基于小波分解的水中电爆炸冲击波波形重建方法研究

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振动与冲击 ›› 2021, Vol. 40 ›› Issue (5) : 149-153.

论文

谢宇超，周海滨，陶妍，王晨旭

作者信息 +

Reconstruction method of shock wave shape of underwater electric explosion based on wavelet decomposition

XIE Yuchao, ZHOU Haibin, TAO Yan, WANG Chenxu

Author information +

文章历史 +

摘要

水中金属丝电爆炸产生的冲击波，上升时间仅有数十纳秒，脉冲宽度仅为十几微秒，远小于化学炸药产生的冲击波，采用现有传感器对其进行精确测量非常困难。本文分析了冲击波波形形成过程，基于帕塞瓦尔时频域能量守恒定律，采用多尺度小波分解的方法，给出了一种冲击波波形重建方法。采用该方法对PCB138传感器实测的压力信号进行了重建，并与Müller-plate针式压力传感器得到的波形进行了比对。结果表明：重建后的信号更加接近真实波形，基于多尺度小波分解的波形重建算法，较基于傅立叶变换的重建算法，稳定性更好，准确度更高。

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.

导出引用

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[J]. Journal of Vibration and Shock, 2021, 40(5): 149-153

参考文献

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