Application of variable mode decomposition in the removal of blasting signal trend items

JIA Bei; LING Tianlong; HOU Shijun; LIU Dianshu; WANG Xiao

doi:10.11883/bzycj-2019-0092

Volume 40 Issue 4

Apr. 2020

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JIA Bei, LING Tianlong, HOU Shijun, LIU Dianshu, WANG Xiao. Application of variable mode decomposition in the removal of blasting signal trend items[J]. Explosion And Shock Waves, 2020, 40(4): 045201. doi: 10.11883/bzycj-2019-0092

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JIA Bei, LING Tianlong, HOU Shijun, LIU Dianshu, WANG Xiao. Application of variable mode decomposition in the removal of blasting signal trend items[J]. Explosion And Shock Waves, 2020, 40(4): 045201. doi: 10.11883/bzycj-2019-0092

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Application of variable mode decomposition in the removal of blasting signal trend items

doi: 10.11883/bzycj-2019-0092

1.
School of Resource and Safety Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
2.
Beijing Zhongda Blasting Engineering Co. Ltd., Beijing 102299, China

Received Date: 2019-03-26
Rev Recd Date: 2019-11-26
Publish Date: 2020-04-01

Abstract

Abstract

Accurate removal of signal trend items is of practical importance for improving the accuracy of blasting vibration signal analysis. Here, aiming at the defects of EMD identification, such as mode aliasing and terminal effect, a method based on variational mode decomposition (VMD) to remove signal trend term is proposed. The principle of identifying the trend term of blasting signals by VMD method is described in details, and the simulation experiment was carried out. The results show that the influence of the trend term frequency on the decomposition effect is relatively small. When the trend term frequency is between 1 and 5 Hz, the effect of the frequency on the decomposition effect remains basically the same. The amplitude has a significant influence on the decomposition effect. Furthermore, the amplitude is smaller, the decomposition effect of the VMD method is worse. When the amplitude of the trend term exceeds 1/3 of the maximum amplitude of the original blasting signal, the VMD method has a better decomposition effect. Finally, the VMD method and the EMD method are applied to process the measured blasting vibration signal containing the trend term. Compared with the EMD method, the signals processed by the VMD method are basically consistent and have no terminal effect, and have wider applicability in the field of blasting signal trend item removal.
- tunnel engineering,
- blasting vibration,
- variational mode decomposition (VMD),
- trend term

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