Browsing NTNU Open by Author "Bjerkås, Morten"
Now showing items 1-6 of 6
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Analysis of Ice-Induced Vibrations and Comparison with Full-Scale Experimental Data
Meese, Andreas Nordby (Master thesis, 2013)In the present work, a model which estimates the fatigue life for a cylindrical structure interacting with ice is developed. The model is based on the lighthouse of Norströmsgrund, and estimates the fatigue damage for one ... -
Combined distribution of ice thickness and speed based on local measurements at the Norströmsgrund lighthouse 2000-2003
Hornnes, Vegard; Høyland, Knut Vilhelm; Turner, Joshua Dennis; Gedikli, Ersegun Deniz; Bjerkås, Morten (Chapter, 2020)Abstract: Fatigue caused by ice-induced vibrations (IIV) is an important design consideration for offshore structures exposed to drifting sea ice. The occurrence of IIV is promoted by, but not limited to, certain combinations ... -
Flytebro med nytt forankringssystem
Bollmann, Magnus Røsseland (Master thesis, 2013)Hensikten med denne oppgaven er å evaluere et nytt flytebro konsept for Sognefjor- den. Flere grunnleggende design har vist seg å være hensiktsmessige og gjennom- førbare, og konseptet med forankret kunstig sjøbunn inkludert ... -
Ice Actions on Offshore Structures – With Applications of Continuous Wavelet Transforms on Ice Load Signals
Bjerkås, Morten (Doktoravhandlinger ved NTNU, 1503-8181; 2006:9, Doctoral thesis, 2006)Ice actions on offshore structures are one of the main concerns for engineering activities in cold areas with ice-infested waters. This thesis deals with three aspects of ice actions, namely design ice loads from level ... -
Ice-induced vibrations of the Norströmsgrund lighthouse
Nord, Torodd Skjerve; Samardzija, Ilija; Hendrikse, Hayo; Bjerkås, Morten; Høyland, Knut Vilhelm; Li, Hongtao (Journal article; Peer reviewed, 2018)The signature and occurrence of frequency lock-in (FLI) vibrations of full-scale offshore structures are not well understood. Although several structures have experienced FLI, limited amounts of time histories of the ... -
On the ice and wind conditions in the northern part of the Gulf of Bothnia leading ice-induced vibrations
Gedikli, Ersegun Deniz; Bjerkås, Morten; Høyland, Knut Vilhelm; Hornnes, Vegard; Turner, Joshua Dennis (Chapter, 2020)In ice infested regions drift ice can give serious damage to offshore structures and ships. The origin of the drifting ice is the winds and the currents. However, it is known that the Gulf of Bothnia does not have strong ...