平面冲击载荷下不同形式含柱壳结构的防护性能  

Protection Performance of the Various Structures with Cylindrical Shells under Plane Impact Loadings

作　　者：高光发[1,2,3] 李永池[3] 黄瑞源[3] 段士伟[3] 

机构地区：[1]安徽理工大学煤与瓦斯共采重点实验室,安徽淮南232001 [2]安徽理工大学能源与安全学院,安徽淮南232001 [3]中国科学技术大学近代力学系,合肥230027

出　　处：《土木建筑与环境工程》2012年第1期7-11,28,共6页Journal of Civil,Architectural & Environment Engineering

基　　金：武器装备探索研究(7131013);国家自然科学基金项目(50802092);国家人防科研"十一.五"规划项目;安徽理工大学博士科研基金(2011yb007)

摘　　要：以防护工程中新型分配层的设计为背景,对含单层和两层柱壳的混凝土结构中应力波的衰减和演化规律进行理论和数值分析,经过大量的计算发现,柱壳的纵向位置、层间距和排列形式对结构的削波性能有着较大的影响。计算结果表明:含单层柱壳时,柱壳距离被保护区域越近,结构的削波性能越好;当含双层结构时,被保护区域的应力时程曲线呈现明显的"驼峰"状,柱壳的层间距越小,结构对应力波的隔离效应越明显,且两层柱壳错开结构防护效果优于对齐结构。Aiming at the design for distribution layer in defense works,attenuation mechanism and evolution law of stress waves in distribution layer with cylindrical shells were focused on.It was found that dispersion and diffraction effect of stress waves were occurred in the concrete medium on the basis of theoretical analysis and numerical simulations,which significantly weakened the strength of stress waves behind the shells.The position、interlayer spacing and the arrangement forms of the shells had great influence on the protection performance of the structures.The results show： in the structures with single-layer cylindrical shells,the smaller the space between the shells and the protected area is,the better the protection performance is;in the structure with two-layer cylindrical shells,the smaller the interlayer spacing is,the better the protection performance is,and the protection performance of the stagger structure is better than that of the aligned structure.

关 键 词：抗爆设计 爆炸力学 防护工程 分配层 柱壳 应力波 结构 

分 类 号：TU927[建筑科学—建筑设计及理论] O383.2[理学—流体力学]