摘要
为了获得水下爆炸声信号的特征,采用Hilbert-Huang变换(HHT)方法分析实测的爆炸信号的时频特性。分析结果表明:该爆炸信号的能量集中出现在冲击波和气泡脉动时刻,在频域上主要集中在1kHz以下的低频段。通过与基于Fourier变换的声能流密度谱比较,发现Hilbert能量谱能更准确地描述爆炸信号的声压谱源级,具有推广应用价值。
In order to obtain the characteristics of underwater explosive sound signal,the time-frequency distribution of the measured explosion signal is analyzed by the Hilbert-Huang transform.Analysis results that the energy of the explosion signal main⁃ly occurs at the moment of shock wave and bubble pulsation and concentrates in the frequency domain below 1kHz.Compared with the acoustic energy flow density based on Fourier transform,it is found that Hilbert energy spectrum can describe the sound pres⁃sure spectrum level of the explosion signal more accurately,it has the value of popurlarization and application.
作者
江国进
曹亮
JIANG Guojin;CAO Liang(Unit 45,No.91388 Troops of PLA,Zhanjiang 524022)
出处
《舰船电子工程》
2020年第9期153-156,共4页
Ship Electronic Engineering
