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  4. Nonlinear model parameter identification for ice-induced vibrations
 
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Nonlinear model parameter identification for ice-induced vibrations

Citation Link: https://doi.org/10.15480/882.1860
Publikationstyp
Journal Article
Date Issued
2017-01-01
Sprache
English
Author(s)
Dostal, Leo  
Lourens, Eliz-Mari  
Metrikine, Andrei  
Institut
Mechanik und Meerestechnik M-13  
TORE-DOI
10.15480/882.1860
TORE-URI
http://tubdok.tub.tuhh.de/handle/11420/1863
Journal
Procedia engineering  
Volume
199
Start Page
583
End Page
588
Citation
Procedia Engineering (199): 583-588 (2017)
Contribution to Conference
X International Conference on Structural Dynamics, EURODYN 2017  
Publisher DOI
10.1016/j.proeng.2017.09.100
Scopus ID
2-s2.0-85029906648
Publisher
Elsevier
The problem of level ice interacting with compliant structures is addressed, where the ice loads can depend on the dynamical behavior of the structures. We are interested in a special type of ice-induced vibration, known as frequency lock-in, and characterized by having the dominant frequency of the ice forces near a natural frequency of the structure. It is shown that accurate estimates of the model parameters for the well-known Määttänen's model for ice-induced vibrations can be obtained from measurements of the structural vibrations and the ice velocity. Määttänen's model uses a state-dependent piecewise nonlinear function for the ice crushing strength, which leads to nonlinear negative damping in the equations of motion of the considered structure. The identification is achieved by means of an Unscented Kalman Filter using simulated noisy measurements of the structural behavior.
Subjects
parameter identification
ice-induced vibrations
unscented kaman filter
DDC Class
500: Naturwissenschaften
Lizenz
https://creativecommons.org/licenses/by-nc-nd/4.0/
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