CAJ | 학술논문

利用ANSYS/LS-DYNA动力有限元软件平台建立了包含网壳杆件、檩托、檩条、铆钉、屋面板、墙体和地面在内的40 m跨度精细化典型K8单层球面网壳结构有限元模型，采用流固耦合算法对结构在内部偏心爆炸荷载作用下的动力响应进行了有限元数值模拟研究，得到了网壳结构在偏心爆炸荷载作用下的四种响应模式：结构无损伤、构件塑性发展、网壳大变形、泄爆型破坏。获得了不同爆炸点位置、杆件截面、矢跨比、支承条件、屋面板厚度等参数条件下的结构动力响应结果，通过对比分析，总结了各参数对结构动力响应的影响程度与规律，为网壳抗爆防御设计提供了依据。
이용ANSYS/LS-DYNA동력유한원연건평태건립료포함망각간건、름탁、름조、류정、옥면판、장체화지면재내적40 m과도정세화전형K8단층구면망각결구유한원모형，채용류고우합산법대결구재내부편심폭작하재작용하적동력향응진행료유한원수치모의연구，득도료망각결구재편심폭작하재작용하적사충향응모식：결구무손상、구건소성발전、망각대변형、설폭형파배。획득료불동폭작점위치、간건절면、시과비、지승조건、옥면판후도등삼수조건하적결구동력향응결과，통과대비분석，총결료각삼수대결구동력향응적영향정도여규률，위망각항폭방어설계제공료의거。
Dynamic finite element software ANSYS/LS-DYNA was used to set up a typical finite element model for a Kiewitt8 single-layer reticulated shell containing reticulated shell member,purlin hanger,purlin,rivet,roof boarding, wall and ground.The dynamic response of the structure subjected to internal eccentric blast loading was studied by using ALE (Arbitrary-Lagrange-Euler)algorithm.Four response types were defined,they were:no impairment,member plastically developing,large deformation of reticulated shell and destruction with explosion relief.The response rules of the structure under internal eccentric blast loading with variation of explosion point position,section size of reticulated shell member,rise-span ratio,supporting condition and thickness of roof boarding were obtained through comparisons of plastic strains,plastic development levels and displacements of the structure.The results provided a theoretical basis for reasonable defense and anti-blasting design of reticulated shell structures.