The placement and number of sensors is a crucial issue in experimental modal analysis. This is particularly true when large structures such as civil structures are under investigation, re-sulting in difficult and uncomfortable experimental set-up, large number of sensors, long ca-bles and expensive equipment for data acquisition. In this work we present a methodology for time–space superposition of data acquired during dynamical tests of large structures. The technique allows the correlation of measurements collected at different times and in different spatial configurations, requiring that only one single acquisition-point is kept spatially fixed. This makes possible to perform modal testing using undersized equipment and to include new test-data collected at different times and spatial distributions at a later stage. A case study, concerning experimental tests performed on an ancient building, is shown. The results have been validated experimentally and numerically using finite element analysis.

CORRELATION OF DATA WITH DIFFERENT SPACE-TIME DISTRIBUTION FOR MODAL ANALYSIS OF LARGE STRUCTURES / Garziera, Rinaldo; Luca, Collini; Elisabetta, Manconi. - (2015), pp. 1-7. ((Intervento presentato al convegno ICSV22, 22nd International Congress on Sound and Vibration tenutosi a Florence, Italy nel 12-16 July 2015.

CORRELATION OF DATA WITH DIFFERENT SPACE-TIME DISTRIBUTION FOR MODAL ANALYSIS OF LARGE STRUCTURES

GARZIERA, Rinaldo;COLLINI, Luca;MANCONI, Elisabetta
2015

Abstract

The placement and number of sensors is a crucial issue in experimental modal analysis. This is particularly true when large structures such as civil structures are under investigation, re-sulting in difficult and uncomfortable experimental set-up, large number of sensors, long ca-bles and expensive equipment for data acquisition. In this work we present a methodology for time–space superposition of data acquired during dynamical tests of large structures. The technique allows the correlation of measurements collected at different times and in different spatial configurations, requiring that only one single acquisition-point is kept spatially fixed. This makes possible to perform modal testing using undersized equipment and to include new test-data collected at different times and spatial distributions at a later stage. A case study, concerning experimental tests performed on an ancient building, is shown. The results have been validated experimentally and numerically using finite element analysis.
9788888942483
CORRELATION OF DATA WITH DIFFERENT SPACE-TIME DISTRIBUTION FOR MODAL ANALYSIS OF LARGE STRUCTURES / Garziera, Rinaldo; Luca, Collini; Elisabetta, Manconi. - (2015), pp. 1-7. ((Intervento presentato al convegno ICSV22, 22nd International Congress on Sound and Vibration tenutosi a Florence, Italy nel 12-16 July 2015.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11381/2797806
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