Study on the characteristics of the underwater detonation acoustic signals of fiber-based detonating cord based on wavelet analysis and power spectrum
Jia Hu1,2; Shen Zhao-wu1
Author information+
1. Department of Modern Mechanics，University of Science and Technology of China，Hefei 230027，China;2. School of Civil Engineering and Architecture，Nanyang Normal University，Nanyang 473061，China
With a view to obtaining the characteristics of the underwater detonation acoustic signals of fiber-based detonating cord, the analysis of its sound pressure level is carried out in this paper based on the results of underwater explosion pressure tests. Then the paper discusses the energy distribution status of underwater detonation signals at different frequency ranges by analyzing the time frequency characteristics of those underwater explosion signals by adopting the wavelet transform method. The research results show that the underwater explosion of fiber-based detonating cord boasts a high level of acoustic power and that the energy of the underwater detonation signals of fiber-based detonation cord is mainly concentrated in the area of less than 40KHz, of which the highest level of energy is below the frequency of 5KHz. Therefore, if used as a source of sound interference, the fiber-based detonating cord is fully capable of covering all the working frequencies of various types of underwater acoustic equipment, as a result of which it may serve an important purpose in underwater warfare. By using wavelet analysis, reasonable researches can be made regarding the characteristics of the underwater acoustic signals of fire-based detonating cord so as to precisely and accurately analyze the characteristics of those signals.
Jia Hu;Shen Zhao-wu.
Study on the characteristics of the underwater detonation acoustic signals of fiber-based detonating cord based on wavelet analysis and power spectrum[J]. Journal of Vibration and Shock, 2011, 30(9): 243-247
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