Journal of Offshore Mechanics and Arctic Engineering: Recent submissions
Now showing items 661-680 of 2185
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Unsteady RANS Simulations of Wells Turbine Under Transient Flow Conditions
(The American Society of Mechanical Engineers (ASME), 2018)Unsteady RANS Simulations of Wells Turbine Under Transient Flow Conditions;This paper presents our recent numerical simulations of a high-solidity Wells turbine under both steady and unsteady conditions by solving ... -
Interactive Flow-Induced Vibrations of Two Staggered, Low Mass-Ratio Cylinders in the TrSL3 Flow Regime
(The American Society of Mechanical Engineers (ASME), 2018)Flow-induced vibrations (FIVs) of two elastically mounted circular cylinders in staggered arrangement were experimentally investigated. The Reynolds number range for all experiments (2.5 × 104 < Re < 1.2 × 105) was in the ... -
Bivariate Extreme Value Statistics of Offshore Jacket Support Stresses in Bohai Bay
(The American Society of Mechanical Engineers (ASME), 2018)This paper presents a generic Monte Carlo-based approach for bivariate extreme response prediction for fixed offshore structures, particularly jacket type. The bivariate analysis of extremes is often poorly understood and ... -
On the Generation of Isolated Green Water Events Using Wet Dam-Break
(The American Society of Mechanical Engineers (ASME), 2018)Green water occurs when an incoming wave exceeds the freeboard and propagates onto the deck of naval/offshore structures, such as floating production storage and offloading units and platforms. This water can affect the ... -
Computational Fluid Dynamics Simulations of Nonlinear Sloshing in a Rotating Rectangular Tank Using the Level Set Method
(The American Society of Mechanical Engineers (ASME), 2018)In this paper, numerical simulations of nonlinear sloshing in rectangular tanks are presented. Model implementations in the open source software reef3d are tested, and the results are compared with experimental data from ... -
Effects of Postweld Heat-Treatment on Girth Weld Tensile Property and Microstructure of High-Frequency Electric Resistance Welded Pipe for API X80 Grade Casing Pipe
(The American Society of Mechanical Engineers (ASME), 2018)The girth weld tensile properties of API X80 grade high-frequency electric resistance welded (HFW) steel pipe for surface casing with the chemical composition of 0.05C–1.6Mn–0.06Nb (mass %) and the diameter of 558.8 mm and ... -
Modeling of Wave Propagation in Drilling Fluid
(The American Society of Mechanical Engineers (ASME), 2018)The study presents a one-dimensional (1D) numerical model of wave propagation as well as transmission/reflection phenomena in Newtonian and non-Newtonian drilling mud flow associated with oil/gas drilling activities. ... -
Long-Term Extreme Response Analysis of Marine Structures Using Inverse SORM
(The American Society of Mechanical Engineers (ASME), 2018)In this paper, the first-order reliability method (FORM) found in connection with structural reliability analysis is first used in an inverse manner to efficiently obtain an approximate solution of the full long-term extreme ... -
Experimental Residual Stress and Geometric Imperfections on Pressure Hull Instability Analysis
(The American Society of Mechanical Engineers (ASME), 2018)Residual stress produced by cold bending and welding processes contributes to the collapse pressure reduction of submarine hulls. Usually, the residual stress profiles used to quantify this reduction are obtained from ... -
Time-Variant Ultimate Reliability Analysis of Jacket Platforms Considering a New Probabilistic Corrosion Model for the Persian Gulf
(The American Society of Mechanical Engineers (ASME), 2018)Corrosion is identified as one of the most important deterioration factors for structural integrity of offshore platforms. For reliability analysis of these platforms, a probabilistic model for prediction of long-term ... -
Finite Element Investigation on the Tensile Armor Wire Response of Flexible Pipe for Axisymmetric Loading Conditions Using an Implicit Solver
(The American Society of Mechanical Engineers (ASME), 2018)Composite flexible pipe is used in the offshore oil and gas industry for the transport of hydrocarbons, jumpers connecting subsea infrastructure, and risers with surface platforms and facilities. Although the material ... -
End Fitting Effect on Stress Evaluation of Tensile Armor Tendons in Unbonded Flexible Pipes Under Axial Tension
(The American Society of Mechanical Engineers (ASME), 2018)This paper deals with the effect of termination restraint due to end fitting on the stress evaluation of tensile armors in unbonded flexible pipes under axial tension. The problem is characterized by one single armoring ... -
An Automated Approach for Optimizing Monopile Foundations for Offshore Wind Turbines for Serviceability and Ultimate Limit States Design
(The American Society of Mechanical Engineers (ASME), 2018)Pile foundation design is conventionally conducted using a process of trial and error, where the dimensions of a pile are estimated and the performance is computed and compared with design criteria. The dimensions are ... -
Statistical Uncertainty Analysis in Time-Domain Fatigue Assessment of Steel Risers
(The American Society of Mechanical Engineers (ASME), 2018)This paper addresses the statistical uncertainty in long-term fatigue damage in offshore structures due to the short-term simulation length used in time domain analysis of stresses. The paper focuses on steel risers ... -
Bayesian Estimation of Directional Wave-Spectrum Using Vessel Motions and Wave-Probes: Proposal and Preliminary Experimental Validation
(The American Society of Mechanical Engineers (ASME), 2018)The measurement of the directional wave spectrum in oceans has been done by different approaches, mainly wave-buoys, satellite imagery and radar technologies; these methods, however, present some inherent drawbacks, e.g., ... -
Lazy-Wave Buoyancy Length Reduction Based on Fatigue Reliability Analysis
(The American Society of Mechanical Engineers (ASME), 2018)The current downturn of the oil and gas industry force managers to take hard decisions about the continuity of projects, resulting in delays, postponements, or even their cancellation. In order to keep with them, the rush ... -
Modeling Approach of Hydropneumatic Tensioner for Top-Tensioned Riser
(The American Society of Mechanical Engineers (ASME), 2018)A three-dimensional (3D) finite element analysis (FEA) model of top-tensioned riser (TTR) with hydropneumatic tensioner is proposed in this work. First, the tension calculation equation of the hydropneumatic system is ... -
An Object-Oriented Modeling Approach to Virtual Prototyping of Marine Operation Systems Based on Functional Mock-Up Interface Co-Simulation
(The American Society of Mechanical Engineers (ASME), 2018)This paper presents an object-oriented modeling (OOM) approach to model development of marine operation systems, specifically the hydraulic systems of marine cranes. Benefited from the rapid development of computation ... -
Finite Element and Smoothed Particle Hydrodynamics Modeling of Fluid–Structure Interaction Using a Unified Computational Methodology
(The American Society of Mechanical Engineers (ASME), 2018)This study illustrates a comparison of two numerical methods under a unified computational platform for solving fluid–structure interaction (FSI) problems. The first is an arbitrary Lagrangian–Eulerian (ALE)-based fluid ... -
Burial and Scour of Short Cylinders and Truncated Cones Due to Long-Crested and Short-Crested Nonlinear Random Waves Plus Currents
(The American Society of Mechanical Engineers (ASME), 2018)This paper provides a practical stochastic method by which the burial and scour depths of short cylinders and truncated cones exposed to long-crested (two-dimensional (2D)) and short-crested (three-dimensional (3D)) nonlinear ...