Energy Distribution Analysis of Explosive Shockwave Pressure Based on Preferred Wavelet Packet and Wigner-Ville Distribution
Special Issues Editor (Nottingham Tent University, United Kingdom (Great Britain))
Energy distribution is an important factor in evaluating damage effectiveness of explosive blast, including overpressure and impulse. It means that the higher the energy in certain frequency zone, the higher effective of damage to the target which has the same nature frequency zone. However, the energy extraction for explosive blast is quite difficult because it's steep rising, short duration and with a lot of conference signals. Therefore, a new energy analysis method based on preferred wavelet packet and Wigner-Ville distribution (WVD) is proposed. In this paper, firstly, we construct the wavelet packet to reduce the noise of signal, and then decompose the original signal, later calculate the energy spectra through the wavelet packet. Secondly, the WVD is introduced to extract the frequency and amplitude characteristics of each period of shockwave signal. Finally, three measured signals are taken as examples to verify the effectiveness and reliability of proposed method. Taking into account nature frequency of specific targets, this method can provide reference for achieving high efficiency damage of explosive blast.
Journal: International Journal of Simulation: Systems, Science & Technology, IJSSST V17
Published: Jul 14, 2016