Institutt for marin teknikk: Nye registreringer
Viser treff 101-120 av 3421
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A multi-period fleet retrofit and renewal problem for strategic green corridor planning and emission control in maritime shipping
(Master thesis, 2023)I denne masteroppgaven har vi utviklet en flerperiodisk modell for oppgradering og fornyelse av den maritime flåten. Målet med modellen er å gi verdifull innsikt i strategisk planlegging av grønne korridorer og generelle ... -
A multi-period fleet retrofit and renewal problem for strategic green corridor planning and emission control in maritme shipping
(Master thesis, 2023)I denne masteroppgaven har vi utviklet en flerperiodisk modell for oppgradering og fornyelse av den maritime flåten. Målet med modellen er å gi verdifull innsikt i strategisk planlegging av grønne korridorer og generelle ... -
Abnormal wave slamming impact of stiffened cylinders
(Chapter, 2023)The structural response of a stiffened cylinder due to slamming impact is studied using the ALE method in LS-Dyna. The numerical modelling approach is in the first place verified against experimental results from unstiffened ... -
Time-domain floater stress analysis for a floating wind turbine
(Peer reviewed; Journal article, 2023)There are increasing focuses on developing cost-effective floating wind turbines, for which efficient stress analysis methods are needed for floater structural design. Most of the today's studies focus on global analysis ... -
Streamlined semi-automatic data processing framework for ship performance analysis
(Peer reviewed; Journal article, 2023)The hydrodynamic performance of a sea-going ship can be analyzed using data from different sources, like onboard recorded in-service data, AIS data, and noon reports. Each of these sources is known to have its inherent ... -
A Decentralized Droop-Based Power Management System for Ship Power Systems Using Hybrid Dynamical Systems Framework
(Chapter, 2023)In maritime transport, inspired by the automobile sector, autonomy is gaining traction in parallel with decarbonization. One of the numerous challenges in realizing fully autonomous operation in shipping is to design a ... -
Buckling and Post-Buckling Behaviour of Extruded Aluminium Panels Subject to the Combined Effects of Welding and Pitting Corrosion
(Chapter, 2023)The present study investigates the effects of pitting corrosion and welding, both independently and combined, on the buckling and post-buckling behaviour of extruded aluminium panels. For this purpose, a finite element ... -
How Loads Interact? A Numerical Investigation of Aluminum Stiffened Panels Under Bi-Axial and Lateral Loads
(Chapter, 2023)Due to low weight, aluminum alloys are commonly used to build ferries, working boats and high-speed ships. The hull of such vessels can be designed as catamaran and trimaran for favorable hydrodynamical behavior and ... -
Risk-based supervisory control for autonomous ship navigation
(Peer reviewed; Journal article, 2023)This paper proposes a novel method to transform the results of qualitative risk analysis into a numeric optimal control problem for autonomous ship navigation. Today, making autonomous high-level decisions replacing a crew ... -
Extensive hydro-elastic floating bridge tests: Planning, design, implementation, and numerical comparison
(Peer reviewed; Journal article, 2023)Extensive hydrodynamic and hydro-elastic tests for a long floating bridge have been carried out in the ocean basin of SINTEF Ocean for the Bjørnafjord floating bridge project. The complexity of the floating bridge plus ... -
Retrieval of Ocean Wave Spectra From X-Band Marine Radar Images Using Inversion Schemes Based on Auto-Spectral Analysis
(Chapter, 2023)Estimation of ocean wave conditions is extremely crucial for the planning and execution of demanding marine operations. Further, the Response Based Decision-Making requires accurate wave inputs to derive the responses using ... -
Integration Test Procedures for a Collision Avoidance Decision Support System Using STPA
(Peer reviewed; Journal article, 2023)The transition from conventionally manned to autonomous ships is accompanied by the development of enhanced Decision Support Systems (DSS) for navigators. Such systems need to consider interactions among hardware, software, ... -
Four Degree-of-Freedom Hydrodynamic Maneuvering Model of a Small Azipod-Actuated Ship With Application to Onboard Decision Support Systems
(Peer reviewed; Journal article, 2023)The main contribution of this paper is a numerical ship motion model of NTNU’s research vessel Gunnerus, capturing the surge, sway, roll, and yaw dynamics when sailing in uniform and steady currents. The model utilizes a ... -
Gradient-Based Design Optimization of Fully-Flexible Floating Wind Turbines Using Modal Analysis
(Chapter, 2023)A variety of substructure concepts for floating offshore wind have been developed. Design optimization can be used to efficiently explore this design space and guide further work. Previous design optimization studies have ... -
Hydroelasticity analysis of a vessel-shaped fish cage under incident, diffraction and radiation wave fields
(Peer reviewed; Journal article, 2023)Vessel-shaped fish cages are promising large aquaculture structures developed in recent years, with an overall length of nearly 400 m. In this paper, a coupled hydroelasticity model of a vessel-shaped fish cage is used to ... -
How vortex dynamics affects the structural load in step cylinder flow
(Journal article; Peer reviewed, 2023)The vortex dynamics and the structural load in a step cylinder (consisting of a small, d, and a large, D, cylinder) flow are investigated numerically at Reynolds number (ReD) 150 for diameter ratios D/d=2.0,2.4 and 2.8. ... -
Coexistence of natural and forced vortex dislocations in step cylinder flow
(Journal article; Peer reviewed, 2023) -
A Survivability Analysis of Two Floating Offshore Wind Turbines in Intact and Damaged Conditions
(Master thesis, 2023)Vindenergi identifiseres som en del av løsningen for å tilby tilstrekkelig bærekraftig, trygg og sikker fornybar energi. Ettersom det er begrenset med passende områder på land eller nær kysten, er det et behov for flytende ... -
Use of response forecasting in decision making for weather sensitive offshore construction work
(Peer reviewed; Journal article, 2023)Response forecasting is an emerging technology for supporting decision-making during offshore construction work. The method aims to improve the reliability and efficiency of weather-sensitive operations. This article ... -
Enabling intelligent multi-modular concept for solar energy harvest by local control of connectors.
(Master thesis, 2023)Bruken av flytende multi-modulære strukturer har potensial til å bidra betydelig til å oppnå netto nullutslipp. Imidlertid er disse strukturene fortsatt i en tidlig utviklings fase og det kreves ytterligere forskning. Denne ...