飞机对核安全壳撞击破坏效应的数值模拟

为了研究大型商用客机撞击核电站安全壳的破坏效应,通过建立精细化的空客A320以及岭澳核电站安全壳有限元模型,采用LS-DYNA软件对飞机撞击安全壳进行了数值模拟。分析结果表明:A320撞击力时程曲线出现3次明显的峰值,分别对应驾驶舱、引擎以及机翼(油箱)受撞击产生,其中引擎撞击导致最大峰值荷载。得到的撞击力时程曲线形状与已有研究结论相似,但因飞机型号、质量及撞击速度不同,撞击持续时间、峰值荷载大小及出现时刻存在明显差别。在飞机速度为100m/s撞击下安全壳损伤严重,撞击中心发生局部穿透并很有可能引发核泄漏。

Numerical simulation on response and damage of nuclear containment under aircraft impact

To analyze the damage failure of the nuclear containment under the impact of large aircrafts, the refined finite element models of aircraft A320 and the Lingao nuclear containment were established. The process of the impact was simulated by using the commercial finite element software LS-DYNA. The results show that there are three noticeable peaks in the process, corresponding to the impact of the cockpit, engines and wings(fuel tank) respectively. The maximum peak load is mainly caused by the impact of the engines. Compared with other related literatures, the impact load-time curve is similar. But the time duration and the peak load are obviously different for the differences of the aircraft type, mass and impacting velocity. Under the take-off and landing velocity of 100 m/ s,containment is seriously damaged and the impacting centre suffers localized perforation, very probably leading to nuclear leakage.