Multi-fractal detrended fluctuation analysis of the blasting vibration signal in a frozen shaft

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (6) : 51-58.

FU Xiaoqiang1,2，YANG Renshu3，CUI Xiuqin1,2，LIU Xing1,2，LIU Jifeng1,2，LEI Zhen4

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Abstract

Considering that the multi-fractal analysis based on the partition function is not conducive to highlighting the local scale characteristics,the multi-fractal detrended fluctuation analysis (MF-DFA) method was introduced into the field of blasting vibration signal analysis.The results show that the vertical shaft blasting vibration signal has multi-fractal characteristics, the MF-DFA spectrum and multi-fractal singular spectrum have significant diversity for the explosive loading form in the cases of different settlement types of peripheral holes, so, they can be used as characteristic parameters to distinguish the structure form of peripheral charge.The MF-DFA spectrum diagram and related parameters can characterize the vibration response state of the shaft lining under different blasting schemes.The study provides an effective method for the identification and classification of blast hole charge structure and charge parameters.

Key words

blasting vibration / slotted cartridge / frozen shaft / multi-fractal detrended fluctuation analysis(MF-DFA) spectrum

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FU Xiaoqiang1,2，YANG Renshu3，CUI Xiuqin1,2，LIU Xing1,2，LIU Jifeng1,2，LEI Zhen4. Multi-fractal detrended fluctuation analysis of the blasting vibration signal in a frozen shaft[J]. Journal of Vibration and Shock, 2020, 39(6): 51-58

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