Blar i Institutt for marin teknikk på tittel
Viser treff 1037-1056 av 3413
-
Dynamic responses of monopile wind turbines subjected to nonlinear wave loads
(Master thesis, 2020)I denne masteroppgaven blir eksperimentelle målinger fra en vindturbin med monopælfundament utsatt for regulære og irregulære bølger undersøkt. Monopælen har en diameter på 9 meter og bærer en 10 MW vindturbin. Ulike ... -
Dynamic risk analysis for operational decision support
(Chapter, 2017)Safe design of complex technical systems with a potential for major accidents is often supported by Quantitative Risk Analyses (QRA). The QRA has developed over several decades and the offshore oil and gas industry in ... -
Dynamic Risk Analysis for Operational Decision Support
(Journal article; Peer reviewed, 2017)Quantitative risk assessments for offshore oil and gas installations have been developed and used to support decision making about major hazards risk for more than 30 years. Initially, these studies were used to support ... -
Dynamic Risk Analysis of Operation of the Autonomous Underwater Vehicle (AUV)
(Chapter, 2020)The autonomous underwater vehicle (AUV) plays an essential role in scientific research and offshore exploration. Numerous risk issues exist during operation, however, which makes the AUV mission risky. The operating ... -
Dynamic risk assessment of marine systems
(Chapter, 2015)Challenges related to risk assessment of dynamic systems have become more numerous in the past decades due to rapid advances in technology. With these advances follows an increased use of automatic control systems which ... -
Dynamic Simulation and Control of an Active Roll Reduction System Using Free-Flooding Tanks With Vacuum Pumps
(Journal article; Peer reviewed, 2018)Ship roll motion is critical for offshore operations due to its lack of damping mechanism. This paper demonstrates a dynamic simulation scheme of an active roll reduction system using free-flooding tanks controlled by ... -
Dynamic Simulation and Control of an Active Roll Reduction System Using Free-Flooding Tanks With Vacuum Pumps
(Chapter; Peer reviewed, 2017)Ship roll motion is often the critical factor for offshore operations due to its lack of damping mechanism. This paper demonstrates a dynamic simulation scheme of an active roll reduction system using free-flooding tanks ... -
Dynamic Simulation of a Hydraulic Cylinder for Heave Compensation of Deepwater Drilling Risers
(Doctoral thesis at NTNU;2014:320, Doctoral thesis, 2014)This thesis presents global finite element simulations of a hydro-pneumatic riser tension cylinder used for tensioning and heave compensating of marine drilling risers. The global finite element models are made for use ... -
Dynamic simulation of deep water drilling risers with heave compensating system
(Doktoravhandlinger ved NTNU, 1503-8181; 2012:175, Doctoral thesis, 2012)This thesis discusses modelling aspects related to dynamic analysis of deep water drilling risers. These risers must have a heave compensator that maintains a near constant tension independent of platform motions. Traditional ... -
Dynamic Simulation of Module Installation on Deep Water
(Master thesis, 2015)The Aasta Hansteen field is a gas field outside the coast of Northern Norway. Production is planned to start in 2017. The gas field is situated at 1300m water depth the deepest on the Norwegian continental shelf. During ... -
Dynamic Ssimulation Of Dart Anchor Installation
(Master thesis, 2015)Over the few last decades, numerous mooring concepts have been developed, one of these being the dart/ torpedo anchor. A torpedo anchor is shaped like an arrow and is equipped with tail fins to provide good directional and ... -
Dynamic Stress Behaviour of Bonded Pipes and Umbilicals
(Master thesis, 2015)The main objective of this thesis is to study the characteristics of different types of flexible pipes and summarize the existing analytical methods, and to establish the models in order to simulate dynamic stress behavior ... -
Dynamic Stress due to End Effects in of Non-bonded Flexible Pipes
(Master thesis, 2015)In oil and gas industry, flexile riser is a crucial component for the production system which connected the seabed and the floating units. At the upper end of the flexible riser, bend stiffener is added to reduce the over ... -
Dynamic Thrust Allocation
(Master thesis, 2014)The purpose of this Thesis is to research the literature of thrust allocation, thruster modelling and maneuvering design, as well as to design and simulate various dynamic thrust allocation algorithms. Vessels with dynamic ... -
Dynamic wind farm layout optimization
(Master thesis, 2022)Recently, there has been an increase in interest in floating wind turbines that are located offshore. These turbines allow for the harvesting of the power of the wind far offshore, where wind speeds are often higher. Compared ... -
Dynamics of a Marine Propulsion System With a Diesel Engine and a Propeller Subject To Waves
(Chapter; Peer reviewed, 2015)When travelling in waves, the efficiency of the propulsion system is in most cases reduced, due to a variety of different effects. Traditionally, the performance of propeller and engine is analyzed separately. However, ... -
Dynamics of arrays of floating structures with shared mooring
(Master thesis, 2023)Flytende vindturbiner til havs kan være en nødvendighet for ˚a redusere utslippene ettersom mer av den produserte energien m˚a komme fra fornybare ressurser. Ogs˚a med høyere levestandard og industrialisering av samfunnet ... -
Dynamics of luffing motion of a flexible knuckle boom crane actuated by hydraulic cylinders
(Journal article; Peer reviewed, 2020)In this paper we present a modeling procedure for a flexible knuckle boom crane, which is actuated by hydraulic cylinders and is modeled as a planar multibody system. We propose a convenient framework where both rigid body ... -
Dynamics of Remotely Operated Underwater Vehicle Systems
(Doctoral theses at NTNU;2018:224, Doctoral thesis, 2018)The dynamics of typical remotely operated vehicle (ROV) systems are considered, and the subject is divided into three topics. Topic 1 considers the dynamics of single-body and multi-body ROVs, topic 2 considers the dynamics ... -
Dynamics of vortex evolution in a 2D baffled tank
(Journal article; Peer reviewed, 2016)A finite difference method with coordinate transformation and fictitious cell approach were used to analyze the vortex generation and shedding phenomenon for sloshing liquid in 2D tanks with baffles. The detailed description ...