炸药触地爆炸后核电站安全壳基底振动响应分析
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摘要
现代战争或恐怖活动中,核电站很可能受到精确制导炸弹的攻击。运用有限元软件LS-DYNA3D,以5000kg等效TNT当量的装药在安全壳100m外触地爆炸为例,将装药爆炸、土中传播和结构构成有限元分析体系,对安全壳基底的振动响应进行了分析。结果表明,安全壳基底和壳体的压力呈环状分布,在基底和壳体的连接处有明显的应力集中;等效应力-时程曲线和径向应力-时程曲线显示,壳体的最大等效应力为35kPa、最大径向应力为32kPa,均在安全范围。在给定的条件下,基底和壳体的响应值远未超出设计值,核电站的运行安全可靠。
In the modern war or terrorism,nuclear power station may greatly have been attacked by pinpoint general bomb. Using finite element software LS-DYNA3D,taking 5000kg munitions equivalent to TNT bombing 100m away from the nuclear power station as an example,while munitions explosion、propagation among soil together with structure constitution are regarded as a finite element analysis system,the vibration response of the containment foundation is analyzed. The result indicate that the pressure of foundation and containment is dispersed as ring,and the joint show stress focus. The time-history curve for Von-Mises stress and the time-history curve for radial stress show that the mix Von-Mises stress of the containment is 35 Kpa and the mix radial stress of the containment is 32 Kpa. Under the given condition,the response value of the foundation and containment is far smaller than the design value,the nuclear power station is safe and reliable。
In the modern war or terrorism,nuclear power station may greatly have been attacked by pinpoint general bomb. Using finite element software LS-DYNA3D,taking 5000kg munitions equivalent to TNT bombing 100m away from the nuclear power station as an example,while munitions explosion、propagation among soil together with structure constitution are regarded as a finite element analysis system,the vibration response of the containment foundation is analyzed. The result indicate that the pressure of foundation and containment is dispersed as ring,and the joint show stress focus. The time-history curve for Von-Mises stress and the time-history curve for radial stress show that the mix Von-Mises stress of the containment is 35 Kpa and the mix radial stress of the containment is 32 Kpa. Under the given condition,the response value of the foundation and containment is far smaller than the design value,the nuclear power station is safe and reliable。
引文
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[6]屈铁军,陈厚群.强地震作用下核电站控制棒下落时间分析[J].计算力学学报,2001,18(3):32-35.QU Tie-jun,CHEN Hou-qun.Control rod drop time analysis for the nuclear power plant under action of strong earthquake[J].Chinese Journal of Computational Mechanics,2001,18(3):32-35.
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[8]白金泽.LS-DYNA3D理论基础与实例分析[M].北京:科学出版社,2005.
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[10]王天运,任辉启,刘水江,等.核电站遭袭后果分析[R].总参工程兵科研三所,2003.
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