Blar i Institutt for marin teknikk på tittel
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Online Path Planning for Surface Vehicles Exposed to Unknown Ocean Currents Using Pseudospectral Optimal Control
(Journal article; Peer reviewed, 2016)This paper investigates the feasibility of using pseudospectral (PS) optimal control in real-time path planning for marine surface vehicles in environments where both obstacles and unknown disturbances are present. In ... -
Online reconstruction of drifting underwater ice topography: The 2D case
(Journal article; Peer reviewed, 2015)An online estimation design for a drifting two dimensional ice topography is presented. Under the assumption that the topography can be accurately represented by a truncated Fourier series, and given a moving window of ... -
Online Riks Management for MilliAmpere 2
(Master thesis, 2022)Denne rapporten gir et grunnleggende rammeverk for Dynamisk Risiko Styring (ORM) for den autonome passasjerfergen, milliAmpere 2. Den autonome passasjerfergen vil operere som en ferge i Trondheim, mellom Ravnkloa og Vestre ... -
Online risk modeling for autonomous ships with experimental results
(Master thesis, 2019)Den maritime industrien opplever i dag betydelige fremskritt i sammenheng med autonomi, noe som gjør det mulig å forbedre automatiseringsnivået rundt navigasjon og situasjonsforståelse. Autonome fartøy er et relativt nytt ... -
Online Shape Estimation of Icebergs at Sea
(Master thesis, 2015)Offshore operations in the Arctic present several challenges, such as the threat of icebergs colliding with offshore structures.This thesis will investigate methods of estimating the shape and size of iceberg keel geometries. ... -
Online wave estimation using vessel motion measurements
(Journal article; Peer reviewed, 2018)In this paper, a computationally efficient online sea state estimation algorithm is proposed for estimation of the onsite sea state. The algorithm finds the wave spectrum estimate from motion measurements in heave, roll ... -
Onset and Progression of Vortical Structures for a Surface Combatant at Drift Angles 0, 10 and 20 Degrees
(Master thesis, 2013)The onset on progression of vortical structures of the ship model DTMB 5512 (geosym of DTMB5415) has been examined for drift angles -1, 10 and 20 degrees, by means of tomographic particle image velocimetry. The drift angle ... -
Onsite Blade Exchange on a Tension-Leg Platform Floating Wind Turbine using a Self-Climbing Crane
(Master thesis, 2023)Floating offshore wind turbines offer a means to access wind resources in waters that are too deep for bottom-fixed offshore wind turbines. To operate a floating wind farm, it must be possible to perform maintenance on the ... -
Open Hatch Carriers - Future Vessel Designs & Operations
(Journal article; Peer reviewed, 2022)The development of Open hatch carriers (OHC) dates back to the early 1960s linked to transport of newsprint from the paper mills along the coast of British Columbia (Canada) to the news-printers in San Francisco and Los ... -
An Open-Source Python-Based Boundary-Element Method Code for the Three-Dimensional, Zero-Froude, Infinite-Depth, Water-Wave Diffraction-Radiation Problem
(Journal article; Peer reviewed, 2021)In this paper, a new open-source implementation of the lower-order, 3-D Boundary Element Method (BEM) of solution to the deep-water, zero Froude-number wave-body interaction problem is described. A validation case for ... -
Operability Analysis of Monopile Lowering Operation Using Different Numerical Approaches
(Journal article, 2016)Offshore installation operations require careful planning in the design phase to minimize associated risks. This study addresses numerical modeling and time-domain simulations of the lowering operation during installation ... -
Operability robustness index as seakeeping performance criterion for offshore vessels
(Peer reviewed; Journal article, 2020)The offshore industry operates increasingly large installations in exposed areas requiring high reliability and availability. Downtime of complex offshore systems leads to significant financial losses. Towards year-round ... -
Operation platform design for modular adaptable ships: Towards the configure-to-order strategy
(Journal article; Peer reviewed, 2018)Modular adaptable ships have received growing attention in recent decades as a promising approach to handling uncertainty in future operating contexts. A modular adaptable ship can be used for multiple purposes by changing ... -
Operation-based Reliability Assessment of Shore-to-Ship Charging Systems Including On-Shore Batteries
(Journal article; Peer reviewed, 2023)In this paper, an operation-based reliability assessment framework is proposed for Shore-to-Ship Charging (S2SC) systems including On-Shore Batteries (OSB). The OSB is considered to support the grid under fast charging ... -
Operational Barrier Elements in Critical Drilling Operations: Understanding Failure Mechanisms in the Primary Well Barrier
(Master thesis, 2014)This thesis concerns the use of human reliability analysis in offshore quantitative risk analysis (QRA). A QRA is a risk analysis which produces numerical values for probabilities of, and consequences from, undesired events. ... -
Operational criteria for transporting wind turbine with WindFlip
(Master thesis, 2010)This master thesis explores the transportation part of the installation concept WindFlip, where fully assembled floating wind turbines are transported lying with a 5° slope on the barge WindFlip. The transportation phase ... -
Operational limits for aquaculture operations from a risk and safety perspective
(Peer reviewed; Journal article, 2020)Current decision making regarding whether to abort a high-risk aquaculture operation in a Norwegian fish farm is mainly experience-driven. The on-site personnel decides whether to start/delay/abort operations primarily ... -
Operational limits for floating-collar fish farms in waves and current, without and with well-boat presence
(Doctoral theses at NTNU;2018:367, Doctoral thesis, 2018)Dynamic response of a floating circular collar-type fish farm, without and with well-boat presence, in current, regular and irregular waves is analyzed. A modern design well boat and a realistic fish farm (with single cage) ... -
Operational profiles of ships in Norwegian waters: An activity-based approach to assess the benefits of hybrid and electric propulsion
(Journal article, 2018)Various regulations are imposed on shipping to increase energy efficiency and reduce environmental impacts. Alternative fuels and power systems are among the solutions for compliance with these regulations. The power system ... -
Operational Risk in the Norwegian Barents Sea
(Master thesis, 2013)With the estimated increase in demand for energy in the World by one-third within the next 25 years, the findings and estimates in the Arctic are of great importance. Equipment, procedures, training, facilities, logistics, ...