Ice force identification on the Nordströmsgrund lighthouse

Nord, Torodd Skjerve; Øiseth, Ole; Lourens, E.

Ice force identification on the Nordströmsgrund lighthouse

Journal article (2016)

Authors

Torodd Skjerve Nord The University Centre in Svalbard

Ole Øiseth Norwegian University of Science and Technology (NTNU)

E. Lourens Offshore Engineering -

Research Group

Offshore Engineering () (TU Delft)

Ice-induced vibrations Force measurements Force identification Bottom-founded structure

To reference this document use:

http://resolver.tudelft.nl/uuid:97a517ca-f846-41d3-b6d9-28279cc3436d

More Info

expand_more

Published Date

01-06-2016

Language

English

Reuse Rights

Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

Faculty

Civil Engineering & Geosciences

Department

Hydraulic Engineering

Research Group

Offshore Engineering

Abstract

Ice forces on bottom-founded structures can be measured by load panels or identified from response measurements. This paper presents a comparison between the measured and identified dynamic ice forces acting on the Nordströmsgrund lighthouse. The dynamic ice forces are identified from the measured responses using a recently developed joint input-state estimation algorithm in conjunction with a reduced-order finite element model. A convincing agreement between the measured and identified forces was found. The response predictive ability of the algorithm is further used to estimate the response of the structure at unmeasured locations including at the ice-action point.