Browsing Institutt for marin teknikk by Journals "Applied Ocean Research"
Now showing items 1-20 of 59
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A combined wind and wave energy-converter concept in survivalmode: Numerical and experimental study in regular waves with afocus on water entry and exit
(Journal article; Peer reviewed, 2017)Water entry (including slamming) and exit phenomena as well as green water on deck were observed during survivability model tests of a combined wind and wave energy converter concept. Here, a nonlinear numerical ... -
A new combination of conditional environmental distributions
(Journal article, 2018)In this paper, a joint distribution of all relevant environmental parameters used in design of offshore structures including directional components is presented, along with a novel procedure for dependency modelling between ... -
A rational approach to seepage flow effects on bottom friction beneath random waves
(Journal article, 2014)The bottom friction beneath random waves is predicted taking into account the effect of seepage flow. This is achieved by using wave friction factors for rough turbulent, smooth turbulent and laminar flow valid for regular ... -
Active truncation of slender marine structures: Influence of the control system on Fidelity
(Journal article; Peer reviewed, 2018)Performing hydrodynamic model testing of ultra-deep water floating systems at a reasonable scale ischallenging, due to the limited space available in existing laboratories and to the large spatial extent ofthe slender ... -
Analysis of loads, motions and cavity dynamics during freefall wedges vertically entering the water surface
(Journal article; Peer reviewed, 2015)In this paper, theoretical models are developed and numerical methods are used to analyze the loads, motions and cavity dynamics for freefall wedges with different deadrise angles vertically entering the water surface at ... -
Application of a 2D harmonic polynomial cell (HPC) method to singular flows and lifting problems
(Journal article; Peer reviewed, 2015)Further developments and applications of the 2D harmonic polynomial cell (HPC) method proposed by Shao and Faltinsen [22] are presented. First, a local potential flow solution coupled with the HPC method and based on the ... -
Application of a lumping method for fatigue design of monopile-based wind turbines using fully coupled and simplified models
(Peer reviewed; Journal article, 2022)The study presents different methods for fatigue assessment of monopile-based offshore wind turbines. Their accuracy and computational time is compared to full long-term time domain results. The damage-equivalent lumping ... -
Application of data-driven models in the analysis of marine power systems
(Peer reviewed; Journal article, 2019)Computational thinking and coding are becoming an integral part of K-12 education, with female students being underrepresented in such subjects. The proliferation of technological tools and programming environments offers ... -
Assessing some statistical and physical modelling uncertainties of extreme responses for monopile-based offshore wind turbines, using metocean contours
(Peer reviewed; Journal article, 2024)This study examines the influence of probabilistic models for wave parameters in the joint environmental model and hydrodynamic/soil models on extreme mudline bending moments for monopile-based wind turbines at representative ... -
Characteristics of breaking irregular wave forces on a monopile
(Journal article; Peer reviewed, 2019)The substructures of offshore wind turbines are subjected to extreme breaking irregular wave forces. The present study is focused on investigating breaking irregular wave forces on a monopile using a computational fluid ... -
Comparative study of short-term extreme responses and fatigue damages of a floating wind turbine using two different blade models
(Journal article; Peer reviewed, 2020)In this work, two different blade structural models are used to estimate the blade deformations and the global structural responses of a 10MW floating offshore wind turbine (FOWT). One model is based on the Euler-Bernoulli ... -
A comparison between fully-unsteady and quasi-steady approach for the prediction of the propeller performance in waves: Prediction of the propeller performance in waves
(Peer reviewed; Journal article, 2020)Maritime transport is the most energy-effective mode to move large amounts of goods around the world. Hauling cargo via waterway produces an enormous quantity of greenhouse gas emissions. Vessel fuel efficiency directly ... -
Comparison of wave load effects on a TLP wind turbine by using computational fluid dynamics and potential flow theory approaches
(Journal article; Peer reviewed, 2015)Tension Leg Platform (TLP) is one of the concepts which shows promising results during initial studies to carry floating wind turbines. One of the concerns regarding tension leg platform wind turbines (TLPWTs) is the high ... -
Coupled vessel and moonpool responses in regular and irregular waves
(Peer reviewed; Journal article, 2020)Hydrodynamic coupling between the ship and moonpool responses is investigated. Dedicated experiments are carried out in the Ocean Basin at Sintef Ocean. Three different moonpool sizes are studied, where the moonpool length ... -
Dynamic consequence analysis of marine electric power plant in dynamic positioning
(Journal article; Peer reviewed, 2016)Diesel-electric power and propulsion systems with electric thrusters are the industry standard for vessels with dynamic positioning (DP) systems. Diesel engines are paired with generators in generator sets and are used to ... -
Dynamic response of a monopile wind turbine in waves: Experimental uncertainty analysis for validation of numerical tools
(Journal article; Peer reviewed, 2019)The responses of a monopile offshore wind turbine subjected to irregular wave loads are investigated numerically and experimentally, considering a range of sea states. An extensive experimental campaign was carried out on ... -
Effect of wave nonlinearity on fatigue damage and extreme responses of a semi-submersible floating wind turbine
(Journal article; Peer reviewed, 2019)Floating wind turbine has been the highlight in offshore wind industry lately. There has been great effort on developing highly sophisticated numerical model to better understand its hydrodynamic behaviour. A engineering-practical ... -
Effect of waves on cavitation and pressure pulses
(Journal article, 2016)In view of environmental concerns, there is increasing demand to optimize the ships for the actual operating condition rather than for calm water. Now, in order to apply this for propeller design, a first step would be to ... -
Effect of waves on cavitation and pressure pulses of a tanker with twin podded propulsion
(Journal article, 2017)There is increasing interest in optimizing ships for the actual operating condition rather than just for calm water. In order to optimize the propeller designs for operations in waves, it is essential to study how the ... -
Effects of wave directionality on extreme response for a long end-anchored floating bridge
(Journal article; Peer reviewed, 2019)Reliable design codes are of great importance when constructing new civil engineering concepts such as floating bridges. Previously only a scarce number of floating bridges have been built in rough wave conditions and ...