Journal of Offshore Mechanics and Arctic Engineering: Recent submissions
Now showing items 401-420 of 2185
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REEF3D Wave Generation Interface for Commercial Computational Fluid Dynamics Codes
(The American Society of Mechanical Engineers (ASME), 2020)In recent years, computational fluid dynamics (CFD) developments have shown a trend to combine Reynolds-averaged Navier–Stokes (RANS) CFD simulation with other methods such as wave theories or velocity potential-based ... -
Forced Vibration Tests for In-Line Vortex-Induced Vibration to Assess Partially Strake-Covered Pipeline Spans
(The American Society of Mechanical Engineers (ASME), 2020)Helical strakes can suppress vortex-induced vibrations (VIVs) in pipelines spans and risers. Pure in-line (IL) VIV is more of a concern for pipelines than for risers. To make it possible to assess the effectiveness of ... -
Study on Failure Prediction Methodology of Flexible Pipes Under Large Torsion Considering Layer Interaction
(The American Society of Mechanical Engineers (ASME), 2020)Flexible pipes are distinctive multi-layer structures that are designed to resist different loads when they are utilized in severe deep-water environments. However, they lack a special structural layer to withstand torsion. ... -
Comparing Measured Responses of an Offshore Structure With Operational Modal Analysis-Assisted Classical Model Approach
(The American Society of Mechanical Engineers (ASME), 2020)Aiming to ensure the structural integrity of an offshore structure, wave-induced responses have been measured during normal operating conditions. Operational modal analysis is applied to the data obtained from continuously ... -
Ultimate Limit State Equations and Plasticity of Tubular Conical Transitions
(The American Society of Mechanical Engineers (ASME), 2020)Conical transitions have wide applications in wind turbine foundation as well as oil and gas jacket type of structures. The junctions where tubular and cone meet experience a sharp stress rise from shell edge effects. Like ... -
A Digital Twin for Lift Planning With Offshore Heave Compensated Cranes
(The American Society of Mechanical Engineers (ASME), 2020)This paper presents a state-of-the-art digital twin of a hydraulic actuated winch that is used for heave compensation in offshore applications. The digital twin is used as part of a larger simulation model that involves ... -
Robust Hierarchical Hovering Control of Autonomous Underwater Vehicles via Variable Ballast System
(The American Society of Mechanical Engineers (ASME), 2020)Hovering control of autonomous underwater vehicles (AUVs) via a variable ballast system (VBS) is challenging owing to the difficulty in precisely estimating related hydrodynamic coefficients and vertical disturbance. In ... -
On the Accuracy of an Analytical Solution to Model Wave-Induced Loads on an Underwater Vehicle in Real-Time
(The American Society of Mechanical Engineers (ASME), 2021)The accuracy of an existing analytical solution for modeling the linear, first-order wave-induced loads on a fully submerged body is investigated. The accuracy is assessed for the situation where the underlying theoretical ... -
Relation Between Atmospheric Circulation Patterns in the North Atlantic and the Sea States in the Iberian Peninsula
(The American Society of Mechanical Engineers (ASME), 2021)A statistical analysis of significant wave height (Hs) in a location offshore Portugal continental coast, Leixões, is performed. The spectral and parametric information of sea states at this point used in this analysis was ... -
Solutions for Downslope Pipeline Walking on a Seabed With a Peaky Trilinear Soil Resistance Model
(The American Society of Mechanical Engineers (ASME), 2020)Offshore pipelines used for transporting hydrocarbons are cyclically loaded by great variations of pressure and temperature. These variations can induce axial instability in such pipelines. This instability may cause the ... -
Proposals to Improve Load and Cavitation Computational Fluid Dynamics Analysis With Moving Reference Frame of a Conventional Propeller
(The American Society of Mechanical Engineers (ASME), 2020)A very interesting topic in naval architecture is propeller's choice. The engineering team must pay attention to several characteristics of the vessel to properly choose the most effective propeller for that specific ... -
Recommended Stress Formulae for Tubular Conical Transition Designs
(The American Society of Mechanical Engineers (ASME), 2020)For the design of tubular conical transitions, the axial, bending, and hoop stresses at the junctions are required. Among the offshore design standards, API RP-2A, ISO 19902, and NORSOK N-004, various equations exist for ... -
Wave Interaction With a Pair of Submerged Floating Tunnels in the Presence of An Array of Submerged Porous Breakwaters
(The American Society of Mechanical Engineers (ASME), 2021)In this article, a coupled model is proposed for wave interaction with a pair of submerged floating tunnels in the presence of an array of bottom-standing trapezoidal porous breakwaters. The theory of Sollitt and Cross is ... -
Hydrodynamic Analysis Techniques for Coupled Seakeeping–Sloshing in Zero Speed Vessels: A Review
(The American Society of Mechanical Engineers (ASME), 2020)With more recent discoveries of oil and gas reserves in the deep ocean locations like Guyana and Ghana, floating vessels such as floating production storage and offloading (FPSO) and floating liquified natural gas (FLNG) ... -
Nonlinear Evolution of a Steep, Focusing Wave Group in Deep Water Simulated With oceanwave3d
(The American Society of Mechanical Engineers (ASME), 2020)Steep, focusing waves can experience fast and local nonlinear evolution of the spectrum due to wave–wave interactions resulting in energy transfer to both higher and lower wavenumber components. The shape and kinematics ... -
On Bore Dynamics and Pressure: RANS, Green-Naghdi, and Saint-Venant Equations
(The American Society of Mechanical Engineers (ASME), 2020)Propagation and impact of two- and three-dimensional bores generated by breaking of a water reservoir is studies by use of three theoretical models. These include the Reynolds-averaged Navier–Stokes (RANS) equations, the ... -
Deep Learning Toward Autonomous Ship Navigation and Possible COLREGs Failures
(The American Society of Mechanical Engineers (ASME), 2020)A structured technology framework to address navigation considerations, including collision avoidance, of autonomous ships is the focus of this study. That consists of adequate maritime technologies to achieve the required ... -
Limit State Analyses in Design of Thin-Walled Marine Structures—Some Aspects on Length-Scales
(The American Society of Mechanical Engineers (ASME), 2020)This paper gives an overview of the factors that affect the strength and structural design of advanced thin-walled marine structures with reduced plate thickness or alternative topologies to those used today in the marine ... -
Design of Mooring Solutions and Array Systems for Point Absorbing Wave Energy Devices—Methodology and Application
(The American Society of Mechanical Engineers (ASME), 2020)Most of the ocean energy technologies are considered to be in a pre-commercial phase and need technical development. This study focuses on the design of mooring solutions and compares array systems of a specific floating ... -
Three-Dimensional Modeling of Wave-Induced Seabed Response Around a Semi-Buried Pipeline: A Small-Scale Case
(The American Society of Mechanical Engineers (ASME), 2020)In this paper, a three-dimensional integrated numerical model for a small-scale case of wave-induced oscillatory soil response around a semi-buried pipeline (PORO-WSSI-PIPE 3D) is proposed. In this model, we combine the ...