圆柱壳在水下爆炸气泡作用下的动态塑性响应研究

Investigation of the dynamic responses of cylindrical shell subjected to underwater explosion bubble

圆柱壳是潜艇的主要结构单元,其在水下爆炸作用下产生的动态塑性响应是潜艇破坏的主要因素之一,因此研究其水下爆炸动态塑性响应有助于深入了解圆柱壳结构的失效规律和机理,对于提高潜艇的生命力和战斗力以及改良水中兵器战斗部装药设计有着重要的意义。文章首先根据Geers-Hunter的水下爆炸气泡集成的双重渐近模型进行数值求解,得到的结果很好地模拟了水下爆炸载荷从冲击波到第一次气泡脉动的整个过程。然后利用ABAQUS软件,将圆柱壳简化成一根梁,并从圆柱壳在水下爆炸气泡作用下产生的塑性铰的个数这一角度,当气泡第一次脉动频率与圆柱壳梁模型的第一、二阶固有频率接近时,对圆柱壳在水下爆炸气泡作用下的动态塑性响应进行了探索性的研究。

The cylindrical shell is the primary component of the submarines.The research on the dynamic plastic responses of the cylindrical shell to various underwater explosions can help to profoundly find out its disabled rules and mechanism,and is of great importance in enhancing the survivability and battle ef-fectiveness of the submarines and improving the design of the charge of the weapons immerged in the wa-ter.In this paper,firstly,Geers-Hunter’s integrated wave-effects model for an underwater explosion bub-ble is computed numerically.The solution well simulates the whole process of the load of an underwater ex-plosion from the shock wave to the first bubble pulse.Then the cylindrical shell is simplified to be a beam by ABAQUS code.And the dynamic plastic responses of the cylindrical shell attacked by various underwa-ter explosion bubbles are studied exploringly when the first pulse frequency of the bubble is close to the first and second connatural frequency of the beam model of the cylindrical shell,according to this point of view the number of the hinge forming on the model is obtained.