Time-Frequency Analysis of Underwater Explosion Signal by CEEMDAN-Hilbert Transform

This paper studies the characteristics of the underwater explosion signal characteristics and analysis of it by proposing the CEEMDAN-Hilbert method. The research can provide the theoretical basis for the ship's use of explosives to fight the sound torpedo. We use the CEEMDAN method to process the simulated underwater explosion signal and the actual underwater explosion signal mixed ship signal. The results show that the CEEMDAN decomposition method is highly adaptable.It can be seen through analysis of the Hilbert spectrum. When the water depth is 200m, the energy of the underwater explosion signal is mainly concentrated within 50.9kHz. When two explosives are detonated at the same time, it is relatively widely distributed between 25.4kHz. The energy above 50.9kHz is relatively small. The actual data is also a strong display of the low frequency part after the signal decomposition.The CEEMDAN-Hilbert method proposed in this article is suitable for analysis of underwater explosion signals.