基于阻抗的水面船基座冲击动响应折减方法  

Shock Dynamic Response Reduction Method of Surface Ship Basement by Impedance Method

作　　者：董九亭 刘建湖[1] 汪俊[1] 李海涛 刘国振[1] 杲涛 DONG Jiu-ting;LIU Jian-hu;WANG Jun;LI Hai-tao;LIU Guo-zhen;GAO Tao(China Ship Scientific Research Center,Wuxi,Jiangsu 214082,China)

机构地区：[1]中国船舶科学研究中心

出　　处：《北京理工大学学报》2019年第8期808-812,824,共6页Transactions of Beijing Institute of Technology

基　　金：国家部委基础科研计划资助项目(JCKY2016207C021,B0820132045)

摘　　要：水下爆炸下舰载设备会引起冲击谱的谱跌现象.为研究舰载设备对基座处冲击环境的影响,首先用ABAQUS的频响分析计算基座和设备自身的机械阻抗,然后通过简化设备-基座动力学模型,推导基座的响应与系统中各部分机械阻抗的关系,最后根据稳态响应与瞬态响应的差异,利用机械阻抗得到设备安装对基座响应影响的折减公式.结果表明:基于阻抗的折减公式在大部分区域较规范中的折减公式能够更好地吻合试验数据.Equipment will cause spectrum dip effect under underwater explosion.In order to study the influence of installed equipment on shock environment,the impedance of basement and equipment were calculated by frequency response analysis of ABAQUS.And then the relationship between basement response and impedance was obtained by a simplified dynamic model of equipment-basement.Based on the difference between steady state response and transient response,a reduction formula to describe how installed equipment affects shock environment of basement was developed.The results show that the reduction formula based on impedance better agrees better with experiment data in most areas than other reduction formulas.

关 键 词：水下爆炸 谱跌 冲击阻抗 冲击动响应 

分 类 号：U663.7[交通运输工程—船舶及航道工程]