Journal of Offshore Mechanics and Arctic Engineering: Recent submissions
Now showing items 541-560 of 2185
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Numerical Modeling and Analysis of a Hybrid-Spar Floating Wind Turbine
(The American Society of Mechanical Engineers (ASME), 2019)In this paper, numerical modeling and analysis of a hybrid-spar floating wind turbine is presented. The hybrid-spar consists of steel at the upper part and precast prestressed concrete at the lower part. Such a configuration ... -
Power Optimization of Model-Scale Floating Wind Turbines Using Real-Time Hybrid Testing With Autonomous Actuation and Control1
(The American Society of Mechanical Engineers (ASME), 2019)Real-time hybrid testing of floating wind turbines is conducted at model scale. The semisubmersible, triangular platform, similar to the WindFloat platform, is built instead to support two, counter-rotating vertical-axis ... -
Effect of Axial Acceleration on Drivetrain Responses in a Spar-Type Floating Wind Turbine
(The American Society of Mechanical Engineers (ASME), 2019)Common industrial practice for designing floating wind turbines is to set an operational limit for the tower-top axial acceleration, normally in the range of 0.2–0.3 g, which is typically understood to be related to the ... -
Spatial Corrosion Wastage Modeling of Steel Plates Exposed to Marine Environments
(The American Society of Mechanical Engineers (ASME), 2019)The objective of the present study is to identify the most suitable corrosion degradation model, fitted with real corrosion depth measurement data sets and to reproduce the corroded steel plate surface as a function of ... -
Local and Global Responses of a Floating Bridge Under Ship–Girder Collisions
(The American Society of Mechanical Engineers (ASME), 2019)The Norwegian Public Roads Administration is running a project “Ferry Free Coastal Route E39” to replace existing ferry crossings by bridges across eight fjords in western Norway. Since most of the fjords are wide and deep, ... -
Numerical Study of a Moored Structure in Moving Broken Ice Driven by Current and Wave
(The American Society of Mechanical Engineers (ASME), 2019)This paper presents a numerical model intended to simulate the mooring force and the dynamic response of a moored structure in drifting ice. The mooring lines were explicitly modeled by using a generic cable model with a ... -
Development of Fatigue Design Standards for Marine Structures
(The American Society of Mechanical Engineers (ASME), 2019)Fatigue design standards for offshore structures became needed with development of offshore structures in harsh environments like the North Sea during the 1970s. The need for fatigue design of ship structures became increased ... -
Effects of Weather Routing on Maximum Vertical Bending Moment in a Ship Taking Account of Wave-Induced Vibrations
(The American Society of Mechanical Engineers (ASME), 2019)In this paper, the effect of weather routing and ship operations on the extreme vertical bending moment (VBM) in a 6000TEU class large container ship which is operated in North Atlantic Ocean is addressed. A direct time-domain ... -
Distributed Co-simulation of Maritime Systems and Operations
(The American Society of Mechanical Engineers (ASME), 2019)Here, we present the concept of an open virtual prototyping framework (VPF) for maritime systems and operations that enables its users to develop reusable component or subsystem models, and combine them in full-system ... -
A Time-Domain Method for Hydroelasticity of a Curved Floating Bridge in Inhomogeneous Waves
(The American Society of Mechanical Engineers (ASME), 2019)This paper presents a time-domain hydroelastic analysis method for bridges supported by floating pontoons in inhomogeneous wave conditions. The inhomogeneous wave effect is accounted for by adopting different wave spectra ... -
A Preliminary Investigation on the Risk Arising From the Use of High Pressure Fuel Gas Supply System in LNGC by Analyzing Risk Contributors Comparatively
(The American Society of Mechanical Engineers (ASME), 2019)This work is motivated by the need to identify the fire and explosion risk on liquefied natural gas carriers (LNGCs) developed by Daewoo Shipbuilding & Marine Engineering Co., Ltd., because the main engines are designed ... -
Fluid Structure Interaction Simulations of the NREL 5 MW Wind Turbine—Part I: Aerodynamics and Blockage Effect
(The American Society of Mechanical Engineers (ASME), 2019)Fluid structure interaction (FSI) simulations of the NREL 5 MW wind turbine are performed using a combination of two separate computational codes: abaqus for the finite element analysis (FEA) of turbine structures and ... -
Experimental Validation of the Adaptive Gaussian Process Regression Model Used for Prediction of Stress Intensity Factor as an Alternative to Finite Element Method
(The American Society of Mechanical Engineers (ASME), 2019)Currently, in the oil and gas industry, finite element method (FEM)-based commercial software (such as ANSYS and abaqus) is commonly employed for determining the stress intensity factor (SIF). In their earlier work, the ... -
Inertial Effects on the Performance of a Bottom-Hinged Oscillating Wave Surge Converter
(The American Society of Mechanical Engineers (ASME), 2019)This paper theoretically and experimentally investigates the inertial effects of the flap body on the performance of a bottom-hinged oscillating wave surge converter (BH-OWSC). A two-dimensional (2D) hydrodynamic theory ... -
Design and Optimization of a Ducted Marine Current Savonius Turbine for Gun-Barrel Passage, Fiji
(The American Society of Mechanical Engineers (ASME), 2019)Marine current energy is a reliable and clean source of energy. Many marine current turbines have been designed and developed over the years. Placement of an appropriately designed duct or shroud around the turbine ... -
Heat Loss of Insulated Pipes in Cross-Flow Winds
(The American Society of Mechanical Engineers (ASME), 2019)In recent years, there has been unprecedented interest shown in the Arctic region by the industry as it has become increasingly accessible for oil and gas exploration. This paper reviews existing literature on heat transfer ... -
Signal Processing for Operational Modal Analysis of a Jacket-Type Offshore Platform: Sea Test Study
(The American Society of Mechanical Engineers (ASME), 2019)Operational modal analysis (OMA) has been widely used for large structures. However, measured signals are inevitably contaminated with noise and may not be clean enough for identifying the modal parameters with proper ... -
Metocean Conditions in a Norwegian Fjord in Relation to the Floating Bridge Design
(The American Society of Mechanical Engineers (ASME), 2019)The present study investigates the environmental conditions in the Sulafjord in Norway, where a floating bridge is being considered for construction. Fifteen months of wave and wind measurement data in the fjord are compared ... -
Nonlinear Computational Welding Mechanics for Large Structures
(The American Society of Mechanical Engineers (ASME), 2019)In the construction of thin plate steel structures, including ships, welding is widely used to join parts. Welding inevitably causes deformation in thin plate structures, which may cause various problems. In the present ... -
Probabilistic Analysis of Extreme Riser Responses for a Weather-Vaning FPSO in Tropical Cyclones
(The American Society of Mechanical Engineers (ASME), 2019)The probability distributions of extreme responses of a flexible riser connected to a weather-vaning floating production storage and offloading (FPSO) are developed and investigated numerically for two tropical cyclones. ...