有限体积元法在安全壳抗爆数值模拟中的应用

Finite Volume Element Application in Containment Shell Numerical Simulation Under Blast Shock Wave

在对爆炸冲击波与结构的相互作用三维动态过程进行三维数值模拟时,仅用有限元法无法真实再现结构的动态响应过程。为了提高运算速度和精度,根据有限体积元法和有限单元法的特点,提出了将它们结合在一起应用于3-D数值模拟的新方法,介绍了该方法的特点,并以爆炸冲击波与结构的相互作用为例,对爆炸冲击波作用下核电站安全壳结构的动力响应进行了数值模拟,给出了混凝土结构的应力、位移、速度和加速度时程变化。

Interaction with blast shock wave and structure is a 3-D dynamic process. When it is simulated with numerical method, only finite element method can＇ t reappear material dynamic response. The paper presents a new method that the finite element and the finite volume approach are combined, and introduce its advantages. In the case of the interaction with blast shock wave generated from 3000kg effective blast yield and containment structure in nuclearpower plant, the paper simulates structure dynamic response and give results about effective stress, displacement ,velocity and acceleration and time curves.