基于CEEMDAN-Hilbert变换的水下爆炸信号时频分析方法研究
Research on Time-frequency Analysis Method of Underwater Explosion Signal Based on CEEMDAN-Hilbert Transform
樊涛 1王宪楠 1吴岩 1赵爽 1郭策安 1张健1
作者信息
- 1. 沈阳理工大学 装备工程学院,沈阳 110159
- 折叠
摘要
研究水下爆炸冲击波信号的时频特性,对于舰艇利用弹药水下爆炸信号对抗自导鱼雷具有重要的实际意义.本文针对EMD-Hilbert方法中经验模态分解(EMD)存在模态混叠的问题,提出CEEMDAN-Hilbert方法实现水下爆炸冲击波信号精确的时频分析.在水深100 m处单发炸药爆炸,产生爆炸信号的频率主要分布在56.5 kHz以下的低频段,特别是0～28.3 kHz以下的能量最大,高于56.5 kHz的能量较少.通过与EMD-Hilbert方法相比,CEEMDAN-Hil-bert方法在28.3～56.5 kHz频段的能量分布会更加明显,具有一定的优越性.
Abstract
The study on the time-frequency characteristics of underwater explosion shockwave sig-nals is of great practical significance for ships to utilize the underwater explosion signals of muni-tions against self-guided torpedoes.The CEEMDAN-Hilbert method is proposed to realize the accu-rate time-frequency analysis of underwater explosion shockwave signals in response to modal alias-ing in the empirical modal decomposition(EMD)of the EMD-Hilbert method.In a single explosion at the depth of 100 m in the water,the frequency of the generated explosion signal is mainly distrib-uted in the low frequency band below 56.5 kHz,especially the energy below 0～28.3 kHz is the largest,and the energy higher than 56.5 kHz is less common.By comparing with the EMD-Hilbert method,the energy distribution of CEEMDAN-Hilbert method in the frequency band of 28.3～56.5 kHz will be more obvious,which has certain superiority.
关键词
水下爆炸/CEEMDAN-Hilbert变换/Hilbert谱/本征模态分量Key words
underwater explosion/CEEEMDAN-Hilbert transform/Hilbert spectrum/eigenmode component引用本文复制引用
基金项目
辽宁省教育厅高等学校基本科研项目(LJKZ0272)
出版年
2024
NETL
NSTL
万方数据