摘要
根据混凝土中C-J爆轰理论,用AUTODYN软件分别对1、2、4、5点装药在混凝土中的同步爆炸进行了数值模拟。通过数值仿真所得数据,分别从爆炸应力波和爆炸能量角度研究了多点爆炸能量聚集效应。结果表明:在相同装药当量条件下,多点爆炸应力波在装药对称位置发生相互作用压力叠加,造成混凝土变形能密度及内能密度较单点爆炸时显著下降,提高了装药的能量利用率,从而导致多点起爆毁伤区域较单点爆炸时增大。另外,由无量纲分析建立了较合理的能量耦合系数模型,为混凝土中多点爆炸毁伤效果提供理论依据。
Based on the C-J detonation theo13,,the simultaneous explosion effects of 1,2,4,5 charges in concrete were calculated by AUTODYN software. According to the data obtained from numerical simulation, the energy gather- ing effect of multi-point explosion was studied from the view of blast stress wave and explosion energy. Results indica- ted that, on the condition of same equivalent weight charges, the interaction stress superposition of multi-point explo- sion in charge symmetrical positions decreased the deformation energy density and internal energy compared to the single explosion, and improved the energy utilization of charge, which increased the damage area in the same situation of multi-point initiation when compared with single point explosion. In addition, a reasonable model for energy cou- pling coefficient was built according to dimensional analysis and provided a theoretical basis for damage effect of muhi-point explosion in concrete.
出处
《爆破》
CSCD
北大核心
2014年第1期19-24,81,共7页
Blasting
基金
国家部委基础研究计划(B1020110002)
关键词
爆炸力学
装药个数
应力波相互作用
数值模拟
混凝土
explosion mechanics
number of charge
stress wave interaction
numerical simulation
concrete
