不同装药形式混凝土自由场应力波衰减规律的数值分析  

NUMERICAL ANALYSIS ON ATTENUATION LAW OF FREE-FIELD STRESS WAVE IN CONCRETE OF DIFFERENT EXPLOSIVES

作　　者：廖铁平[1] 张尚根[1] 周早生[1] 刘纪军[1] 杨秀敏[2] 

机构地区：[1]解放军理工大学工程兵工程学院,南京210007 [2]总参工程兵第四科研所,北京100850

出　　处：《工业建筑》2007年第z1期230-233,共4页Industrial Construction

摘　　要：采用LS-DYNA软件,根据试验结果,模拟条形装药接触爆炸下混凝土自由场的应力波衰减规律,得到各种材料模型参数,并给出三种不同装药形式混凝土中应力峰值与加速度峰值随距离变化的衰减规律。根据曲线拟和,得到其应力峰值与加速度峰值的衰减指数。计算结果表明,条形和柱形装药形式对应力波衰减特性影响不大,而球形装药形式影响较大。According to the experimental result,the attenuation law of free-field stress wave in concrete of rectangle explosives was simulated by the LS-DYNA software. The variable material models and the attenuation law of the stress and the acceleration with the distance of three kinds of explosives form were obtained.The attenuation index of the stress peak value and the acceleration peak value were received by the curve simulation.The result of the numerical simulation shows the influence on the attenuation of the stress wave of rectangle and cylindrical explosives are not important,but that on the spherical explosive is more important.

关 键 词：数值模拟 混凝土 自由场 应力波衰减规律 

分 类 号：TU528[建筑科学—建筑技术科学]