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Strategy for Identification of Damping Ratio using Morlet Wave Damping Identification Method


Tomac, Ivan; Lozina Željan; Sedlar Damir
Strategy for Identification of Damping Ratio using Morlet Wave Damping Identification Method // Proceedings of ICoEV 2015 International Conference on Engineering Vibration / Boltežar, Miha ; Slavič, Janko ; Wiercigroch, Marian (ur.).
Ljubljana: National and University Library of Slovenia, 2015. str. 359-372 (predavanje, međunarodna recenzija, cjeloviti rad (in extenso), znanstveni)


Naslov
Strategy for Identification of Damping Ratio using Morlet Wave Damping Identification Method

Autori
Tomac, Ivan ; Lozina Željan ; Sedlar Damir

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of ICoEV 2015 International Conference on Engineering Vibration / Boltežar, Miha ; Slavič, Janko ; Wiercigroch, Marian - Ljubljana : National and University Library of Slovenia, 2015, 359-372

ISBN
978-961-6536-97-4

Skup
International Conference on Engineering Vibration 2015

Mjesto i datum
Ljubljana, Slovenija, 7-10.09.2015

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Modalna analiza; Koeficijent relativnog prigušenja; Identifikacija; Kontinuirana valna transformacija; Gaborova valna funkcija
(Modal Analysis; Damping ratio; Identification; Continious wavelet transform; Gabor wavelet)

Sažetak
A strategy for the identification of damping ratios in structures with a Morlet Wave Damping Identification method is proposed. Generally, this method is based on extracting damping ratios for a given natural frequency from only two wavelet coefficients. The considerable sensitivity of the identified values is noticed even for a small change of the parameters of the wavelet functions. To raise a certainty in the identified values we propose identification of damping ratio for the whole range of feasible wavelet functions parameters. Decision criteria are based on lowest fluctuation of the identified damping ratio. This strategy resulted in the raising the level of automation and reducing the operator interaction. Method is tested on the simulated responses and the experimentally measured responses. In both cases, the results of the damping ratios identification are compared with numerous independent traditional methods. Traditional identification methods applied in comparative analysis were available as in house code or commercial software.

Izvorni jezik
Engleski

Znanstvena područja
Brodogradnja, Strojarstvo, Zrakoplovstvo, raketna i svemirska tehnika



POVEZANOST RADA


Projekt / tema
023-0231744-1747 - INVERZNI POSTUPCI I NAPREDNI ALGORITMI U DINAMICI KONSTRUKCIJA I STROJEVA (Željan Lozina, )
023-0231744-3113 - Inteligentni i evolucijski algoritmi optimizacije materijala i konstrukcija (Damir Vučina, )

Ustanove
Fakultet elektrotehnike, strojarstva i brodogradnje, Split