Browsing Institutt for marin teknikk by Title
Now showing items 2140-2159 of 3417
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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 ... -
A new method for optimal ship design in real sea states using the ship power profile
(Peer reviewed; Journal article, 2022)Typically, ships are designed for calm water and a constant design speed. However, a ship experiences different speeds and sea conditions over her lifetime. Following the significant correlations between environment and ... -
A new power prediction method using ship in-service data: a case study on a general cargo ship
(Journal article; Peer reviewed, 2023)To increase energy efficiency and reduce greenhouse gas (GHG) emissions in the shipping industry, an accurate prediction of the ship performance at sea is crucial. This paper proposes a new power prediction method based ... -
New Renewable Hydrothermal Liquefaction (HTL) Biofuel: A Combustion and Emissions Study in an Optical Engine
(Journal article; Peer reviewed, 2023)This study involves the investigation of municipal solid waste (MSW) based biofuel in order to demonstrate its utilization as a diesel blendstock in a compression ignition (CI) engine. The biofuel was produced from the ... -
New risk control mechanism for innovative deepwater artificial seabed system through online risk monitoring system
(Journal article, 2020)The current offshore field development concepts (dry tree or subsea tree) have limitations for petroleum production in ultra-deep water (more than 1500 m), where the challenges are characterized by the depth of water, ... -
Next Generation Subsea Inspection, Maintenance and Repair Operations
(Peer reviewed; Journal article, 2016)This paper presents the latest developments in the project Next Generation Subsea Inspection, Maintenance and Repair (IMR). Subsea IMR operations are frequently carried out in the offshore oil and gas business. Increased ... -
Non-angular MPC-based Thrust Allocation Algorithm for Marine Vessels - A Study of Optimal Thruster Commands
(Journal article, 2017)In this paper, a thrust allocation algorithm for marine vessels based on model predictive control (MPC) theory and a nonangular vector formulation is presented and studied. The main objective in this paper is to highlight ... -
Non-linear Analysis of Wind Load Subjected Novel Flare Tower Design for Sevan Marine
(Master thesis, 2012)Non-linear analysis of wind load subjected flare tower in Abaqus -
Non-Linear Clay Soil Model for Lateral Pipe-Soil Interaction
(Chapter; Peer reviewed, 2016)This paper describes implementation and application of nonlinear lateral soil models for pipeline lateral buckling analysis. Several lateral soil models have been developed in the past and the model developed by Verley is ... -
Non-linear control and digital twin modeling of the REMUS 100 AUV.
(Master thesis, 2020)Bruken av autonome undervannsfarkoster (AUV) i krevende, avsidesliggende miljøer involverer risikoen for kollisjoner og tap av fartøy. Koblet og ulineær dynamikk kombinert med underaktuering og usikker hydrodynamikk gjør ... -
Non-linear hydroelastic response of a monopile foundation in regular waves
(Peer reviewed; Journal article, 2020)This paper presents an original contribution to the coupled hydroelastic simulation of offshore wind turbines foundations. A non-linear coupled simulation tool has been developed to calculate the response of these systems. ... -
Non-linear Irregular Wave Impact on Monopile Structures
(Master thesis, 2016)This Master Thesis deals with non-linear wave impacts on monopile structures by introducing a potential flow solver named OceanWave3D (OCW3D) for simulating free surface waves and their kinematics under engineering ... -
NON-LINEAR SOIL MODELS FOR PIPELINE AND RISER ANALYSIS
(Master thesis, 2015)This thesis describes the development and application of non-linear soil models in pipeline and riser design. A non-linear soil model is typically employed when investigating a complex pipe-soil interaction problem. Two ... -
Non-linear time domain analysis of cross-flow vortex-induced vibrations
(Journal article; Peer reviewed, 2017)A previously proposed hydrodynamic load model for time domain simulation of cross-flow vortex-induced vibrations (VIV) is modified and combined with Morison's equation. The resulting model includes added mass, drag and a ... -
Non-Linear Time Domain Analysis of Deepwater Riser Vortex-Induced Vibrations
(Doctoral theses at NTNU;2022:178, Doctoral thesis, 2022)Fatigue analysis of marine risers due to vortex-induced vibrations (VIV) is normally based on semi-empirical frequency domain methods which only allow for linear structural models, excluding non-linear effects (e.g., tension ... -
Non-linear time domain analysis of vortex induced vibrations
(Master thesis, 2015)In this thesis a model for nonlinear analysis of vortex induced vibrations (VIV), applied to free spanning pipelines, is proposed. The developed model takes into account the soil-pipe interaction. Through case studies, ... -
A non-linear viscoelastic material model with progressive damage based on microstructural evolution and phase transition in polycrystalline ice for design against ice impact
(Peer reviewed; Journal article, 2023)This study presents a nonlinear viscoelastic material model incorporating a progressive damage framework with an iterative algorithm for glacial/freshwater polycrystalline ice subject to compressive impact load induced by ... -
Non-linear Wave Loads on Offshore Wind Support Structure
(Master thesis, 2014)Offshore wind development is constrained by its high cost. One potential way to meet this challenge is to reduce the uncertainty in wave modeling and hydrodynamic loads calculation for offshore wind support structures ... -
Non-Linear Wave-Body Interaction in Severe Waves
(Doctoral theses at NTNU;2019:173, Doctoral thesis, 2019)Offshore structures located in harsh environments may experience large wave loads and wave-induced responses. The present thesis documents a twodimensional numerical investigation of interactions between fixed or floating ... -
Nonlinear bending behavior of a multilayer copper conductor in a dynamic power cable
(Peer reviewed; Journal article, 2022)Reciprocating bending behavior is the main factor leading to the fatigue failure of dynamic power cables. However, in the research on the reciprocating bending behavior of dynamic cables, only the mechanical properties of ...