基于阵列信号空频域分析的隧道衬砌开裂声波定位法

doi:10.11896/cldb.24030104

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Abstract Real-time monitoring of cracks plays a vital role in the long-term stability and normal operation of tunnels. It is conducive to the early warning and prevention of tunnel diseases. This work presents a new localization method based on the relationship between the phase difference in the frequency domain of array signal and the azimuth in the spatial domain of sound source. The sound wave generated by lining cracking radiates into the tunnel with the cracking point as the spherical center. The phase difference of the sound signal arriving at the triangle pyramid sensor array is linearly related to the frequency. And the slope is the trigonometric function of the orientation of sound source. The phase difference at multiple frequencies can be obtained in view of the wide frequency characteristics of the sound wave of the lining cracking. The slope can be obtained by linear fitting, and then the orientation of the sound source can be determined. Its three-dimensional coordinates can be determined by the intersection of the azimuth vector and the lining surface. After simulating the sound waves emitted by cracking in the lining of a straight wall arch tunnel under reverberate and noisy condition, the proposed method achieves high positioning accuracy. The numerical simulation of crack localization in Huilongshan tunnel and the field test of a straight wall arch tunnel verify that the proposed method can effectively monitor the crack length and expansion direction of the lining cracks.

Key words： crack monitoring sound source localization phase difference triangular pyramid array phase pick

Published: 25 October 2024 Online: 2024-11-05

CLC number:

U25

Fund:National Natural Science Foundation of China (41877219), the Academician Special Project of Natural Science Foundation of Chongqing (cstc2021yszx-jcyjX0002, CSTB2023YSZX-JCX0004) and the Chongqing Graduate Student Research Innovation Project (CYB22296).

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	Articles by authors
	WANG Yunxiao
	LIU Yuanxue
	YAO Weilai
	MU Rui
	GONG Hongwei

Cite this article:

WANG Yunxiao,LIU Yuanxue,YAO Weilai, et al. Acoustic Source Localization Method for Lining Cracking of Tunnel Based on Array Signal Processing in Space-frequency Domain[J]. Materials Reports, 2024, 38(20): 24030104-9.

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http://www.mater-rep.com/EN/10.11896/cldb.24030104 OR http://www.mater-rep.com/EN/Y2024/V38/I20/24030104

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