Blar i Institutt for havromsoperasjoner og byggteknikk på forfatter "Æsøy, Vilmar"
-
Floating wind turbine mooring chain stress and fatigue analysis- Comparison between different solutions
Huse, Siren (Master thesis, 2022)I denne artikkelen har et nytt design for fortøyning av flytende vindturbiner blitt evaluert med hensyn til hvordan det påvirker topp kjettingen og sammenlignet med en lignende konstruksjon, et Fairlead som er en velprøvd ... -
Grønn kai 2023. Sluttrapport
Ekrem, Helene Ella Drevik; Degirmenci, Jan Fredrik; Hartveit, Ingrid Cecilia; Hellstrøm Olsen, Thomas; Johnsrud Vikan, Vetle; Lape Aasemyr, Anders; Opstad, Carina Sophie (Research report, 2023) -
Hydrogen as a Maritime Fuel – Can Experiences with LNG Be Transferred to Hydrogen Systems?
Nerheim, Ann Rigmor; Æsøy, Vilmar; Holmeset, Finn Tore (Journal article; Peer reviewed, 2021) -
Incorporating Approximate Dynamics Into Data-Driven Calibrator: A Representative Model for Ship Maneuvering Prediction
Wang, Tongtong; Li, Guoyuan; Hatledal, Lars Ivar; Skulstad, Robert; Æsøy, Vilmar; Zhang, Houxiang (Peer reviewed; Journal article, 2021)High-fidelity models capable of accurately predicting ship motion are critical for promoting innovation and efficiency in the maritime industry. However, creating an advanced model that comprehensively represents the system ... -
Integrated multi-domain system modelling and simulation for offshore crane operations
Chu, Yingguang; Æsøy, Vilmar; Ehlers, Sören; Zhang, Houxiang (Journal article; Peer reviewed, 2015)Advanced offshore machinery, such as an offshore crane, usually involves several energy domains. Modelling and simulation of multi-domain systems is challenging because of not only the complexity in modelling of the related ... -
Maritime Organizations Facing a New Era Servitization, technology implementation and professional work
Pareliussen, Bjarne (Doctoral theses at NTNU;2022:391, Doctoral thesis, 2022)Norsk sammendrag Denne avhandlingen undersøker organisatoriske endringer som en konsekvens av introduksjonen av digital teknologi og nye forretningsmodeller. Denne introduksjonen av teknologi kan sees i sammenheng med at ... -
Model Tests and Numerical Analysis of Wave Loads on Coastal Structures
Eliassen, Magnus Styrker (Master thesis, 2019)Denne forskningen er basert på å utforske effekten fra bølgekraft på kystnære strukturer. Et alternativ til dagens skiftende søkelys på renere og mer fornybar energi, er vindmøller plassert til sjøs. Mer spesifikt, er det ... -
Modeling and Simulation of the Accumulator During Active Heave Compensation Operations
Chu, Yingguang; Æsøy, Vilmar; Bunes, Øyvind; Pedersen, Eilif (Chapter; Peer reviewed, 2016)The paper presents the modeling and simulation of the thermodynamics of the accumulator system of the heave compensation system. Heave compensators in offshore and subsea applications are used to reduce the relative vertical ... -
Modeling, Simulation and Control of Motion Compensated Gangway in Offshore Operations
Yu, Feilong (2017;, Master thesis, 2017)This thesis is based on the idea to develop the integrated model of offshore gangway model including multi-body dynamics model and hydraulic system model with bond-graph method in 20-sim. And based on that model, active ... -
Multilayer Spooling of High Performance Synthetic Fibre Ropes. Experimental investigations of rope properties and stresses in winch drums
Skarbøvik, Reidar André (Doctoral theses at NTNU;2021:337, Doctoral thesis, 2021)Winch drums can appear as relatively simple mechanical components. However, accurate quantification of loads in multilayer winch-rope systems depends on a complex interaction between rope and drum. As vital parts of ... -
Numerical Analysis and Model Tests of Hydrodynamic Loads on Perforated Plates
Sihan, Gao (Master thesis, 2020)Perforated plate structures are widely applied in the maritime industry, while the hydrodynamic loads on them are hard to predict. This thesis aims to explore a methodology to utilize Computational Fluid Dynamics (CFD) in ... -
Numerical Simulations of Sloshing and the Thermodynamic Response Due to Mixing
Grotle, Erlend Liavåg; Æsøy, Vilmar (Journal article; Peer reviewed, 2017)In this paper, we apply computational fluid dynamics (CFD) to study the thermodynamic response enhanced by sloshing inside liquefied natural gas (LNG) fuel tanks. An existing numerical solver provided by OpenFOAM is used ... -
Online Fault Detection in Autonomous Ferries: Using fault-type in-dependent spectral anomaly detection
Ellefsen, Andre; Han, Peihua; Cheng, Xu; Holmeset, Finn Tore; Æsøy, Vilmar; Zhang, Houxiang (Peer reviewed; Journal article, 2020)Enthusiasm for ship autonomy is flourishing in the maritime industry. In this context, data-driven Prognostics and Health Management (PHM) systems have emerged as the optimal way to improve operational reliability and ... -
Parameter Identification of Ship Manoeuvring Model Under Disturbance Using Support Vector Machine Method
Wang, Tongtong; Li, Guoyuan; Wu, Baiheng; Æsøy, Vilmar; Zhang, Houxiang (Peer reviewed; Journal article, 2021).Demanding marine operations increase the complexity of manoeuvring. A highly accurate ship model promotes predicting ship motions and advancing control safety. It is crucial to identify the unknown hydrodynamic coefficients ... -
Physics-data Cooperative Modeling for Ship Motion Prediction
Wang, Tongtong (Doctoral theses at NTNU;2022:206, Doctoral thesis, 2022)Increasing development on autonomous vehicles and concern on ship navigation safety put forward a higher requirement for ship motion forecasting technology. The predictions of ship motion in the near future can give the ... -
Rapid Prototyping for Estimating Hydrodynamic Coefficients of Scaled Experiments on Subsea Structures during Lifting Operations
Tangen, Martin Håbet (Master thesis, 2019)Offshorenæringen må alltid strekke seg etter bedre teknologiske løsninger. Dynamiske krefter som påvirker maritime-operasjoner er delvis basert på erfaring på grunn av at estimeringen av komplekse geometrier kan være ... -
Remaining useful life predictions for turbofan engine degradation using semi-supervised deep architecture
Ellefsen, Andre; Bjørlykhaug, Emil; Æsøy, Vilmar; Ushakov, Sergey; Zhang, Houxiang (Journal article; Peer reviewed, 2018)In recent years, research has proposed several deep learning (DL) approaches to providing reliable remaining useful life (RUL) predictions in Prognostics and Health Management (PHM) applications. Although supervised DL ... -
Ship response and manoeuvrability - Main machinery characteristics, configuration modes, and its resulting effect on thrust response. Proposed dynamic ship merit factor / index.
Solevåg, Arne (Master thesis, 2016)This thesis have in general been divided into three parts: Discussion about the traditional approach for station keeping and manoeuvring capability (static approach with dynamic factor), use of more modern tools analysing ... -
Study of Compression Stages and Cylinder Arrangements for Reciprocating Air Compressor: A Modelling and Simulation Approach
Økland, Thomas Christian (Master thesis, 2023)En modell av en stempelkompressor er utviklet for å studere kompresjonstrinn og sylinderarrangement. Bond-graf metoden er valgt til å utvikle en to-sylindret stempelkompressor med fokus på det termodynamiske og mekaniske. Denne ... -
The Effect of Sloshing on a Tank Pressure Build-up Unit
Banne, Håvard Bolstad (Master thesis, 2017)This thesis work has aimed to identify how sloshing will affect a liquefied natural gas (LNG) fuel tank. The physical nature of LNG means it needs to be kept cooled and pressurized in order to remain in a liquid state. ...