First a method is presented to define a wavelet-based time-dependent spectrum for arbitrary non-stationary processes. Numerical results, assessed in terms of statistics depending on the spectral moments, prove satisfactory. Then the method is used to estimate the time-dependent spectrum of single-degree-of-freedom linear systems, in conjunction with an approximate analytical relation between the input and the output wavelet transform, already available in the literature. The validity of such relation is found to depend on the system and the input parameters. Interesting applications are feasible for linear systems with viscous dampers, subjected to seismic input

Wavelet-based estimation of fully non-stationary spectra and applications to seismic engineering / Failla, Giuseppe; Pappatico, M; Francomano, A; Santini, Adolfo. - (2009). (Intervento presentato al convegno XIX Congresso AIMETA Associazione Italiana di Meccanica Teorica e Applicata tenutosi a Ancona nel 14-17 Settembre 2009).

Wavelet-based estimation of fully non-stationary spectra and applications to seismic engineering

FAILLA, Giuseppe;SANTINI, Adolfo
2009-01-01

Abstract

First a method is presented to define a wavelet-based time-dependent spectrum for arbitrary non-stationary processes. Numerical results, assessed in terms of statistics depending on the spectral moments, prove satisfactory. Then the method is used to estimate the time-dependent spectrum of single-degree-of-freedom linear systems, in conjunction with an approximate analytical relation between the input and the output wavelet transform, already available in the literature. The validity of such relation is found to depend on the system and the input parameters. Interesting applications are feasible for linear systems with viscous dampers, subjected to seismic input
2009
978-88-96378-08-3
Wavelet analysis; Non-stationary process; Viscous dampers
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.12318/16770
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