Institutt for marin teknikk: Nye registreringer
Viser treff 61-80 av 3417
-
Integrated Power and Energy System for Green Marine Ports; A Preliminary Design Approach
(Chapter, 2023)Electrification and alternative fuels with low carbon intensity are coming together to shape the future sustainable marine transport through integrated port energy systems. In this paper, a generic economic modeling approach ... -
Estimation of Long-Term Fatigue and Extreme Responses of Large-Diameter Monopiles for Offshore Wind Turbines
(Doctoral theses at NTNU;2024:26, Doctoral thesis, 2024)Offshore wind energy is a crucial part of the global effort to transition towards a decarbonized energy system. In this context, the foundations used to support offshore wind turbines (OWTs) play a significant role in ... -
Maritime fleet composition under future greenhouse gas emission restrictions and uncertain fuel prices
(Peer reviewed; Journal article, 2024)This paper studies the maritime fleet composition problem with uncertain future fuel and carbon prices under the restriction of complying with future greenhouse gas (GHG) emission restrictions. We propose a two-stage ... -
Integrated Energy Systems for Green Ports; A Cost Model and Case Study
(Chapter, 2023)In this paper, an integrated port energy system is described and modeled based on cost modeling and including practical constraints. The model uses simulated power data to operate an energy management system (EMS) with ... -
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 ... -
Second-order wave loads on floating wind parks with shared mooring
(Peer reviewed; Journal article, 2023)Wave loads on lattices of marine structures, such as wind parks with shared mooring systems, are considered. Modal excitation induced by second-order low-frequency wave loads is derived, leading to modal quadratic transfer ... -
Serviceability limit state assessment of semi-submersible floating wind turbines
(Peer reviewed; Journal article, 2023)The design of a floating wind turbine (FWT) should satisfy the serviceability limit state (SLS) requirement for an efficient and safe operation throughout the entire work life. The SLS requirements are introduced by the ... -
Challenges and Solutions for Autonomous Systems Safety–Findings from three International Workshops (IWASS)
(Chapter, 2023)Autonomous systems intend to be a stepping-stone towards safer and more efficient operations. Extensive mapping and monitoring of land, space, and the oceans, renewable energy harvesting and production, inspection of ... -
Hyperspectral Push-broom Systems: Operations, Software Development, and Spatial Resolution
(Doctoral theses at NTNU;2024:19, Doctoral thesis, 2024)Remote sensing satellites that provide hyperspectral imagery promise to be a valuable source of information and enable new applications. The _rst satellite from the NTNU Small-Satellite laboratory, the Hyperspectral Small ... -
Note on seabed shear stress beneath bichromatic and bidirectional waves for large bed roughness
(Peer reviewed; Journal article, 2023)The seabed shear stress beneath bichromatic and bidirectional waves is presented. The approach is analytical using the constant time-invariant eddy viscosity representation of Christoffersen and Jonsson (1985) for rough ... -
Wave inhomogeneities in a wave basin of constant water depth
(Journal article; Peer reviewed, 2023)Experimental testing of large marine structures in hydrodynamic laboratories requires an accurate reproduction of waves over a large area of the basin. However, with a uniform motion of the wavemaker, wave interactions ... -
Analyzing the Sensitivity of Wave Frequency Responses of Floating Vessels to Uncertain System Variables Utilizing Polynomial Chaos Expansion
(Peer reviewed; Journal article, 2023)From a mathematical viewpoint, the frequency domain analysis of vessel motion responses due to wave actions is based on integration of system dynamics idealized in terms of response amplitude operators for six degrees-of-freedom ... -
Mechanical and Thermal Simulations of 3D Printed Structures and the 3D Printing Process
(Doctoral theses at NTNU;2023:311, Doctoral thesis, 2023)Additive manufacturing (AM), often referred to as three-dimensional (3D) printing, has become one the fastest growing manufacturing technologies across a variety of engineering fields after transitioning from being a ... -
Ultimate and residual strength assessments of intact and collision damaged columns of the Bjørnafjorden floating bridge
(Chapter, 2023)The Norwegian Public Road Administration (NPRA) has initiated an ambitious project to replace the current ferry crossing solutions with floating bridges over the wide and deep Norwegian fjords. This will substantially ... -
Estimating waves via measured ship responses
(Peer reviewed; Journal article, 2023)Optimisation of energy efficiency and operational performance as well as assessment of safety levels and emissions of marine operations require detailed information about the acting wave system. It is possible—with an ... -
Performance of large diameter steel tubes from a floating offshore wind turbine under lateral impact loads
(Chapter, 2023)Floating offshore wind turbines (FOWTs) are expected to be increasingly installed in the world to harvest wind power in deep waters. Offshore wind turbines are often located near the coasts close to the traffic lanes and ... -
A Comparative Study of the Energy Efficiency of Hydrofoil Vessels and Slender Catamarans
(Chapter, 2023)The transition to zero-emission energy systems introduces new challenges in fast ferry design, particularly in relation to the increased weight and cost associated with stored and consumed energy. Hydrofoils may address ... -
Yaw misalignment in powertrain degradation modeling for wind farm control in curtailed conditions
(Peer reviewed; Journal article, 2024)A framework characterizing the degradation of wind turbines for use in multiple-input damage-aware farm control is suggested. The focus is on the fatigue damage of the powertrain (drivetrain + generator) system, but the ... -
An Efficient Method for Unsteady Hydrofoil Simulations, based on Non-Linear Dynamic Lifting Line theory
(Journal article; Peer reviewed, 2023)This paper presents a Non-linear Dynamic Lifting Line (NDLL)-based method for analysing hydrofoil vessels in waves. The method is validated, and its utility is demonstrated in a case study. The NDLL accounts for dynamic ... -
An Efficient Method for Design and Powering Prediction of Fast Slender Catamarans
(Journal article; Peer reviewed, 2023)This paper presents a parameterized and mathematically defined hull shape that can be tuned to represent modern passenger fast ferries. Additionally, a resistance calculation model for high-speed slender round-bilge ...