舰船局部板架结构在水下爆炸冲击波下动态响应的相似律研究  

SCALING LAW OF DYNAMIC RESPONSE OF STIFFENED PLATES FOR A SHIP SUBJECTED TO UNDER WATER SHOCK

作　　者：张振华[1,2] 陈平毅 漆万鹏 王乘[1] 朱锡[2] 

机构地区：[1]华中科技大学土木工程与力学学院,武汉430074 [2]海军工程大学船舶与海洋工程系,武汉 [3]海军驻武汉438厂军代表室,武汉430060

出　　处：《振动与冲击》2008年第6期81-86,共6页Journal of Vibration and Shock

基　　金：国家安全重大基础研究项目资助

摘　　要：首先分析舰船局部板架结构在水下爆炸冲击波作用下的结构吸能机理。在此基础上确定了影响结构最终塑性变形的相关物理量。利用Π定律对该问题进行相似分析。针对是否计及材料应变率强化效应的两种情况,提出了模型和原型的相似条件,并对考虑应变率强化效应时利用模型预报原型最终塑性变形的误差和影响因素进行了分析。结论可以用于指导舰船局部板架在水下爆炸冲击波作用下动态响应的模型试验,进而预报实船结构的最终塑性变形。Firstly,the mechanism of the energy absorbed by stiffend plates of a ship structure subjected to underwater explosion is presented.Variables that affect the dynamic response of the stiffend plates are defined.Π principle is used to analyze the scaling law between model and prototype.The requirements of scaling between the model and the prototype is put forward.Then,the error produced by the prediction of the dynamic response of the prototype with the model considering the strengthening effect of strain rate of materials is analyzed.Furthermore,the factors affecting this error,such as scaling factor and strain rate,are analyzed.The conclusion abtained can be used to guide scaling experiment of the stiffend plates subjected to underwater shock to predict the dynamic response of a real ship.

关 键 词：舰船 水下爆炸 局部板架 动态响应 相似律 应变率强化 

分 类 号：U661.43[交通运输工程—船舶及航道工程]