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Long-gage fiber optic extensometers for dynamic structural monitoring

Gwendal Cumunel 
Abstract : The thesis falls under a new set of themes born from a new sensor's appearance : Continuously Attached Long-Gage fiber optic Extensometer (CA-LGE). The manuscript draws up a first panorama of CA-LGE capacities for dynamic structural monitoring. A complete analytical model of the sensors measurement is determined and applied to the case of Euler-Bernoulli beams. The various numerical and experimental studies then undertaken (for example signal processing with wavelet transform), make it possible to establish some characteristics of the CA-LGE. Some are specific to the sensor measurement base length : modes' filtering for structural control and damage detection from modal curvature. Others, like geometrical nonlinearities detection or ways for obtaining different modal forms, are related to the measurement type carried out, which is extensometric, and can thus be applied to other extensometers. This work's prospects are numerous, as well experimental as calculative.
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Submitted on : Friday, November 21, 2008 - 8:00:00 AM
Last modification on : Monday, October 19, 2020 - 11:03:59 AM
Long-term archiving on: : Thursday, September 30, 2010 - 8:45:01 PM


  • HAL Id : pastel-00004349, version 1



Gwendal Cumunel. Long-gage fiber optic extensometers for dynamic structural monitoring. Engineering Sciences [physics]. Ecole des Ponts ParisTech, 2008. English. ⟨pastel-00004349⟩



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