爆炸荷载作用下拱形结构的动力响应分析  

The Analysis of Arch Structure Subjected to Blast Loading

作　　者：冷冰林[1,2] 许金余[3] 段吉祥 徐杰[5] 

机构地区：[1]95080部队 [2]中国航空港建设第九工程总队 [3]空军工程大学工程学院 [4]南京军区空军勘察设计院 [5]95538部队

出　　处：《弹箭与制导学报》2010年第3期59-62,共4页Journal of Projectiles,Rockets,Missiles and Guidance

基　　金：国家自然科学基金(10372084)资助

摘　　要：为了比较三种不同材料拱形结构的抗爆炸性能,利用ANSYS/LS-DYNA3D有限元软件,采用流固耦合算法,对拱形结构在内部爆炸载荷作用下的爆腔形成和发展规律等动力响应问题进行了数值模拟。结果表明:RPC拱形结构的单元较钢纤维和岩石拱形结构的单元能承受更大的主应力,其单元具有更强的能力吸收爆炸所释放的能量,因而RPC拱形结构具有更高的防震塌能力以及结构的完整性。For comparing the anti-explosion performance of three different material arc structures, the corresponding numerical simulation was conducted by using element program LS-DYNA3D. The arbitrary Lagrangian-Eulerian （ALE） algorithm was used to simulate the dynamical matter, such as the forming process and development disciplinarian of explosive cavity. According to simulation, the propagation of the stress wave and the influences of soil layer were studied, the size of blast pit, the damage form, stress contour, pressure-time curve and energy-time in three different material arc structures were comparatively analyzed. The research shows that the RPC arc structure element can endure more principal stress, so it holds the stronger capability to absorb the energy from explosion, thus the RPC arc structures possess the predominant capability of the prevent-collapse and integrality of the structure.

关 键 词：爆炸 混凝土 数值模拟 有限元 爆炸空腔 

分 类 号：O383[理学—流体力学]