Browsing Institutt for marin teknikk by Title
Now showing items 2638-2657 of 3421
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Reducing uncertainty of Monte Carlo estimated fatigue damage in offshore wind turbines using FORM
(Chapter, 2016)Uncertainties related to fatigue damage estimation of non-linear systems are highly dependent on the tail behaviour and extreme values of the stress range distribution. By using a combination of the First Order Reliability ... -
Reduction of maritime GHG emissions and the potential role of E-fuels
(Peer reviewed; Journal article, 2021)Maritime transport accounts for around 3% of global anthropogenic Greenhouse gas (GHG) emissions (Well-to-Wake) and these emissions must be reduced with at least 50% in absolute values by 2050, to contribute to the ambitions ... -
Reduction of trawl impact loads on pipelines resting exposed on the seabed
(Master thesis, 2019)I dag finnes havbunnsinstallasjoner rundt omkring i Nordsjøen og Barentshavet med rørledninger som strekker seg totalt over 8800 kilometer på norsk sokkel. Rørledninger eksisterer rundt offshore-anlegget og er koblet til ... -
REGENERATION IN CRANE OPERATIONS
(Master thesis, 2017)In this thesis a marine power plant with a battery pack has been modeled using bond graph theory, using the bond graph simulation software 20-sim. The popularity of hybrid power systems are increasing in the marine sector, ... -
Reinforcement Learning for Autodocking of Surface Vessels
(Master thesis, 2019)Denne avhandlingen presenterer et studie av maskinlæring (ML) anvendt i maritim sammenheng. Mer spesifikt har forsterkende læring (FL), som et handlings-planleggende lag for veiledning i et dokningsscenario blitt inspisert. ... -
Relative Motion Calculator
(Master thesis, 2012)AbstractThe wind power business has in recent times changed its focus from land-based installations to offshore installations. This has presented challenges both technological and financial, mainly related to construction ... -
The relevance of recoil and free swimming in aquatic locomotion
(Peer reviewed; Journal article, 2021)The study of the free swimming of undulating bodies in an otherwise quiescent fluid has always encountered serious difficulties for several reasons. When considering the full system, given by the body and the unbounded ... -
Reliability Analysis for Physically Separated Redundant System
(Chapter, 2017)Redundancy has been a key concept to achieve high system reliability in technical systems, and the concept is central in modern technology regulations. One important aspect of successful redundancy is independence of the ... -
Reliability Analysis of Blowout Preventer Systems: A comparative study of electro-hydraulic vs. all-electric BOP technology
(Master thesis, 2014)A blowout preventer (BOP) is a large valve used to seal, control and monitor oil and gas wells. It serves as an important barrier against blowouts. Excessive downtime on the BOP is a problem for drilling companies worldwide, ... -
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 ... -
Reliability Analysis of Crack Growth Occurrence for a Secondary Structural Component due to Vibration Excitation
(Chapter, 2023)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 ... -
Reliability Analysis of Shore-to-Ship Fast Charging Systems
(Chapter, 2021)This paper presents a reliability assessment of Shore-to-Ship Sharging (S2SC) systems with focus on the two most common topologies of ac and dc charging. In the proposed reliability model, the Markov chain and reliability ... -
Reliability analysis of wake-induced collision of flexible risers
(Journal article; Peer reviewed, 2017)Collision between risers is an important design and operational concern, especially in deep water since the probability of collision tends to increase as the riser length increases. Riser collision is due to the joint ... -
Reliability Analysis of Wake-induced Riser Collision
(Doctoral theses at NTNU;2019:91, Doctoral thesis, 2019)Reliability-based design of a riser array requires accurate estimation of extremes of the stochastic relative motion process between pairs of risers in order to avoid collision. Hydrodynamic interference is considered to ... -
Reliability and Maintenance Analysis of Marine Hybrid Power and Propulsion Systems
(Master thesis, 2023)This thesis aims to provide a reliability and maintenance analysis of marine hybrid power systems and figure out the effect of vessel operation contexts and system redundancies. The Multi-phase Markov method is implemented ... -
Reliability assessment of a bridge structure subjected to chloride attack
(Journal article; Peer reviewed, 2018)Prediction of the service lifetime of concrete structures with respect to chloride ingress involves a number of parameters that are associated with large uncertainties. Hence, full-scale measurements are strongly in demand. ... -
Reliability Centered Maintenance (RCM) of the Autonomous Passenger Ferry in Trondheim
(Master thesis, 2018)This thesis make use of the RCM method to construct a maintenance program for an autonomous passenger ferry. The autonomous passenger ferry will work as a shuttle ferry in Trondheim, between Ravnkloa and Vestre Kanalkai. ... -
Reliability centered maintenance on the Norwegian continental shelf
(Master thesis, 2014)The main objective of this thesis is to unveil the challenges of RCM as an analysis method for assets on the Norwegian continental shelf. A mixed research method have been used, also known as a semi-quantitative method, ... -
Reliability-based Assessment of Deteriorating Ship-shaped Offshore Structures
(Doktoravhandlinger ved NTNU, 1503-8181; 2009.158, Doctoral thesis, 2009)Floating production, storage and offloading ships, referred to as FPSOs, are hybrid structures in the sense that these vessels are ships being operated as offshore facilities. Production ships or FPSOs constitute an efficient ... -
Reliability-based assessment of marine operations with emphasis on sea transport on barges
(Doctoral theses at NTNU;2020:383, Doctoral thesis, 2020)This thesis addresses the structural reliability assessment of marine operations related to the transport of large and heavy objects. The base case has been sea transportation by means of a towed barge with an emphasis on ...