Browsing Institutt for marin teknikk by Journals "Journal of Offshore Mechanics and Arctic Engineering"
Now showing items 21-29 of 29
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On short-term fatigue analysis for wind turbine tower of two semi-submersible wind turbines including effect of startup and shutdown processes Research papers
(Peer reviewed; Journal article, 2021)Fatigue limit state design check for offshore wind turbines is based on SN curves and the Palmgren–Miner rule approach and focuses normally on stationary processes for which startup and/or shutdown operations induced ... -
On the significance of the higher-order stress in riser vortex-induced vibrations responses
(Journal article; Peer reviewed, 2019)Vortex-induced vibrations (VIV) can lead to fast accumulation of fatigue damage and increased drag loads for slender marine structures. VIV responses mainly occur at the vortex shedding frequency, while higher harmonics ... -
Real-Time Parameter Estimation of a Nonlinear Vessel Steering Model Using a Support Vector Machine
(Journal article; Peer reviewed, 2019)The least-square support vector machine (LS-SVM) is used to estimate the dynamic parameters of a nonlinear marine vessel steering model in real-time. First, maneuvering tests are carried out based on a scaled free-running ... -
Recent Advances in Integrated Response Analsysis of Floating Wind Turbines in a Reliability Perspective
(Peer reviewed; Journal article, 2020)Offshore wind provides an important source of renewable energy. While wind turbines fixed to the seabed in shallow water have already been industrialized, floating wind turbines are still at an early stage of development. ... -
Reliability Analysis of Crack Growth Occurrence for a Secondary Hull Component due to Vibration Excitation
(Peer reviewed; Journal article, 2024)Ship hull vibration is a significant contributor to fatigue crack growth and the major sources of vibrations are found to be the main engine vibration excitation, the wave-induced springing and whipping loads, and the ... -
Serviceability limit state assessment of semi-submersible floating wind turbines
(Peer reviewed; Journal article, 2023)The design of a floating wind turbine (FWT) should satisfy the serviceability limit state (SLS) requirement for an efficient and safe operation throughout the entire work life. The SLS requirements are introduced by the ... -
Simulating High-Mode Vortex-Induced Vibration of a Riser in Linearly Sheared Current Using an Empirical Time-Domain Model
(Peer reviewed; Journal article, 2021)As the development of offshore oil and gas continues to move into deeper waters, the risers connecting the seabed infrastructure to the offshore platform are getting longer. This means that vortex-induced vibration (VIV) ... -
Slug flow and waves induced motions in flexible riser
(Journal article; Peer reviewed, 2018)Flexible risers provide optimum solutions for deep water offshore fields. Reliable dynamic analysis of this kind of slender structure is crucial to ensure safety against long time fatigue failure. Beyond the effects from ... -
Validation of Numerical Models of the Offshore Wind Turbine From the Alpha Ventus Wind Farm Against Full-Scale Measurements Within OC5 Phase III
(Peer reviewed; Journal article, 2020)The main objective of the Offshore Code Comparison Collaboration Continuation, with Correlation (OC5) project is validation of aero-hydro-servo-elastic simulation tools for offshore wind turbines (OWTs) through comparison ...