二维非测速条件下声发射震源定位方法试验研究

doi:10.13722/j.cnki.jrme.2018.0575

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Abstract Aiming at the problem of source locating in rock engineering，the two-dimensional acoustic emission source locating algorithm without knowing the velocity profile by T. Kundu was modified. The shape of sensor cluster was extended from isosceles right triangle to arbitrary triangle for the generalization of the sensor layout. The modified locating algorithm was verified by a series of tests on a granite plate with three typical sensor layouts (isosceles right triangle，common right triangle and equilateral triangle). The results indicate that time delay of similar waveform between the adjacent sensors can be obtained accurately by means of cross-correlation technique. The located sources are close to the actual source. For each synthetic source，the mean square deviation of six repeated tests is very small. The better points ratios of 3 typical sensor layouts are 82.6%，84.0% and 71.0% respectively，which verified the applicability and accuracy of the source locating algorithm in the discontinuous materials like rock.

Key words： rock mechanics acoustic emission two-dimensional source locating granite plate cross-correlation locating accuracy

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	Articles by authors
	WU Shunchuan1
	2
	ZHANG Guang1
	ZHANG Shihuai1
	GUO Pei1
	CHU Chaoqun1

Cite this article:

WU Shunchuan1,2,ZHANG Guang1, et al. Experimental research on two-dimensional acoustic emission source locating without knowing the velocity profile#br#[J]. , 2019, 38(1): 28-39.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2018.0575 OR http://www.rockmech.org/EN/Y2019/V38/I1/28

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