摘要
圆柱壳是船舶、潜艇和海洋工程结构物的重要组成部分,研究其在水下爆炸载荷作用下的响应对提高结构物的使用周期有着重要的作用。基于商用有限元软件ABAQUS对圆柱壳水下爆炸进行了数值模拟,得到水下爆炸载荷作用下圆柱壳关键部位的冲击环境,为结构冲击响应信号的分析提供输入条件,然后对仿真数据进行了一维离散小波分析,提取了信号的细节特征。分析结果表明:小波分析是分析水下爆炸信号的有效方法,能提取信号变化的细节特征。运用小波来分析水下爆炸信号较传统分析方法更能适应水下爆炸信号突变快、衰减快的特征,同时为进一步认识水下爆炸机理、破坏原因的确定提供了新的途径。
The cylinder shell is an important component of ship and submarine and structure of ocean engineering.Studying its response on underwater explosion load is very important for increasing the lifecycle of structure.Based on the software ABAQUS simulating the cylinder shell structure on underwater explosion,the shock environment of key part of cylinder shell were obtained,which provides the input for the shock signal analysis,then using the one-dimensional discrete wavelet to analyze numerical simulation data and extracting the detail features of the signals.The results show that the wavelet analysis is an effective way to analysis underwater explosion signals and can extract the detail features of signal changes.The wavelet analysis applied in underwater explosion is more suitable of the sudden changing and attenating quickly characteristic of signals compared with the tradition analysis method,and also providing a new way to further research on the mechanism of underwater explosion.
出处
《爆破》
CSCD
北大核心
2010年第4期18-21,共4页
Blasting
基金
海军装备部预研项目(A3820061202)
关键词
水下爆炸
数值模拟
冲击响应
小波分析
圆柱壳
underwater explosion
numerical simulation
shock response
wavelet analysis
cylinder shell
