商用飞机撞击核电站屏蔽厂房数值模拟

为研究大型商用飞机撞击核电站屏蔽厂房的毁伤特性，建立了Boeing 767商用飞机和双钢板混凝土屏蔽厂房的有限元模型，模拟两者的相互撞击作用过程，得到飞机不同部位(机身、发动机)对屏蔽厂房的撞击力时程曲线，对每一个作用部分给出简化撞击力曲线和作用面积，确定了撞击力分布形式。结果分析表明:飞机轴向网格尺寸对撞击力影响较大；屏蔽厂房被撞击部位变形明显，其他区域变形较小；撞击速度对撞击作用时间影响较小，而对结构响应位移影响很大，撞击力合力随着撞击速度的降低迅速下降。

Numerical investigation of shield building for nuclear power plant subjected to commercial aircraft impact

To study damage characteristics of the shield building for nuclear power plant subjected to a large commercial aircraft impact, finite element models for Boeing 767 commercial aircraft impacting on a shield building made of steel-concrete-steel sandwich panels are established to simulate the impact process. The following results were achieved: the aircraft's axial mesh size greatly influences the impact force; some parts of the shield building hit by the aircraft undergo significant deformations while the deformation is smaller in the other parts; the impact velocity has little effect on the impact duration but a great effect on the structural response displacement, and the total impact force rapidly declines with the impact velocity decreasing. The impact force arising from different parts of the aircraft hitting the shield building are given, the simplified curve and the load area of different impact forces are obtained, which will contribute to the determination of the impact force distribution form, thus providing a positive help to the engineering design of shield buildings.