Institutt for marin teknikk
Recent Submissions
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Added Resistance and Speed Loss of a Ship Found Using Onboard Monitoring Data
(Peer reviewed; Journal article, 2020)Prediction of the added resistance or corresponding speed loss in real sea conditions is essential to evaluate the performance of a ship. Assessment of the environmental impact on vessel performance is essential for route ... -
Inherent safety assessment: current state of the art and why is still not effectively adopted by industry
(Chapter, 2020)Inherent safety is a proactive approach to risk reduction. The industry should adopt it in the early stages of design as it is the most prominent approach to risk reduction, as described by experts. Researchers have worked ... -
Hydrodynamic Loads on Net Panels With Different Solidities
(Journal article; Peer reviewed, 2020)Drag forces on nets represent the largest contribution to hydrodynamic loads on traditional fish farms, and will have a large impact on total loads on new designs utilizing netting as containment method. Precise methods ... -
Modelling of a Shipboard Electric Power System for Hardware-in-the-Loop Testing
(Journal article, 2020)As the design complexity of modern maritime systems is increasing, the need for advanced and appropriate simulation technologies is higher than ever. Different subsystems such as shipboard power systems and maritime ... -
Predicting ship speeds in the Arctic using deep learning on historical AIS data
(Chapter, 2020)This study offers a perspective of applying fully connected neural networks (NN) to predict vessels’ speeds on a part of the Northern Sea Route and discusses its challenges. A fully connected neural network model was used ... -
Digital Twin Modelling of Ship Power and Propulsion Systems: Application of the Open Simulation Platform (OSP)
(Peer reviewed; Journal article, 2020)Today, modelling and simulation technologies are extensively used in the maritime industry. As a reaction to changing market demands and environmental challenges, maritime systems are becoming more complex and coupled. ... -
Structural resistance of ship and offshore structures exposed to the risk of brittle failure
(Doctoral theses at NTNU;2020:338, Doctoral thesis, 2020)The thesis aims to present the possibility of brittle failure in ship and offshore structures at low temperatures, and propose a material failure criterion for the prediction of ductile-brittle fracture transition in ... -
Glacial ice impacts: Part II: Damage assessment and ice-structure interactions in accidental limit states (ALS)
(Peer reviewed; Journal article, 2021)Floating glacial ice features of various sizes pose a substantial threat to the structural integrity of offshore structures in ice-prone regions. Relatively small ice feathers, e.g., bergy bits and growlers, are a major ... -
Decision-making for Dynamic Positioning Operations in the Offshore Industry – A Human Factors based Approach
(Doctoral theses at NTNU;2020:311, Doctoral thesis, 2020) -
Multi-step-ahead forecasting of wave conditions based on a physics-based machine learning (PBML) model for marine operations
(Peer reviewed; Journal article, 2020)Short-term wave forecasts are essential for the execution of marine operations. In this paper, an efficient and reliable physics-based machine learning (PBML) model is proposed to realize the multi-step-ahead forecasting ... -
An allision risk model for passing vessels and offshore oil and gas installations on the Norwegian Continental Shelf
(Peer reviewed; Journal article, 2020)This article presents a new risk model for estimating the probability of allision risk (the impact between a ship under way and a stationary installation) from passing vessels on the Norwegian Continental Shelf (NCS). ... -
Near-wall effect on flow around an elliptic cylinder translating above a plane wall
(Peer reviewed; Journal article, 2020)In this work, the flow over an elliptic cylinder near a moving wall is investigated for Reynolds numbers less than 150. Here, the ratio between the gap (i.e., the distance between the cylinder and the wall) and the length ... -
Resonant three-dimensional nonlinear sloshing in a square base basin. Part 5. Three-dimensional non-parametric tank forcing
(Peer reviewed; Journal article, 2020)Assuming an inviscid incompressible liquid (with irrotational flows) partly filling a square base tank, which performs a small-amplitude sway/surge/pitch/roll periodic motion whose frequency is close to the lowest natural ... -
Resonant three-dimensional nonlinear sloshing in a square base basin. Part 5. Three-dimensional non-parametric tank forcing
(Peer reviewed; Journal article, 2020)Assuming an inviscid incompressible liquid (with irrotational flows) partly filling a square base tank, which performs a small-amplitude sway/surge/pitch/roll periodic motion whose frequency is close to the lowest natural ... -
Validation of Numerical Models of the Offshore Wind Turbine From the Alpha Ventus Wind Farm Against Full-Scale Measurements Within OC5 Phase III
(Peer reviewed; Journal article, 2020)The main objective of the Offshore Code Comparison Collaboration Continuation, with Correlation (OC5) project is validation of aero-hydro-servo-elastic simulation tools for offshore wind turbines (OWTs) through comparison ... -
Effects of induction and wake steering control on power and drivetrain responses for 10 MW floating wind turbines in a wind farm
(Peer reviewed; Journal article, 2020)This paper aims to investigate the drivetrain load response caused by induction and wake steering control on two floating wind turbines (FWTs) in a wind farm. In this study, two DTU 10 MW turbines, supported on the nautilus ... -
Dynamic Analysis in Design and Operation of Large Floating Offshore Wind Turbine Drivetrains
(Doctoral theses at NTNU;2020:403, Doctoral thesis, 2020)This thesis presents a versatile rotor-bearing simulation model, including elements required to model rolling-element bearings as main bearings in large floating offshore wind turbines. Furthermore, the thesis presents new ... -
A hybrid kinematic controller for resilient obstacle avoidance of autonomous ships
(Peer reviewed; Journal article, 2020)Resilience is an important feature of autonomous systems. To be resilient, a control system must be stable, robust, and safe. This paper explores the use of hybrid feedback controllers to ensure robustness towards uncertainties ... -
Impact of cyber risk on the safety of the MilliAmpere2 Autonomous Passenger Ship
(Peer reviewed; Journal article, 2020)The digitalization of the maritime sector is continuously growing, leading to increased automation, such as, the development of autonomous vessels. The Autonomous Passenger Ship (APS) is a characteristic instantiation of ... -
A computationally efficient method for identification of steady state in time series data from ship monitoring
(Peer reviewed; Journal article, 2020)An increasing number of ships are being equipped with sensors and devices for monitoring of operational behavior, and the amount and access to operational data is gradually increasing. Due to various reasons described in ...
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