Journal of Offshore Mechanics and Arctic Engineering: Recent submissions
Now showing items 921-940 of 2185
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Transient Flow in Natural Gas Pipelines Using Implicit Finite Difference Schemes
(The American Society of Mechanical Engineers (ASME), 2014)Transmission of natural gas through high pressure pipelines has been modeled by numerically solving the governing equations for onedimensional compressible flow using implicit finite difference methods. In the first case ... -
A Data Driven Mode Identification Algorithm for Riser Fatigue Damage Assessment
(The American Society of Mechanical Engineers (ASME), 2014)A wellestablished empirical procedure, which we refer to as weighted waveform analysis (WWA), is employed to reconstruct a model riser's response over its entire length using a limited number of strain measurements. The ... -
Numerical Vortex Induced Vibration Prediction of Marine Risers in Time Domain Based on a Forcing Algorithm
(The American Society of Mechanical Engineers (ASME), 2014)Vortexinduced vibration (VIV) of marine risers poses a significant challenge as the offshore oil and gas industry moves into deep water. A timedomain analysis tool has been developed to predict the VIV of marine risers ... -
Linear and Nonlinear Sectional Loads With Potential and Field Methods
(The American Society of Mechanical Engineers (ASME), 2014)A Rankine source method is applied to predict linear and weakly nonlinear sectional loads of a modern container ship. The method uses solution in the frequency domain, linearized with respect to wave amplitude about the ... -
Flexible Pipes: Influence of the Pressure Armor in the Wet Collapse Resistance
(The American Society of Mechanical Engineers (ASME), 2014)When submitted to high external pressure, flexible pipes may collapse. If the external sheath is damaged, all the external pressure is directly applied on the internal polymeric layer that transmits the loading to the ... -
A Rankine Panel Method for Added Resistance of Ships in Waves
(The American Society of Mechanical Engineers (ASME), 2014)A new Rankine panel method and an extended ReynoldsAveraged Navier–Stokes (RANS) solver were employed to predict added resistance in head waves at different Froude numbers of a Wigley hull, a large tanker, and a modern ... -
Simulating Ice Sloping Structure Interactions With the Cohesive Element Method
(The American Society of Mechanical Engineers (ASME), 2014)The major processes that occur when level ice interacts with sloping structures (especially wide structures) are the fracturing of ice and upcoming ice fragments accumulating around the structure. The cohesive zone method, ... -
Empirical Procedures for Long Term Prediction of Fatigue Damage for an Instrumented Marine Riser
(The American Society of Mechanical Engineers (ASME), 2014)Slender marine risers used in deepwater applications can experience vortexinduced vibration (VIV). It is becoming increasingly common for field monitoring campaigns to be undertaken wherein data loggers such as strain ... -
Flow Fields Inside Stocked Fish Cages and the Near Environment
(The American Society of Mechanical Engineers (ASME), 2014)This study explores the average flow field inside and around stocked Atlantic salmon (Salmo salar L.) fish cages. Laboratory tests and field measurements were conducted to study flow patterns around and through fish cages ... -
Fully Nonlinear Wave Current Body Interaction Analysis by a Harmonic Polynomial Cell Method
(The American Society of Mechanical Engineers (ASME), 2014)A new numerical 2D cell method has been proposed by the authors, based on representing the velocity potential in each cell by harmonic polynomials. The method was named the harmonic polynomial cell (HPC) method. The method ... -
Simultaneous Wake and Vortex Induced Vibrations of a Cylinder With Two Degrees of Freedom in Each Direction
(The American Society of Mechanical Engineers (ASME), 2014)The flowinduced vibration of one cylinder in the wake of another is the subject of continuing interest in connection with interactions between vertical tension risers in deep water. When one riser is downstream of another, ... -
Computation of Motion and Added Wave Resistance With the Panel Free Method
(The American Society of Mechanical Engineers (ASME), 2014)Computations have been performed to predict motions and added wave resistances for ships at forward speeds. The radiation and diffraction problems of a ship with forward speed are solved with the panelfree method in the ... -
Rigid Object Water Entry Impact Dynamics: Finite Element/Smoothed Particle Hydrodynamics Modeling and Experimental Validation
(The American Society of Mechanical Engineers (ASME), 2014)A numerical study on the dynamic response of a generic rigid waterlanding object (WLO) during water impact is presented in this paper. The effect of this impact is often prominent in the design phase of the reentry project ... -
Bi Linear Fatigue and Fracture Approach for Safety Analysis of an Offshore Structure
(The American Society of Mechanical Engineers (ASME), 2014)The design of welded structures for the fatigue limit state is normally carried out by means of either linear or bilinear SN curves, which have been found adequate to predict crack initiation only. To properly assess the ... -
Fatigue Testing of Full Scale Girth Welded Pipes Under Variable Amplitude Loading
(The American Society of Mechanical Engineers (ASME), 2014)In the fatigue design of steel catenary risers, there are concerns regarding the fatigue damage to girth welds from low stresses, below the constant amplitude fatigue limit, in the loading spectrum and the validity of ... -
Comparative Study of the Shock Resistance of Rubber Protective Coatings Subjected to Underwater Explosion
(The American Society of Mechanical Engineers (ASME), 2014)Finite element simulations of rubber protective coatings with different structures under two dynamic loading cases were performed. They were monolithic coating and honeycomb structures with three different cell topologies ... -
An Experimental Approach for the Offshore Launching of Jack Ups
(The American Society of Mechanical Engineers (ASME), 2014)Recently, as part of the building contract for the new Brazilian jackup drilling platforms, an operational challenge was raised: to launch these units from the building site, where neither dry dock nor launching ground ... -
Reliability Analysis of Offshore Production Facilities Under Arctic Conditions Using Reliability Data From Other Areas
(The American Society of Mechanical Engineers (ASME), 2014)The development of offshore energy resources involves highly complex and extensive technological processes. Reliability evaluation of offshore production facilities provides essential information in the design and operation ... -
Experimental Comparison of Three Floating Wind Turbine Concepts
(The American Society of Mechanical Engineers (ASME), 2014)Beyond many of Earth's coasts exists a vast deepwater wind resource that can be tapped to provide substantial amounts of clean, renewable energy. However, much of this resource resides in waters deeper than 60 m where ... -
Coupling Between Roll Motions of an FLNG Vessel and Internal Sloshing
(The American Society of Mechanical Engineers (ASME), 2014)A series of twodimensional model tests has been conducted to study the coupling between global roll motions of a floating liquefied natural gas (FLNG) vessel and internal sloshing. The model of the FLNG is allowed to move ...