水下爆炸下舰艇不同部位冲击环境数值分析  

Numerical analysis on shock environment in different ship regions subjected to underwater explosion

作　　者：董九亭 刘建湖[1] 汪俊[1] 刘国振[1] DONG Jiuting;LIU Jianhu;WANG Jun;LIU Guozhen(China Ship Scientific Research Center,Wuxi 214082,China)

机构地区：[1]中国船舶科学研究中心,江苏无锡214082

出　　处：《中国舰船研究》2018年第5期32-38,共7页Chinese Journal of Ship Research

基　　金：国防基础科研计划资助项目(JCKY2016207C021;B0820132045)

摘　　要：[目的]水下爆炸下的舰艇冲击环境是舰用设备抗冲击设计和评估的基础输入。[方法]采用数值方法研究某型船在水下爆炸下不同位置的冲击环境,流固耦合作用采用二阶双重渐近法(DAA_2)。首先选取不同的阻尼比等参数,然后使用不同安装频率的弹簧振子模拟弹性设备。[结果]研究获得了典型位置处与实船相吻合的冲击谱结果,并验证了DAA_2法的准确性和可靠性。在相同冲击输入下,利用振子计算得到不同安装位置的冲击响应并转换得到冲击环境,分析得到了冲击环境在全船上的分布和衰减规律。[结论]研究结果可为舰船设备抗冲击设计提供参考。[Objectives]The shock environment of a warship in an underwater explosion is the basic input for the design and shock resistance ability evaluation of ship equipment.[Methods]In this paper,a numerical simulation is used to analyze the shock environment in different regions of a ship,and the Second-order Doubly Asymptotic Approximation(DAA2)is used to solve the fluid-structure interaction.First,the appropriate calculating parameters are chosen,such as damping ratio,and then a series of Single-Degree-of-Freedom(SDOF)systems are attached at various deck locations to simulate flexible equipment.[Results]The accuracy and reliability of DAA2 is verified by the fact that the calculated shock spectrums at classic regions perfectly match the data of the ship shock trial.The shock response of the SDOF systems under the same shock input are then calculated and transformed into the shock environment.Finally,the results of shock environments in different regions are compared.[Conclusions]The conclusions of this paper can provide design reference data for the subsequent anti-shock design of equipment.

关 键 词：水下爆炸 流固耦合 冲击环境 数值模拟 设备抗冲击 

分 类 号：U661.4[交通运输工程—船舶及航道工程]