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Reliability-based Gear Contact Fatigue Analysis for Wind Turbines under Stochastic Dynamic Conditions
(Chapter, 2013)This paper describes a method to perform reliability-based gear contact fatigue analysis for wind turbines considering the long-term stochastic wind conditions. A simplified predictive subsurface pitting model for estimating ... -
Reliability-based safety factor for metallic strip flexible pipe subjected to external pressure
(Journal article; Peer reviewed, 2018)Reliability-based safety factors for metallic strip flexible pipes(MSFP) subjected to external pressure are calibrated in this paper. The partial safety factors of such pipes are obtained by introducing a target reliability ... -
Reliability-Centered Maintenance for a Merlin WR200 WROV
(Master thesis, 2018)IKM Subsea AS is an independent Remotely Operated Vehicle (ROV) company that owns and operates 20 Merlin WR200 ROV systems. In order to stay competitive on the ROV operation market IKM Subsea are seeking to reduce their ... -
Reliability-Centered Maintenance Methodology: Case Study and Improvements
(Master thesis, 2013)CONCLUSIONThe RCM is learned by applying to specific system and during the work several difficulties are discovered. As a solution to these problems there are suggested to use methods such as Concurrent Design and project ... -
Reliability-Centred Maintenance of Hydrogen-Fueled Coastal Fishing Vessel
(Master thesis, 2023)Denne masteroppgaven studerer RCM metoden til å konstruere ett vedlikeholdsprogram for en kystfiskesjark som bruker hydrogen som drivstoff. Sjarken vil være et null-utslippsfartøy som bruker brenselceller til fremdrift ved ... -
Remaining useful life predictions for turbofan engine degradation using semi-supervised deep architecture
(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 ... -
Remote Control and Automatic Path-following for C/S Enterprise I and ROV Neptunus.
(Master thesis, 2015)Remote control and monitoring of marine operations is in many cases desirable, due to distance, harsh environment, and dangers related to human life, and safety. Marine control systems in interaction with remote control ... -
Remote Operation of Marine Robotic Systems and Next-Generation Multi-Purpose Control Rooms
(Peer reviewed; Journal article, 2023)Since 2017, NTNU’s Applied Underwater Robotics Laboratory has been developing an infrastructure for remote marine/subsea operations in Trondheim Fjord. The infrastructure, named the OceanLab subsea node, allows remote ... -
Remote Sensing of the Tautra Ridge: An Overview of the World’s Shallowest Cold-Water Coral Reefs
(Peer reviewed; Journal article, 2022)On the Tautra Ridge – a 39-100 m deep morainic sill located in the middle of the Trondheimsfjord, Norway – some of the world’s shallowest known occurrences of the scleractinian cold-water coral (CWC) Desmophyllum pertusum ... -
Renewable CO2 recycling and synthetic fuel production in a marine environment
(Peer reviewed; Journal article, 2019)Humankind must cease CO2 emissions from fossil fuel burning if dangerous climate change is to be avoided. However, liquid carbon-based energy carriers are often without practical alternatives for vital mobility applications. ... -
Reproduction of Monopile Ringing Events in Reduced-Duration Model Tests
(Chapter; Peer reviewed, 2017)Monopile support structures for offshore wind turbines may experience ringing-type responses in steep wave conditions. In order to experimentally capture the statistical distribution of the hydrodynamic loads and structural ... -
Requirements and concepts for arctic evacuation
(Master thesis, 2011)Operation of manned oil and gas installations in arctic locations is complicated and presents new challenges. One of the challenges is to maintain the safety of the crew, by obtaining adequate lifeboat systems for crew ... -
Research on operating parameters of T-groove cylindrical gas film seal based on computational fluid dynamics
(Peer reviewed; Journal article, 2019)Cylindrical gas film sealing technology is a new type of dry gas sealing technology. Compared with the face gas film sealing technology, the cylindrical gas film seal presents a strong floating property, which can reduce ... -
Resilience by Latent Capabilities in Marine Systems
(Doctoral theses at NTNU;2018:394, Doctoral thesis, 2018)This thesis addresses the need for resilience, the ability of a system to recover from a disruption, in marine systems. It proposes to enhance resilience in the operational phase by taking advantage of latent capabilities, ... -
Resistance analysis of trimaran service vessel using CFD
(Master thesis, 2018)Service vessels within the aquaculture industry are normally designed as catamarans, however, the ships experience large resistance, where the contribution from wave resistance is dominant. In order to increase the ship ... -
Resistance due to open moonpools on offshore ships
(Master thesis, 2015)A moonpool is a vertical well in a vessels hull that is exposed to the sea. Many types of offshore vessels are equipped with such a moonpool, to facilitate maritime operations. The water column inside of the moonpool is ... -
Resonant sloshing in a square-base tank due to an angular-and-horizontal periodic forcing
(Journal article, 2016)Розробляється модальний метод для задачi про коливання рiдини у резервуарi квадратного перерiзу, який виконує перiодичнi горизон- тальнi та кутовi рухи малої амплiтуди. Аналiз показує, що домiнан- тна хвильова компонента ... -
Resonant steady-state sloshing in upright tanks performing a three-dimensional periodic motion
(Journal article, 2019)Analytical approaches to hydrostatic capillary (meniscus) problem in infinite horizontal channel and axisymmetric container are developed. For these geometric cases, finding the capillary menisci reduces to freeboundary ... -
Resonant Steady-State Sloshing in Upright Tanks: Effect of Three-Dimensional Excitations and Viscosity
(Chapter, 2018)Bearing in mind recent experimental and theoretical results showing that viscous damping can qualitatively affect resonant sloshing in clean tanks, the Narimanov-Moiseev multimodal sloshing theory for an upright circular ... -
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 ...