参数对冲击波作用下船体梁变形的影响特性  

Effects of parameters on plastic deformation of hull girder subjected to underwater explosion shock wave

作　　者：李海涛[1] 朱锡[2] 楼京俊[1] 张振海[1] 

机构地区：[1]海军工程大学科研部,湖北武汉430033 [2]海军工程大学船舶与动力学院,湖北武汉430033

出　　处：《华中科技大学学报（自然科学版）》2010年第10期100-103,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家重大基础研究基金资助项目(51335020102)

摘　　要：将船体结构简化为刚塑性等截面直梁,提出了一种计算船体梁在近场爆炸冲击波作用下发生整体塑性运动响应的理论模型.以该理论模型为基础,研究了船体梁在近场爆炸冲击波作用下的一般运动响应特性,分析了不同爆炸工况及结构几何参数对响应特性的影响.结果表明:在常见爆炸工况下,船体梁的塑性变形表现为先正向上升,后反向下降的过程,并且以反向变形损伤为主;同一爆炸工况下,船体梁的最终塑性变形量与极限弯矩、长度、宽度以及底板厚度之间呈线性关系.Warship＇s hull being simplified as a rigid, perfectly plastic uniform beam floating on water, a theoretical method was proposed to describe how the beam acts on the blasts. On the basis of the theoretical model, the general dynamic response of the hull girder subjected to shock waves in near field was analyzed, and effects of explosion conditions and girder＇s dimensions on dynamic response were discussed. Results show that in common explosion conditions, the girder＇s plastic deformation take a course of firstly upward, then downward movement, and it finally takes a downward bending damage. In the same explosion condition,a linear relation can be found between girder＇s plastic limit bending moment, length, width, soleplate thickness and final plastic deformation.

关 键 词：船体梁 爆炸力学 水下爆炸冲击波 动态响应 理论模型 

分 类 号：U661.7[交通运输工程—船舶及航道工程]