Energy Spectrum of Explosion Shock Wave Signals of Multi-layer Composite Charge

doi:10.3969/j.issn.1000-1093.2020.11.011

Abstract

Abstract: The explosion tests of multi-layer composite charge with different aspect ratios were carried out to study the energy spectrum characteristics of explosion shock wave of multi-layer composite charge in different frequency bands. The shock wave pressure signal measured in explosion test was analyzed by the theory of wavelet packet analysis. The energy spectra of shock wave pressure signals of composite charges with different aspect ratios and the rule of energy spectrum characteristics of shock wave pressure signal in different frequency bands were obtained from the analyzed results. The results show that the shock wave energy spectrum of composite charge increases with the rise of the aspect ratio of charge, the shock wave energy is mainly concentrated in the low frequency range, and the explosion shock waves of composite charges with different aspect ratios have different energy distributions and the distinct energy difference in different frequency bands. The low frequency band energy of the explosion shock wave for the close-range and large aspect ratio composite charge has a large percentage of energy growth. The total energy of the shock wave pressure signal of the multi-layer composite charge under the simultaneous internal and external initiation is 1.55 times of that of central initiation. The results of this research can provide reference for the design and damage effect assessment of controllable warhead with composite charge.

Key words: compositecharge, explosionshockwave, waveletpacket, energyspectrum, damageeffectassessment

CLC Number:

TJ410.3⁺41

HONG Xiaowen， LI Weibing， LI Wenbin， XU Heyang， LI Junbao. Energy Spectrum of Explosion Shock Wave Signals of Multi-layer Composite Charge[J]. Acta Armamentarii, 2020, 41(11): 2243-2251.

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