水下爆炸引起的混凝土坝危险性估计

Risk analysis of high concrete dam result from underwater explosion

由于水下爆炸强冲击作用,混凝土大坝将会产生一定程度的破坏。本文用经验公式计算了大计量炸药水下爆炸时作用在坝体上的冲击波压强,用ANSYS软件模拟了大坝作为弹性体在冲击波作用下的应力和应变场。从计算结果判断坝体在所有高程将可能贯穿性断裂。本文还对断裂后坝体运动作了定量估计。

Due to the action of strong shock loading induced by underwater explosion,the concrete dam will be damaged in different degrees.In this paper the pressure of shock wave acting on the dam was calculated using a common used empiric formula.The stress-strain and displacements of dam as elasticity body under the role of shock wave is simulated with ANSYS software.From these calculated results one may judge that the dam being cracked through the upstream dam face and downstream dam face at any elevation is possible.In the end,this paper quantitatively estimated the movement of fractured dam.The results show that a higher concrete dam under the action of underwater explosion will lead to a devastating catastrophe.