Long-gage optical fiber extensometers for dynamic evaluation of structures - École des Ponts ParisTech Access content directly
Journal Articles Sensors and Actuators A: Physical Year : 2012

Long-gage optical fiber extensometers for dynamic evaluation of structures

S. Delepine-Lesoille
  • Function : Author
Pierre Argoul

Abstract

This paper deals with the study of the capacity of continuously attached long-gage fiber optic sensors for a new use: dynamic evaluation of structures. The optical system is first presented, followed by the development of the precise formulation of the measurement data obtained by this sensor when applied to the dynamic analysis of beams, especially under bending oscillations. This sensor allows us to find the curvature mode shapes. Numerical simulations are then performed to estimate the dynamic characteristics of the beam by means of the continuous wavelet transform, using the data obtained with this sensor. Finally, the fiber optic sensors are bonded on a real cantilever beam and experimental data are collected from the optical measurement system, in the case of aftershock free oscillations of the instrumented beam. A similar modal identification procedure as that proposed for numerical simulations is used and the results are compared to those obtained with accelerometers and long strain gauges. This type of sensor, allowing us to find the curvature mode shapes, will be a good candidate for damage detection.
Fichier principal
Vignette du fichier
LG_extensometers_dyn.pdf (942.2 Ko) Télécharger le fichier
Origin : Publisher files allowed on an open archive
Loading...

Dates and versions

hal-00829935 , version 1 (05-06-2013)

Identifiers

Cite

Gwendal Cumunel, S. Delepine-Lesoille, Pierre Argoul. Long-gage optical fiber extensometers for dynamic evaluation of structures. Sensors and Actuators A: Physical , 2012, 184, pp.1-15. ⟨10.1016/j.sna.2012.06.005⟩. ⟨hal-00829935⟩
171 View
336 Download

Altmetric

Share

Gmail Facebook X LinkedIn More