Journal of Offshore Mechanics and Arctic Engineering: Recent submissions
Now showing items 381-400 of 2185
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Nonlinear Wave Loads on Offshore Wind Turbines: Extreme Statistics and Fatigue
(The American Society of Mechanical Engineers (ASME), 2021)The development is presented of an analytical model for the prediction of the stochastic nonlinear wave loads on the support structure of bottom-mounted and floating offshore wind turbines. Explicit expressions are derived ... -
Effects of Onshore and Offshore Environmental Parameters on the Leading Edge Erosion of Wind Turbine Blades: A Comparative Study
(The American Society of Mechanical Engineers (ASME), 2021)The presence of rain-induced leading edge erosion of wind turbine blades (WTBs) necessitates the development of erosion models. One of the essential parameters for erosion modeling is the relative impact velocity between ... -
Numerical Simulations of Turbulent Flow Through an Orifice Plate in a Pipe
(The American Society of Mechanical Engineers (ASME), 2021)Orifice flowmeters are widely used in industries to measure the flowrate in pipelines. The flowrate inside the pipe can be calculated using the relationship between the flow velocity and the pressure drop across the orifice ... -
Modal Analysis of Wake Behind Stationary and Vibrating Cylinders
(The American Society of Mechanical Engineers (ASME), 2021)The dynamic mode decomposition (DMD) and proper orthogonal decomposition (POD) are used to analyze the coherent structures of turbulent flow around vibrating isolated and piggyback cylinders configurations subjected to a ... -
Simulating High-Mode Vortex-Induced Vibration of a Riser in Linearly Sheared Current Using an Empirical Time-Domain Model
(The American Society of Mechanical Engineers (ASME), 2021)As the development of offshore oil and gas continues to move into deeper waters, the risers connecting the seabed infrastructure to the offshore platform are getting longer. This means that vortex-induced vibration (VIV) ... -
Guidance for Material Selection Based on Static and Dynamic Mechanical Properties at Sub-Zero Temperatures
(The American Society of Mechanical Engineers (ASME), 2021)It is well known that material properties undergo significant changes with temperature. In order to meet extreme environmental requirements for ships and offshore structures operating in Arctic regions, the effect of ... -
An Enhanced Semi-Coupled Methodology for the Analysis and Design of Floating Production Systems
(The American Society of Mechanical Engineers (ASME), 2021)This work presents an enhanced hybrid methodology for the analysis and design of floating production systems (FPS). The semi-coupled (S-C) procedure exploits the advantages of coupled and uncoupled models, incorporated ... -
Numerical and Experimental Investigation on Nonlinear Cyclic Collapse Response of Ship Model in Regular Waves
(The American Society of Mechanical Engineers (ASME), 2020)Large ocean waves with large wave height may destroy the ship’s structure, whereas it is difficult to predict the nonlinear dynamic strength in the large waves. In this study, we used a nonlinear simulation based on boundary ... -
Stress Concentration Factors at Welded Connections Between Tubular Sections and a Transverse Plate
(The American Society of Mechanical Engineers (ASME), 2020)Welded connections between tubulars and transverse plates are used to build together part structures such as support of flare towers and wind turbines and deck structures on foundation structures. They are used in traditional ... -
Effects of Vertical Motions on Roll of Planing Hulls
(The American Society of Mechanical Engineers (ASME), 2021)Roll motion of a planing hull can be easily triggered at high speeds, causing a significant change in hydrodynamic pressure pattern, which can threaten the stability of the vessel. Modeling and investigating roll motion ... -
Analytical Solution for Froude–Krylov Force of Triangulated Geometry in Linear Waves
(The American Society of Mechanical Engineers (ASME), 2021)For wave exciting load on offshore structures, Froude–Kyrlov (FK) force is easier to evaluate than diffracting force. But current nonlinear FK models suffer low computational speed. Conventionally, FK force is calculated ... -
A Detailed Description of Flow-Deck Interaction in Consecutive Green Water Events
(The American Society of Mechanical Engineers (ASME), 2020)This paper gives a detailed description of the main hydrodynamic characteristics of different types of green water events occurring on a fixed structure in a series of experiments. High-speed video, at 250 fps, was used ... -
A Theoretical Model for Ship–Wave Impact Generated Sea Spray
(The American Society of Mechanical Engineers (ASME), 2020)Spray generated by ships traveling in cold oceans often leads to topside icing, which can be dangerous to vessels. Estimation of the spray flux is a first step in predicting icing accumulation. The amount of spray water, ... -
Dynamic Flexible Riser Ancillary Equipment—North Sea Asset Integrity Management Experience and Lessons Learned
(The American Society of Mechanical Engineers (ASME), 2020)Dynamic flexible risers are complex engineered systems, which provide a connection between topside (normally floating) facilities and subsea pipeline infrastructure on offshore oilfields. Such systems require the use of ... -
Soil–Structure–Wave Interaction of Gravity-Based Offshore Wind Turbines: An Analytical Model
(The American Society of Mechanical Engineers (ASME), 2020)The structural design of offshore wind turbines is based on the consideration of coupled dynamic phenomena. Wave loads cause the dynamic oscillation of the monopile, and the dynamic oscillation of the monopile affects the ... -
Structural Control of an Ultra-Large Semi-Submersible Floating Offshore Wind Turbine
(The American Society of Mechanical Engineers (ASME), 2020)A braceless semi-submersible floating platform is proposed for a Technical University of Denmark (DTU) 10-MW wind turbine at moderate water depths with reference to an existing National Renewable Energy Laboratory (NREL) ... -
Synergistic Flow-Induced Oscillation of Multiple Cylinders in Harvesting Marine Hydrokinetic Energy
(The American Society of Mechanical Engineers (ASME), 2020)Flow-induced oscillations/vibrations (FIO/V) of cylinders in tandem can be enhanced by proper in-flow spacing to increase hydrokinetic energy harnessing. In a farm of multiple cylinders in tandem, the effect of interference ... -
Performance of a Shore Fixed Oscillating Water Column Device for Different Bottom Slopes and Front Wall Drafts: A Study Based on Computational Fluid Dynamics and BIEM
(The American Society of Mechanical Engineers (ASME), 2020)Oscillating water column (OWC) wave energy converters are one of the most widely researched devices for ocean wave energy harvesting. This study investigates the hydrodynamic performance of a shore-fixed OWC device for ... -
Design and Dynamic Analysis of a Compact 10 MW Medium Speed Gearbox for Offshore Wind Turbines
(The American Society of Mechanical Engineers (ASME), 2020)This paper deals with the design of a compact gearbox for the DTU 10 MW reference offshore wind turbine. An innovative gearbox concept consisting of a fixed planetary stage and a differential compound epicyclic stage is ... -
Minimizing Numerical Ventilation in Computational Fluid Dynamics Simulations of High-Speed Planning Hulls
(The American Society of Mechanical Engineers (ASME), 2021)Numerical ventilation (NV) is a well-known problem that occurs when the volume of fluid method is used to model vessels with a bow that creates an acute entrance angle with the free surface, as is typical for both planing ...