舱室内爆下舰船结构损伤的一种计算方法

A calculation method for ship structure damage under cabin explosion

为了评估舱室内爆多载荷耦合作用下舰船结构的损伤范围,设计了大尺度舱段模型,并开展了舱室内爆毁伤试验,试验后测量了舱室结构的破坏范围及破坏模式,分析了舱室内爆多载荷耦合作用下舰船结构的损伤机理,据此建立了舱室内爆下舰船结构损伤的计算方法。结果表明:(1)舱室内爆下形成的强冲击波载荷和准静态压力载荷可对舰船结构造成大范围的损伤,形成多种破坏模式;(2)舱室内爆下准静态压力载荷是舱室结构损伤破坏的主要毁伤元;(3)建立的舱室内爆载荷下结构损伤变形计算方法可同时考虑强冲击载荷和准静态压力载荷对结构的损伤破坏,理论计算结果与试验结果吻合较好。

The explosion of missiles penetrating the interior cabin could cause extensive damage to the warship structure.How to evaluate the damage range of the ship structure under the coupling of multiple loads in the inner explosion is a big challenge for engineering researchers.In order to establish a theory method of ship structural damage caused by cabin inner implosion,a large-scale cabin model was designed in this paper,and an inner explosion experiment was carried out on the cabin model.The damage range of the cabin structure was measured and typical failure models were acquired.The damage mechanism of the ship structure under the coupling effect of multiple loads(including extensive shock wave loading and quasi-static pressure loading)under inner implosion was analyzed.Based on experimental results,the theory method of ship structure damage range under inner blast was established.It was indicated that:(1)the cabin model would be subjected to shock wave and quasi-static pressure loadings after the explosive charge was detonated,which led to large area damage and complex failure models;(2)quasi-static pressure was the major destroying element for cabin model damage under inner blast;(3)the theory analysis method proposed by this paper simultaneously considered the coupling effect of shock wave and quasi-static pressure loadings for the damage of the cabin model,the theory results well coincided with the experimental ones.The established calculation method can be applied to evaluate the damage range of ship structure subjected to implosion loading.