DOI: 10.1002/2015GL067435
论文题名: Codetection of acoustic emissions during failure of heterogeneous media: New perspectives for natural hazard early warning
作者: Faillettaz J. ; Or D. ; Reiweger I.
刊名: Geophysical Research Letters
ISSN: 0094-9385
EISSN: 1944-9116
出版年: 2016
卷: 43, 期: 3 起始页码: 1075
结束页码: 1083
语种: 英语
英文关键词: acoustic emissions
; codetection
; early warning
; heterogeneous media
; wave attenuation
Scopus关键词: Acoustic emissions
; Elastic waves
; Failure (mechanical)
; Catastrophic failures
; Co-detection
; Early warning
; Heterogeneous media
; Load redistribution
; Mechanical failures
; Spatially explicit
; Wave attenuation
; Acoustic emission testing
; acoustic emission
; catastrophic event
; detection method
; early warning system
; elastic wave
; heterogeneity
; microcrack
; natural hazard
; numerical model
; wave attenuation
英文摘要: A simple method for real-time early warning of gravity-driven rupture that considers both the heterogeneity of natural media and characteristics of acoustic emissions attenuation is proposed. The method capitalizes on codetection of elastic waves emanating from microcracks by multiple and spatially separated sensors. Event codetection is considered as surrogate for large event size with more frequent codetected events marking imminence of catastrophic failure. Using a spatially explicit fiber bundle numerical model with spatially correlated mechanical strength and two load redistribution rules, we constructed a range of mechanical failure scenarios and associated failure events (mapped into acoustic emission) in space and time. Analysis considering hypothetical arrays of sensors and consideration of signal attenuation demonstrate the potential of the codetection principles even for insensitive sensors to provide early warning for imminent global failure. © 2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84969373525&doi=10.1002%2f2015GL067435&partnerID=40&md5=e0c6e57af406f9651ae456bf6adab06f
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10348
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: 3G, Department of Geography, University of Zürich, Zürich, Switzerland
Recommended Citation:
Faillettaz J.,Or D.,Reiweger I.. Codetection of acoustic emissions during failure of heterogeneous media: New perspectives for natural hazard early warning[J]. Geophysical Research Letters,2016-01-01,43(3).