大型商用飞机撞击钢板混凝土结构安全壳的有限元分析

为研究不同场地条件对大型商用飞机撞击核电厂结构的冲击响应影响，采用规范推荐的集总参数场地动力模型考虑不同的均质场地条件。基于荷载时程分析法进行了某大型商用飞机撞击钢板混凝土结构安全壳的冲击响应对比分析。分析结果表明，随场地剪切波速的增大，安全壳的冲击响应减小，当考虑为固定端时，其响应最小；当场地的剪切波速较大，即场地较硬时，假设为固定端的边界条件是合理的，当场地较软时，应考虑场地的弹性作用；场地阻尼效应对于冲击响应的影响很小，可忽略不计。针对某特定场地，大型商用飞机对钢板混凝土结构安全壳的冲击响应较小，不会引起结构的整体破坏，是可接受的。

FEM Analysis of Steel-plate Concrete Containment against Large Commercial Aircraft

In order to study the influence of different site conditions on the impact response of commercial aircraft impacting on the structure of nuclear power plant, the lumped parameter site dynamic model recommended by the code was used to consider different homogeneous sites. Comparison analysis of impact response of a large commercial aircraft impacting on the steel-plate concrete containment was carried out based on force time-history analysis method. The results show that with the increase of shear wave velocity of site, the impact response of the containment decreases, and when the fixed constraint of bottom nodes of raft foundation is considered, the response is the smallest. When the shear wave velocity of site is large enough (ie. the site is hard enough), the fixed boundary condition is reasonable. When the site is soft, the elastic effect of the site should be considered. The effect of site damping effect on impact response is negligible. For a specific homogeneous site, the impact response of the large commercial aircraft to the steel-plate concrete containment is small, which will not cause the overall damage of the structure, and is acceptable.