Browsing Institutt for marin teknikk by Title
Now showing items 1117-1136 of 3421
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Efficient computation of cross-spectral densities in the stochastic modelling of waves and wave loads
(Journal article; Peer reviewed, 2017)A new method is presented for efficient calculation of auto- and cross-spectral densities in the stochastic modelling of ocean waves and wave loads. As part of the short-term response analyses, the method may contribute ... -
Efficient Determination of the Long-term Extreme Responses by the Modified Environmental Contour Method for a Combined Wind Turbine and Wave Energy Converter System
(Journal article; Peer reviewed, 2018)This paper deals with the performance of the modified environmental contour method (MECM) for determining long-term extreme load effect in a combined wind turbine and wave energy converter system. The wind turbine of the ... -
Efficient Installation of Subsea Equipment in Deep Water
(Master thesis, 2018)This thesis presents methods to preform subsea equipment installations, and highlights problems related to the conventional crane operation used in marine operations. The crane operation faces many challenges at water ... -
An Efficient Method for Design and Powering Prediction of Fast Slender Catamarans
(Journal article; Peer reviewed, 2023)This paper presents a parameterized and mathematically defined hull shape that can be tuned to represent modern passenger fast ferries. Additionally, a resistance calculation model for high-speed slender round-bilge ... -
An Efficient Method for Unsteady Hydrofoil Simulations, based on Non-Linear Dynamic Lifting Line theory
(Journal article; Peer reviewed, 2023)This paper presents a Non-linear Dynamic Lifting Line (NDLL)-based method for analysing hydrofoil vessels in waves. The method is validated, and its utility is demonstrated in a case study. The NDLL accounts for dynamic ... -
Efficient Modelling and Design Optimization of Large Floating Wind Turbines
(Doctoral theses at NTNU;2020:356, Doctoral thesis, 2020)Floating wind turbines (FWTs) are considered a promising solution for wind energy harvesting in deep water, but are currently too expensive to compete with other energy sources. Being a relatively new and immature technology ... -
Efficient Prediction of Dynamic Response for Flexible and Multi- Body Marine Structures
(Doktoravhandlinger ved NTNU, 1503-8181; 2008:262, Doctoral thesis, 2008) -
Efficient prediction of wind and wave induced long-term extreme load effects of floating suspension bridges using artificial neural networks and support vector machines
(Journal article; Peer reviewed, 2020)Long-term extreme load effects are one of the primary concerns in the design of civil and offshore structures. Such load effects can be evaluated using the accurate but computationally demanding full long-term method or ... -
Efficient Response Simulation Strategies for Jacket-based Offshore Wind Turbines - An integrated approach combining model reduction and nonlinear irregular wave theory
(Master thesis, 2014)The offshore wind industry has been growing exponentially over the last two decades, thereby establishing itself as one of the most promising alternative energy sources. Technological developments are required to reach ... -
Efficient rotor modelling for real-time hybrid testing
(Master thesis, 2017)Small-scale model tests in wave basins are important tools for validating numerical tools, evaluating system performance, and studying physical phenomena related to floating wind turbines. Hydrodynamic tests generally ... -
Eksperimentelle Studier av Fleksible Propeller på en Marin Thruster
(Master thesis, 2019)Marine propeller laget av fleksible materialer har muligheten forbedre ytelsen ved å tillate geometrien til å tilpasse seg selv til de hydrodynamiske last variasjonene. I samarbeid med forskningsprosjektet FleksProp har ... -
Elasticity, Wave Load Modeling and Upscaling of Spar Floating Wind Turbine
(Master thesis, 2021)Denne oppgaven undersøker elastisitet, bølgelast modellering og oppskalering av flytende vindturbiner med spar fundament. En litteraturstudie ble gjennomført for å få samle inn informasjon om emnene. En metode for å beregne ... -
Electric Cable Ferry: Feasibility study of an electric ferry concept
(Master thesis, 2014)AbstractThe thesis in hand has investigated the feasibility of a cable electric ferry concept. The concept investigated is based on that a short route ferry receives its propulsive power through a cable connected to the ... -
Electrification and Emission Reduction for Aquaculture Vessels; Case Study of a Wellboat
(Master thesis, 2021)Verden står ovenfor betydelige klimaendringer som en av vår tids største utfordringer. Klimaendringer har gitt et økt fokus på å redusere verdens klimagassutslipp og er også på toppen av FNs agenda. Skipsfartsindustrien ... -
Electromagnetic Oscillation Origin Location in Multiple-Inverter-Based Power Systems Using Components Impedance Frequency Responses
(Peer reviewed; Journal article, 2021)Existing impedance-based stability criterion (IBSC) for electromagnetic stability assessment of multiple-grid-connected-inverter (GCI)-based power systems suffers from several limitations. First, global stability feature ... -
Elementmetoden som et verktøy for estimering av stålvekt i konseptfasen
(Master thesis, 2019)Design prosessen for et cruiseskip starter med en konseptfase. På dette stadiet bestemmes en mengde forskjellige avgjørelser, inkludert hoveddimensjoner og et estimert budsjett. Stålvekt er en av de største utgiftspostene ... -
Eliminating the Uncertainties in Hydraulic and Ice Loads on Berm Breakwaters
(Chapter, 2019)A model for the computation of failure probabilities for partly reshaping mass-armored berm breakwaters in the Arctic is presented. The model consists of a reliable tool for the design of port structures in the rapidly ... -
Emergency Preparedness and Response in Aquaculture - Simulation of Vessel Response Time for Sheltered and Exposed Fish Farms
(Master thesis, 2017)This master s thesis investigates emergency preparedness and response in Norwegian aquaculture using discrete-event simulation. The aquaculture industry is growing in terms of production, size, and technology, with the ... -
Emergency preparedness in Arctic oil and gas exploration
(Master thesis, 2013)Due to an increasing interest in oil and gas exploration in the Barents Sea, it is important to identify all the challenges related to petroleum activity in that area. The objective of this thesis is to examine conditions ... -
Emission Control Areas: Effect on the Fleet Renewal Problem
(Master thesis, 2014)An important strategic planning problem in shipping is the fleet renewal problem. The purpose for liner shipping companies is to minimize the company's costs while finding the best way in which to develop a fleet over time ...