高压物理学报2024，Vol.38Issue(3)：158-170,13.DOI:10.11858/gywlxb.20230834
错位多次打击下UHPC靶体损伤破坏效应的数值模拟研究
Numerical Investigation on Damage and Failure of UHPC Targets Subjected to Dislocation Multi-Attacks
摘要
Abstract
Based on the LS-DYNA three-dimensional numerical modeling method and the modified Kong-Fang concrete material model,the numerical investigation on damage and failure of ultra-high performance concrete(UHPC)targets subjected to dislocation multi-attacks was carried considering the two-dimensional normal distribution of strike points.The numerical model and material models along with the corresponding parameters were firstly validated by comparing the numerical simulation results of the UHPC targets subjected to projectile penetration followed by explosion to the corresponding test data.Then numerical simulation of the damage and failure in UHPC targets under the multi-attacks by a typical warhead were conducted with 10 groups different circular error probable(CEP)to discuss the effects of the CEP and strike times on the damage and penetration depth.The numerical results demonstrate that the damage evolution caused by the subsequent projectile penetration and explosion continues to develop along the damage area caused by the first projectile penetration.The penetration depth gradually increases as the number of strike increases.The penetration depth calculated with explosion is larger than that calculated without explosion when the CEP is same during multi-attacks.When CEP is equal to 3 m and 1 m,the relative penetration depth is about 1.2 and 1.7,respectively.In other words,the relative penetration depth increased with decreasing of the CEP.The research conclusion shows that the design method of shielding layer thickness in the existing protective design code is dangerous subjected to multi-attacks.关键词
错位多次打击/超高性能混凝土/损伤/相对侵彻深度Key words
dislocation multi-attacks/ultra-high performance concrete(UHPC)/damage/relative penetration depth分类
数理科学引用本文复制引用
宗香华,王银,孔祥振,姜雅婷,孙留洋,袁俊成,杨涛春..错位多次打击下UHPC靶体损伤破坏效应的数值模拟研究[J].高压物理学报,2024,38(3):158-170,13.基金项目
国家自然科学基金(52178515) （52178515）
爆炸冲击防灾减灾国家重点实验室基金(FYKY-2022-01-33) （FYKY-2022-01-33）
