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针对大型空间结构是人群密集场所而易遭受爆炸袭击的问题,提高大跨度空间结构的抗爆能力,应用仿真软件对爆破、冲击下大跨度空间结构高度非线性动力学问题进行模拟仿真非常必要。据此综合分析爆炸荷载特点,建立爆炸荷载模型,利用有限元软件ANSYS/LS-DYNA对在爆炸荷载作用下的单层球面网壳结构进行数值模拟,得出结构在外部爆炸荷载下的结构动力响应,单层球面网壳结构在跨度确定的条件下,矢跨比变化对结构的动力响应影响比较显著,矢跨比大的结构抗爆性能相对较好。
In order to solve the problem that large-scale space structure is crowded place and vulnerable to blast attack, it is necessary to improve the anti-blast capability of long-span space structure. Simulation software is used to simulate the highly nonlinear dynamic problem of long-span space structure under blasting and impacting. Based on the analysis of the characteristics of the explosion load, the explosive load model was established. The finite element software ANSYS / LS-DYNA was used to simulate the single-layer spherical reticulated shell under the action of explosion load. The structural dynamic under the external explosion load was obtained In response, the dynamic response of the single-layer spherical reticulated shell to the structure is more significant under the condition of the span being determined, and that of the large span-to-span ratio structure is relatively good.