Torfinn Ottesen
About
I am a PhD candidate with an ample experience within in the field of marine constructions: floating platforms and ships, mooring systems, pipeline systems including risers, cables and umbilicals. I am specialized in structural design, analysis, testing and installation.
My main area of interest is dynamic non-linear time domain analysis, estimation of statistical extreme values and fatigue analysis when accounting for non-linear effects such as friction.
My PhD research topic for the years 2021-2025 is described below.
An approach for safe and cost-effective installation of offshore wind power cables
The power cable is an essential part of any wind turbine since the produced energy cannot be delivered without the power cable. To assure power cable functionality, the mechanical integrity of the power cable system must be assured in all phases --- from cable manufacturing, through the offshore installation operation and during the operational life of the wind turbine plant.
Strang-Moran (2020, Offshore Renewable Energy Catapult) has reviewed causes of cable failures in the UK offshore wind industry. She reports that nearly half (46%) of cable failures are caused by installation errors. The rest is due to manufacturing issues (31%), inadequate cable design (15%) and mechanical damage after installation (8%).
In my project I will improve the simulation models for predicting cable load during installation. Also, safe limits for combined tension, torsion and bending loads are studied. This may help reduce the number of cable failures caused during installation.
Reference
*Strang-Moran, Charlotte. "Subsea cable management: Failure trending for offshore wind",
Wind Energy Science discussions (2020). Se: https://doi.org/10.5194/wes-2020-56
Publications
2017
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Ottesen, Torfinn.
(2017)
OMAE2017-62584 Experimental Investigation of Power Umbilical Damping.
The American Society of Mechanical Engineers (ASME)
Academic chapter/article/Conference paper
2016
-
Passano, Elisabeth;
Abtahi, Shahriar;
Ottesen, Torfinn.
(2016)
A procedure to include slip damping in a VIV analysis of an umbilical - OMAE2016-54816.
The American Society of Mechanical Engineers (ASME)
Academic chapter/article/Conference paper
Part of book/report
-
Ottesen, Torfinn.
(2017)
OMAE2017-62584 Experimental Investigation of Power Umbilical Damping.
The American Society of Mechanical Engineers (ASME)
Academic chapter/article/Conference paper
-
Passano, Elisabeth;
Abtahi, Shahriar;
Ottesen, Torfinn.
(2016)
A procedure to include slip damping in a VIV analysis of an umbilical - OMAE2016-54816.
The American Society of Mechanical Engineers (ASME)
Academic chapter/article/Conference paper
Knowledge Transfer
2017
-
Academic lectureOttesen, Torfinn. (2017) OMAE2017-62584 Experimental Investigation of Power Umbilical Damping. NTNU, SINTEF Ocean, ASME OMAE 2017 , Trondheim 2017-06-25 - 2017-06-30