CAJ | 학술논문

　　为了研究水下爆炸声信号的特征，进行了水下爆炸试验，并基于 Hilbert-Huang 变换(HHT)法对试验数据进行处理，得到了水下爆炸声信号的 Hilbert 谱。根据 Hilbert 谱对水下爆炸声信号进行分析，并对能量局部极值点的形成机理进行了探讨。结果表明， Hilbert谱能够清晰地表示出水下爆炸声信号的频率分布规律和能量的时频特性，局部极值点的形成是由于声线轨迹和海底相互作用的结果。
　　위료연구수하폭작성신호적특정，진행료수하폭작시험，병기우 Hilbert-Huang 변환(HHT)법대시험수거진행처리，득도료수하폭작성신호적 Hilbert 보。근거 Hilbert 보대수하폭작성신호진행분석，병대능량국부겁치점적형성궤리진행료탐토。결과표명， Hilbert보능구청석지표시출수하폭작성신호적빈솔분포규률화능량적시빈특성，국부겁치점적형성시유우성선궤적화해저상호작용적결과。
A test was conducted to study the characteristics of underwater explosion acoustic signals. The test data are processed in this paper with the Hilbert-Huang transform(HHT) method to obtain the Hilbert spectrum. According to the Hilbert spectrum, the underwater explosion acoustic signals are analyzed, and the formation mechanism of local energy extreme point is discussed. The results indicate that the Hilbert spectrum can show the frequency distribution and the time-frequency characteristic of energy of the underwater explosion acoustic signals. Local energy extreme point is formed due to interaction of acoustic ray trajectories and sea bottom.