Abstract:Underwater electrical wire explosion induced shock waves (SWs) have short rise times of several tens of nanoseconds and narrow pulse widths of several a dozen of microseconds, which are far less than SWs generated by traditional chemical explosion. Precise measurement of SWs with existing pressure probes are quite difficult. This paper analyzed the formation process of underwater SWs. Based on the Parseval’s energy conservation law and the multi-scale wavelet decomposition algorithm, a new SW waveform recon-struction method is given. The pressure waveforms obtained by the PCB138 probe were reconstructed, and the reconstruction accuracy has been verified by the signals obtained by the Müller-plate probe. Recon-struction results show that the reconstructed waveforms are more accurate and closed to the real one. The waveform reconstruction method based on multi-scale wavelet decomposition technology is more reliable and accurate than that based on traditional FFT method.
谢宇超,周海滨,陶妍,王晨旭. 基于小波分解的水中电爆炸冲击波波形重建方法研究[J]. 振动与冲击, 2021, 40(5): 149-153.
XIE Yuchao, ZHOU Haibin, TAO Yan, WANG Chenxu. Reconstruction method of shock wave shape of underwater electric explosion based on wavelet decomposition. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(5): 149-153.
[1] Zhou H, Zhang Y, Han Y, et al. Signal Analysis and Waveform Reconstruction of Shock Waves Generated by Underwater Electrical Wire Explosions with Piezoelectric Pressure Probes[J]. Sensors, 2016, 16(4) :573.
[2] Grinenko A, Efimov S, Fedotov A, et al. Efficiency of the shock wave generation caused by underwater electrical wire explosion[J]. Journal of Applied Physics, 2006,100(11):113509.
[3] Grinenko A, Sayapin A, Gurovich V T, et al. Underwater electrical explosion of a Cu wire[J]. Journal of Applied Physics, 2005,97(2):23303.
[4] Fedotov-Gefen A V, Krasik Y E. Polarimetry and Schlieren diagnostics of underwater exploding wires[J]. Journal of Applied Physics, 2009,106(9):93303.
[5] Oshita D, Hosseini S H R, Mawatari K, et al. Two Successive Shock Waves Generated by Underwater Pulse Electric Discharge for Medical Applications[J]. IEEE Transactions on Plasma Science, 2014,42(10):3209-3214.
[6]张显丕. 水下爆炸压力测量不确定度研究[D]. 中国舰船研究院, 2014.
ZHANG Xian-pi. Research on Uncertainty of Underwater Explosion Pressure Measurement [D]. Beijing: Ship Research & Development Academy, 2014.
[7] 张显丕,刘建湖,潘建强等. 水下爆炸压力传感器技术研究综述[J]. 计算机测量与控制,2011,19(11): 2600-2602, 2606.
ZHANG Xian-pei, LIU Jian-hu, PAN Jian-qiang, et al. Overview on Techniques of Underwater Explosion Pressure Sensors[J]. Computer Measurement & Control, 2011,19(11):2600-2602, 2606.
[8] Grinenko A, Efimov S, Fedotov A, et al. Addressing the problem of plasma shell formation around an exploding wire in water[J]. Physics of Plasmas, 2006,13(5):52703.
[9] Grinenko A, Gurovich V T, Krasik Y E, et al. Addressing water vaporization in the vicinity of an exploding wire[J]. Journal of Applied Physics, 2006,100(11):113309.
[10] 晁攸闯. 水中金属丝电爆炸产生的冲击波特性数值模拟与实验研究[D]. 西安: 西安交通大学, 2015.
CHAO You-chuang. Numerical and Experimental Study of Shock Waves Generated by Underwater Electrical Wire Explosion[D]. Xi'an: Xi’an Jiaotong University, 2015.
[11] Grinenko A, Sayapin A, Gurovich V T, et al. Underwater electrical explosion of a Cu wire[J]. Journal of Applied Physics, 2005,97(2):23303.
[12] 汤文辉. 冲击波物理[M]. 科学出版社, 北京, 中国, 2011.
TANG Wen-hui. Shockwave physics [M]. Science Press, Beijing, China, 2011.
[13] Gundersen R M. Formation and Decay of Shock Waves [M]. Springer, Berlin Heidelberg, 1964.
[14] Cassen B, Stanton J. The Decay of Shock Waves[J]. Journal of Applied Physics, 1948,19(9):803.
[15] 张云娇. 水下冲击波数据处理系统的设计与实现[D]. 西安工业大学, 2014.
ZHANG Yun-jiao. Design and Implementation of Underwater Blast Wave Data Processing System [D]. Xi’an: Xi’an Technological University, 2014.
[16] Grinenko A, Gurovich V T, Krasik Y E, et al. Analysis of shock wave measurements in water by a piezoelectric pressure probe[J]. Review of Scientific Instruments, 2004,75(1):240.