内部爆炸荷载下网壳结构的抗爆防护措施

Protective measures for reticulated shell subjected to internal blast loading

摘要:

为进行内部爆炸荷载作用下网壳结构的抗爆防护措施研究,运用有限元软件ANSYS/LS-DYNA建立了包含网壳杆件、檩托、檩条、铆钉、屋面板、墙体和地面在内的精细化K8型单层球面网壳模型,通过流固耦合算法使爆炸冲击波与结构相互作用,分析了局部杆件加固、屋面板的选取及墙体开洞等抗爆防护措施的效果,结果表明内部爆炸荷载作用下,通过对网壳外环杆件进行加固、选择轻质的薄屋面板、增大墙体开洞面积、增高墙体洞口位置及减小墙体洞口间距等措施,能够有效降低网壳结构的动力响应．

Abstract:

To know the function of protective measures for reticulated shell subjected to internal blast loading, a fine finite element model for Kiewitt8 single-layer reticulated shell which contained reticulated shell member, purlin hanger, purlin, rivet, roof boarding, wall and ground was established by using finite element software ANSYS/LS-DYNA. The effect of reinforcement for reticulated shell member, selection of roof boarding and openings in the wall was studied by using ALE (Arbitrary-Lagrange-Euler) algorithm. The results showed that by selecting the outer-loop members to reinforce, choosing light roof boarding or thin roof boarding, increasing the opening rates and the height of position, and reducing the opening spacing, the dynamic response of the reticulated shell under internal blast loading could be reduced effectively.