,共10页Journal of Ordnance Equipment Engineering

摘　　要：为了研究近距离爆炸下舰船典型舱壁结构的毁伤模式,基于经实验验证的LS-DYNA有限元模型对近距爆炸时加筋板架结构的毁伤过程进行了数值模拟,并分析了装药质量和爆炸距离对结构毁伤的影响。研究结果表明:近距爆炸时板架结构呈现出4种毁伤模式:(Ⅰ)塑性大变形,(Ⅱ)板格局部撕裂,(Ⅲ)边界处拉伸撕裂破坏,以及(Ⅳ)剪切破坏,根据面板的损伤程度,毁伤模式Ⅲ又可划分为2种子失效模式;板架的损伤程度随着装药质量的增加和爆炸距离的减小而加重,比例距离一定时,随着爆炸距离的减小,板架逐渐从整体破坏向局部破坏转变;最后利用一维无量纲数Φ和二维无量纲数(Φ,β)分别对破坏模式的分布情况进行了分析,得到了一维和二维的破坏模式分布图以及经验预测公式,可为近距爆炸时舱壁的毁伤模式快速预测提供参考。In order to study the damage mode of typical bulkhead structure under close-range explosion,numerical simulation of damage process of stiffened plate structure during near-distance explosion was carried out based on LS-DYNA finite element model verified by experiment.The results show that there are four kinds of damage modes:(Ⅰ)large plastic deformation,(Ⅱ)plate pattern tearing,(Ⅲ)tensile tear failure,and(Ⅳ)shear failure.According to the damage degree of the panel,the damage modeⅢcan be divided into two sub failure modes.The damage degree of the plate frame increases with the increase of charge mass and the decrease of explosive distance.When the proportion distance is certain,the plate frame gradually changes from the whole failure to the local failure with the decrease of the explosion distance.At last,the distribution of failure modes is analyzed by using single dimensionless numberΦand two-dimensional dimensionless number(Φ,β)respectively,and the one-dimensional and two-dimensional failure pattern distribution diagrams and empirical prediction formulas are obtained,which can provide a reference for rapid prediction of the damage mode of the bulkhead during near-distance explosion.

关 键 词：近距爆炸 板架结构 毁伤模式 无量纲数 

分 类 号：O383.1[理学—流体力学]