摘要
分析混凝土结构在1/4模型中应变率对于爆炸相似律的影响,并用数值模拟的方法进行混凝土板的模爆方法研究,得出混凝土板在爆炸作用下复印比例定律近似成立的结论。考察数值模拟中产生计算误差的原因,发现混凝土板模型在采用4cm网格时会出现较大的计算偏差,其原因部分是由于网格尺寸引起的,部分是由于计算采用的混凝土局部损伤失效模型引起的。
The effect of strain rate in 1/4 model on blast scaling law was analyzed. The scaling method of simulation explosion test was studied by numerical simulation. Results from the simulation show that similarity of concrete slab subjected to the blast loading can be approximately obtained by using replica scahng law. The mesh size effect on the simulation was investigated. It is found that 4cm meshing results in worse deviations. The errors partly come from the local damage model for the concrete, partly from the coarse meshing.
出处
《国防科技大学学报》
EI
CAS
CSCD
北大核心
2007年第2期34-38,共5页
Journal of National University of Defense Technology
基金
国防科技大学基础研究项目(060201)
关键词
爆炸力学
混凝土板
模爆试验
数值模拟
explosive dynamics
concrete slab
scaling explosive test
numerical simulation
