Output-Only Estimation of Amplitude Dependent Friction-Induced Damping

Karsten Krautwald Vesterholm*, Tobias Friis, Evangelos Katsanos, Rune Brincker, Anders Brandt

*Kontaktforfatter for dette arbejde

Publikation: Kapitel i bog/rapport/konference-proceedingKonferencebidrag i proceedingsForskningpeer review

11 Downloads (Pure)

Abstrakt

Identification of modal parameters, when a structure is under operational conditions is termed Operational Modal Analysis (OMA). Current OMA techniques are based on the assumption of linear time-invariant systems, and thus have limited applicability when applied to structures known to violate these assumptions. The present study investigates how the Random Decrement (RD) technique can improve robustness of OMA methods when friction-induced nonlinear damping is present in a system. This is done by estimating the amplitude dependent damping. A friction mechanism is introduced in a model of a structure, and by applying the RD technique at different amplitudes of simulated responses, RD signatures are produced, that represent the system vibrating with these amplitude levels. This allows the modal parameters to be estimated based on RD signatures computed with each amplitude level, using time domain parameter estimation methods, and the amplitude dependency of the damping is identified.
OriginalsprogEngelsk
TitelDynamics of Civil Structures
RedaktørerShamim Pakzad
Vol/bind2
ForlagSpringer
Publikationsdato2020
Sider17-25
ISBN (Trykt)978-3-030-12114-3
ISBN (Elektronisk)978-3-030-12115-0
DOI
StatusUdgivet - 2020
BegivenhedInternational Modal Analysis Conference - Orlando, USA
Varighed: 28. jan. 201931. jan. 2019
Konferencens nummer: 37
https://sem.org/imac

Konference

KonferenceInternational Modal Analysis Conference
Nummer37
LandUSA
ByOrlando
Periode28/01/201931/01/2019
Internetadresse
NavnConference Proceedings of the Society for Experimental Mechanics Series
ISSN2191-5644

Fingeraftryk Dyk ned i forskningsemnerne om 'Output-Only Estimation of Amplitude Dependent Friction-Induced Damping'. Sammen danner de et unikt fingeraftryk.

Citationsformater