Blar i Institutt for marin teknikk på tittel
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Structural Design Considerations for an Ice Resistant Semi Submersible Drilling Rig
(Master thesis, 2014)Arctic areas contain large oil and gas fields demanding robust drilling and field development solutions. Semi submersible drilling and completion rigs are highly used for the current operations. Operating while surrounded ... -
Structural integrity of plates and panels subjected to accidental fires
(Master thesis, 2019)Brann på offshore konstruksjoner kan få alvorlig konsekvenser. Et eksempel på dette er Piper Alpha katastrofen i 1986. Branndesign er ofte basert forenklinger og antakelser, noe som gjør det vanskelig å reflektere ... -
Structural Load Analysis of a Wind Turbine under Pitch Actuator and Controller Faults
(Journal article; Peer reviewed, 2014)In this paper, we investigate the characteristics of a wind turbine under blade pitch angle and shaft speed sensor faults as well as pitch actuator faults. A land-based NREL 5MW variable speed pitch reg- ulated wind turbine ... -
Structural loads on a free-falling lifeboat
(Master thesis, 2017)Free-falling lifeboats are a method of escaping hazardous events in open sea. They rest at a skid until released and launched into the water. It is important that the use of free-falling lifeboats ensure a safe evacuation. ... -
Structural Modelling, Coupled Dynamics, and Design of Large Floating Wind Turbines
(Doctoral theses at NTNU;2022:246, Doctoral thesis, 2022)Floating wind turbines (FWTs) are expected to contribute significantly in the transition to a low-carbon economy. In addition to their increased competitiveness for water depths higher than 50-60 m, FWTs may also benefit ... -
Structural Preservation of the Statsraad Lehmkuhl - Feasibility and Associated Risks of Choosing Welding as the Primary Repair Method
(Master thesis, 2019)Preservering av et historisk seilskip kan betegnes som en prosess hvor man ønsker å respektere fortiden og sikre fremtiden. I tillegg til å være uvurderlige bidrag til maritim kulturarv, er seilskip som Statsraad Lehmkuhl ... -
Structural reliability analysis of a seafastening structure for sea transport of heavy objects
(Peer reviewed; Journal article, 2021)This paper addresses the safety of marine operations related to a seafastening system for large-object transport. The aim is to present a structural reliability approach to accommodate the uncertainties affecting design ... -
Structural reliability analysis of contact fatigue design of gears in wind turbine drivetrains
(Peer reviewed; Journal article, 2020)Advances in the design of large scale wind turbines have raised an interest for more optimized life cycle design of mechanical components (e.g. gears, bearings, shafts, etc.), with a better understanding of their performance ... -
Structural Reliability Analysis of Intact and Damaged Ships in A Collision Risk Analysis Perspective
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:17, Doctoral thesis, 2011)Risk-based design is growing in importance due to the need of obtaining measures of the safety to aid making decisions regarding the optimal balance between safety and economy. Design against Accidental Limit State (ALS) ... -
Structural reliability analysis of secondary hull detail
(Chapter, 2023)A reliability model for analyzing the possible occurrence of crack propagation of a secondary structural detail is developed. Vibration response due to engine excitation is formulated by a stochastic model based on analysis ... -
Structural Reliability Analysis of Wind Turbines: A Review
(Journal article; Peer reviewed, 2017)The paper presents a detailed review of the state-of-the-art research activities on structural reliability analysis of wind turbines between the 1990s and 2017. We describe the reliability methods including the first- and ... -
Structural reliability based position mooring
(Doktoravhandlinger ved NTNU, 1503-8181; 2008:62, Doctoral thesis, 2008)This thesis considers control of moored marine structures, referred to as position mooring. Moored marine structures can take on a number of different forms, and two applications are considered in this work, namely ... -
Structural resistance of polar ships and FPSO´s to ice loading
(Master thesis, 2012)Due to the substantial increase in oil and gas activities in Polar areas the demand for ice strengthen vessel has increased greatly. This increase in demand has highlighted the importance of designing ice strengthened ship ... -
Structural resistance of polar ships to ice loading: Discussion of the IACS Polar rules considering different structural and methodological aspects
(Master thesis, 2013)Generally, the design of ships and offshore structures intended for operation in ice infested waters has been based upon elastic methods of plasticity. However, through development of knowledge regarding the true behaviour ... -
Structural resistance of ship and offshore structures exposed to the risk of brittle failure
(Doctoral theses at NTNU;2020:338, Doctoral thesis, 2020)The thesis aims to present the possibility of brittle failure in ship and offshore structures at low temperatures, and propose a material failure criterion for the prediction of ductile-brittle fracture transition in ... -
Structural Response Analysis and Fatigue Damage Estimation of a Floating Bridge Subjected to Inhomogeneous Wave Loads
(Chapter, 2020)In this paper, a computational study of the structural responses of a floating bridge for crossing of the Bjørnafjord in Norway is presented. The study employs an idealized floating bridge model developed based on the phase ... -
Structural Response in Ship-Platform and Ship-Ice Collisions
(Doctoral thesis at NTNU;2016:14, Doctoral thesis, 2016)Collision events may have severe consequences, and it is important to design both ship and offshore structures so that they have sufficient resistance to a collision event. The main purpose of the work herein is to improve ... -
Structural Safety Assessment of Marine Operations From a Long-Term Perspective: A Case Study of Offshore Wind Turbine Blade Installation
(Chapter, 2019)A marine operation is a complex non-routine activity of limited duration carried out in offshore environment. Due to safety reasons, these operations are normally performed within specific sea state limits, which are derived ... -
Structural Strength of Work Boats and High Speed Crafts with Pre-fabricated, Floating Panels in Aluminium
(Master thesis, 2010)Aluminium is a material commonly used for smaller boats and high speed crafts due to its low weight. Traditionally the hull construction is performed in a similar manner as that of steel ships, with longitudinal stiffeners ... -
Structural strength of work boats and high speed crafts with pre-fabricated, floating panels in aluminum
(Master thesis, 2011)This thesis evaluates some relevant aspects related to structural integrity for work boats and high speed vessels with floating frames. This structural design is expected to significantly reduce the building cost, but it ...