Institutt for marin teknikk
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Continuous and discrete abstractions for planning, applied to ship docking
(Peer reviewed; Journal article, 2021)We propose a hierarchical control framework for the synthesis of correct-by-construction controllers for nonlinear control-affine systems with respect to reach-avoid-stay specifications. We first create a low-dimensional ... -
Glacial ice impacts: Part I: Wave-driven motion and small glacial ice feature impacts
(Peer reviewed; Journal article, 2021)Glacial ice features in the northern and central Barents Sea may threaten ships and offshore structures. Particularly, small glacial ice features, which are difficult to detect and manage by concurrent technologies, are ... -
How safe were vessels during research cruises in Arctic in 2007-2019? Linking the Ice Watch Data and the Polar Operational Limits Assessment Risk Index System
(Chapter, 2021)The present work analyzes cruise data from the Ice Watch database and applies the IMO's Polar Operational Limit Assessment Risk Indexing System (POLARIS) with ice observations. The results of this study showed that on ... -
Estimation of Extreme Roll Motion Using the First Order Reliability Method
(Chapter, 2021)Extreme value statistics can often be based on the assumption that exceedance events of a high threshold level are statistically independent and identically distributed (i.i.d. process), which further implies the Poisson ... -
Motion Feasibility Framework for Remotely Operated Vehicles Based on Dynamic Positioning Capability
(Peer reviewed; Journal article, 2021)Knowing whether a remotely operated vehicle (ROV) is able to operate at certain foreknown environmental conditions is a question relevant to different actors during the vehicle’s life cycle: during design stages, buying ... -
Revisiting statistical properties of surf parameter with characteristic wave parameters for single random waves including spectral bandwidth effects
(Peer reviewed; Journal article, 2021)Results from a comparative study of the joint distribution of surf parameter and wave period are provided. First, two transformed joint distributions of wave height and wave period are compared. One of the distributions ... -
Assessment of random wave energy dissipation due to submerged aquatic plants in shallow water using deep water wave conditions
(Peer reviewed; Journal article, 2021)This article addresses the random wave energy dissipation due to submerged aquatic plants in shallow water based on deep water wave conditions including estimation of wave damping. The motivation is to provide a simple ... -
Numerical and Experimental Studies of Maneuvering in Regular and Irregular Waves
(Doctoral theses at NTNU;2022:168, Doctoral thesis, 2022)The present work is a numerical and experimental study on maneuvering in regular and irregular waves of the Duisburg Test Case (DTC), a container ship with block coefficient CB = 0:661. Two test campaigns of free-running ... -
Modal analysis of a flexible membrane in waves
(Master thesis, 2022)Flytende solkraft er en lovende teknologi for å produsere fornybar energi. Det norske selskapet Ocean Sun sin patenterte teknologi for flytende sol består av en tynn, hydroelastisk, horisontal membran sammenkoblet med en ... -
Pressure-dependent plasticity models with convex yield loci for explicit ice crushing simulations
(Peer reviewed; Journal article, 2022)Despite the viscous behaviour of crushed ice, plasticity models have been widely used for numerical modelling of ‘design-ice’ in damage assessment applications for several reasons outlined herein. The Crushable Foam (CF) ... -
Comparing Combinations of Linear and Nonlinear Feedback Terms for Ship Motion Control
(Peer reviewed; Journal article, 2020)In this article, combinations of linear and nonlinear feedback terms are investigated for 3 degrees-of-freedom pose and velocity control of ships. Nonlinear control algorithms that are found in the literature often have ... -
Numerical modelling and dynamic response analysis of curved floating bridges with a small rise-span ratio
(Peer reviewed; Journal article, 2020)As a potential option for transportation applications in coastal areas, curved floating bridges with a same small specified rise to span ratio of 0.134, supported by multiple pontoons, are investigated in this paper. Two ... -
Making sense of speed effects on ice crushing pressure-area relationships in IACS ice-strengthening rules for ships
(Journal article; Peer reviewed, 2021)Arctic shipping fleet expansion is anticipated in the future. However, future refinements in the understanding of ice loads on larger ships are needed to achieve a better structural design with reduced steel weight. Published ... -
Optimal configuration problem identification of electrical power cable in tidal turbine farm via traveling salesman problem modeling approach
(Peer reviewed; Journal article, 2019)Electrical power cables in tidal turbine farms contribute a significant share to capital expenditure (CAPEX). As a result, the routing of electrical power cables connecting turbines to cable collector hubs must be designed ... -
Research on operating parameters of T-groove cylindrical gas film seal based on computational fluid dynamics
(Peer reviewed; Journal article, 2019)Cylindrical gas film sealing technology is a new type of dry gas sealing technology. Compared with the face gas film sealing technology, the cylindrical gas film seal presents a strong floating property, which can reduce ... -
Prediction of ships’ speed-power relationship at speed intervals below the design speed
(Peer reviewed; Journal article, 2021) -
Numerical study on buckling of aluminum extruded panels considering welding effects
(Peer reviewed; Journal article, 2022)Aluminum extruded panels are increasingly used in marine structures as lightweight solutions. Less welding is needed for such extrusions than traditional built-up panels of welding stiffener to plate sheets. However, the ... -
Instituttet
(Book, 2022) -
Artificial intelligence for ship speed management during navigation in the Arctic
(Peer reviewed; Journal article, 2021)Difficult ice conditions are one of the major threats to ships, shipboard crew, and cargoes carried in Arctic waters. Ship-speed choice is influenced by many factors including the navigational conditions (ice, weather, ... -
Bondline thickness effects on damage tolerance of adhesive joints subjected to localized impact damages: Application to leading edge of wind turbine blades
(Peer reviewed; Journal article, 2021)The leading edges of wind turbine blades are adhesively bonded composite sections that are susceptible to impact loads during offshore installation. The impact loads can cause localized damages at the leading edges that ...
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