Blar i Institutt for marin teknikk på tittel
Viser treff 2359-2378 av 3431
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On acoustic equilibria
(Journal article, 2019)The present paper generalises mathematical theory of vibroequilibria onto the case of the acoustically-driven interface between ullage gas and liquid in a container -
On application of digital twin in ship operation and performance
(Master thesis, 2022)Shipping er en voksende industri og står for over 90% av verdenshandelen i dag. Stramme tidsskjemaer i havn og lange reiseavstander er typisk innen transportering, og derfor er effektivitet svært viktig for å opprettholde ... -
On characteristics of ice ridges and icebergs for design of ship hulls in polar regions based on environmental design contours
(Journal article; Peer reviewed, 2021) -
On Correlation and Underlying Physics
(Chapter, 2019) -
On Design and Analysis of a Drivetrain Test Rig for Wind Turbine Health Monitoring
(Chapter, 2019)The reliability of offshore wind turbines is a key factor when estimating maintanence costs, downtime due to component failure and overall efficiency during operational life. Offshore wind turbines have limited accessibility ... -
On Developing a Digital Twin for Fault Detection in Drivetrains of Offshore Wind Turbines
(Master thesis, 2018)This master thesis considers fault detection of drivetrains in offshore wind turbines through digital twin approach. A literature review regarding current operations concerning maintenance approaches in today s practices ... -
On Digital Twin Condition Monitoring Approach for Drivetrains in Marine Applications
(Chapter, 2019)A digital twin is a virtual representation of a system containing all information available on site. This paper presents condition monitoring of drivetrains in marine power transmission systems through digital twin approach. ... -
On Disaster Risk Reduction in Norwegian Oil and Gas Industry Through Life-Cycle Perspective
(Chapter, 2019)This paper presents the risk reduction in Norwegian oil & gas industry over the time (1975-2016) through a life cycle perspective analysis with the aim to identify the critical stage(s) both in terms of accident occurrence ... -
On Down-Scaled Modelling of Wind Turbine Drivetrains
(Peer reviewed; Journal article, 2020)Gearbox testing is an important and complex task that will become even more challenging as the wind industry moves towards ever-growing turbines. The burden of this task can be decreased by using reduced-scale models with ... -
On equivalent ice thickness and machine learning in ship ice transit simulations
(Doctoral theses at NTNU;2019:377, Doctoral thesis, 2019)This thesis presents a contribution to the research field of ship ice transit simulations used for estimating the ship resistance/speed profile in a complex ice field. Namely, two distinct methodological approaches within ... -
On Formal Methods for Design and Verification of Maritime Autonomous Surface Ships
(Journal article, 2022)Maritime Autonomous Surface Ships (MASS) are approaching a reality, introducing a new level of complexity and criticality to maritime control systems. In this paper we investigate how Formal Methods (FMs) can be used to ... -
On ice model validation and calibration strategies for damage as-sessment of structures subjected to impact actions
(Chapter, 2016)The number of numerical ice models in structural design is growing, and classical Lagrangian finite element formulation is still dominant for numerical simulations. In design of ships and offshore structures, the numerical ... -
On Initial Design and Modelling of a 10 MW Medium Speed Drivetrain for Offshore Wind Turbines
(Journal article; Peer reviewed, 2019)This paper presents the initial design and modelling of a medium speed drivetrain for the DTU 10 MW offshore wind turbine. Design basis and criteria of the drivetrain are described. Minimum weight and volume of the drivetrain ... -
On long-term fatigue damage and reliability analysis of gears under wind loads in offshore wind turbine drivetrains
(Journal article; Peer reviewed, 2014)In this paper, a long-term fatigue damage analysis method for gear tooth root bending in wind turbine’s drivetrains is presented. The proposed method is established based on the ISO gear design codes which are basically ... -
On model-based system approach for health monitoring of drivetrains in floating wind turbines
(Journal article; Peer reviewed, 2017)This paper deals with the health monitoring of a wind turbine drivetrain in a system perspective. A 5-MW reference drivetrain installed on a spar type floating wind turbine is selected. Degradation and damage in the main ... -
On multi-planar impact mechanics in ship collisions
(Peer reviewed; Journal article, 2019)This paper presents a new solution for ship impact dynamics in multi-planar space. A collision matrix is presented. It is derived on the basis of impact dynamics for rigid bodies. Effective mass factors are introduced ... -
On natural modes in moonpools and gaps in finite depth
(Journal article; Peer reviewed, 2018)In this paper an extension of the theoretical model of Molin (J. Fluid Mech., vol. 430, 2001, pp. 27–50) is proposed, where the assumptions of infinite depth and infinite horizontal extent of the support are released. The ... -
On prediction of torque in flexible pipe reeling operations using a Lagrangian-Eulerian FE framework
(Journal article; Peer reviewed, 2016)In this paper a new framework for FE simulation of reeling operations that utilizes a Lagrangian–Eulerian description of the beam kinematics is proposed. In contrast to the conventional Lagrangian approach, the material ... -
On Reduced Order Drivetrain Model Integrated With Wind Turbine and Wind Farm Simulation Tools
(Master thesis, 2022)Eksisterende vindturbin- og vindparksimuleringsverktøy tenderer til å ha forenklede modeller av drivverket integrert i modellen. Dette gjør simuleringene av drivverket raske, men fanger ikke opp den interne dynamikken i ...