TY - GEN
T1 - Damage Detection Based on Strain Transmissibility for Beam Structure by Using Distributed Fiber Optics
AU - Cheng, Liangliang
AU - Busca, Giorgio
AU - Roberto, Paolo
AU - Vanali, Marcello
AU - Cigada, Alfredo
N1 - Publisher Copyright:
© The Society for Experimental Mechanics, Inc. 2017.
PY - 2017
Y1 - 2017
N2 - Structural damage identification is a coral and challenging research topic. Research mainly focuses on identification and detection of linear damage in structures by using modal parameters such as change of natural frequency, frequency response function, mode shape, etc. Transmissibility is conventionally defined as the spectra ratio of two measurement points, which has been utilized for damage identification as a powerful damage indicator. In this paper, strain transmissibility, defined as ratio of strain response spectra, is proposed as a new damage indicator. In order to achieve more precise sensing information, distributed fiber optics has been applied to damage detection on a beam structure, which adds new capability of sensing with its combination of high spatial density sensing and dynamic acquisition over a single optical fiber sensor. A numerical simulation has been conducted to investigate the feasibility of strain transmissibility for damage detection which has revealed a better performance compared to traditional transmissibility. The applicability of the proposed method has been confirmed by applying distributed fiber optics on a clamped-clamped beam. Both simulation and experiment validate the effectiveness of damage detection approach based on strain transmissibility by using distributed fiber optics.
AB - Structural damage identification is a coral and challenging research topic. Research mainly focuses on identification and detection of linear damage in structures by using modal parameters such as change of natural frequency, frequency response function, mode shape, etc. Transmissibility is conventionally defined as the spectra ratio of two measurement points, which has been utilized for damage identification as a powerful damage indicator. In this paper, strain transmissibility, defined as ratio of strain response spectra, is proposed as a new damage indicator. In order to achieve more precise sensing information, distributed fiber optics has been applied to damage detection on a beam structure, which adds new capability of sensing with its combination of high spatial density sensing and dynamic acquisition over a single optical fiber sensor. A numerical simulation has been conducted to investigate the feasibility of strain transmissibility for damage detection which has revealed a better performance compared to traditional transmissibility. The applicability of the proposed method has been confirmed by applying distributed fiber optics on a clamped-clamped beam. Both simulation and experiment validate the effectiveness of damage detection approach based on strain transmissibility by using distributed fiber optics.
KW - Damage detection
KW - Distributed fiber optics
KW - Dynamic measurement
KW - Optical frequency domain reflectometer
KW - Strain transmissibility
UR - http://www.scopus.com/inward/record.url?scp=85060348613&partnerID=8YFLogxK
U2 - 10.1007/978-3-319-54109-9_4
DO - 10.1007/978-3-319-54109-9_4
M3 - Conference contribution
AN - SCOPUS:85060348613
SN - 978-3-319-54108-2
T3 - Conference Proceedings of the Society for Experimental Mechanics Series
SP - 27
EP - 40
BT - Structural Health Monitoring and Damage Detection, Volume 7- Proceedings of the 35th IMAC, A Conference and Exposition on Structural Dynamics, 2017
A2 - Niezrecki, Christopher
PB - Springer
T2 - 35th IMAC, A Conference and Exposition on Structural Dynamics, 2017
Y2 - 30 January 2017 through 2 February 2017
ER -