Journal of Offshore Mechanics and Arctic Engineering: Recent submissions
Now showing items 621-640 of 2185
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Load Mitigation Using Slotted Flaps in Offshore Wind Turbines
(The American Society of Mechanical Engineers (ASME), 2018)This paper focuses on load mitigation by implementing controllable trailing-edge slotted flaps on the blades of an offshore wind turbine (OWT). The benchmark NREL 5 MW horizontal axis OWT is subjected to coupled stochastic ... -
A Flow-Sediment Numerical Model Using One and Two Dimensions for the Yongding New Estuary
(The American Society of Mechanical Engineers (ASME), 2018)This paper derived the continuity and momentum equations of solid–liquid two-phase flows using infinitesimal body analysis and obtained well-posed equations of two-dimensional (2D) flow-sediment movement. Based on the ... -
Steady-State Hydrodynamic Power Attenuation by Finned-Buoys
(The American Society of Mechanical Engineers (ASME), 2018)Results of experimental and computational fluid dynamics (CFD) studies conducted to compare the flow-energy-attenuating performances of two different buoy configurations are presented. A finned-body was experimentally ... -
Numerical and Experimental Investigations on the Hydrodynamic Performance of a Tidal Current Turbine
(The American Society of Mechanical Engineers (ASME), 2018)In this paper, numerical and experimental investigations are presented on the hydrodynamic performance of a horizontal tidal current turbine (TCT) designed and made by our Dalian University of Technology (DUT) research ... -
An Innovative Device to Enhance Conductor Bearing Capacity in Deepwater Drilling Operations
(The American Society of Mechanical Engineers (ASME), 2018)Deepwater environments raise higher demand on the bearing capacity of the drilling conductor below the mudline. To deal with this problem, a conductor bearing capacity enhancement device was designed. The setting capability ... -
Evaluation of Nonlinear Material Behavior for Offshore Structures Subjected to Accidental Actions
(The American Society of Mechanical Engineers (ASME), 2018)Evaluation of the nonlinear structural response of any structure is a challenging task; a range of input parameters are needed, most of which have significant statistical variability and the evaluations require a high ... -
Free Vibration Analysis of Functionally Graded Plates on Two-Parameter Elastic Supports and in Contact With Stationary Fluid
(The American Society of Mechanical Engineers (ASME), 2018)Free vibration analysis of functionally graded (FG) rectangular plates on two-parameter elastic foundation and vertically coupled with fluid is the objective of this work. The fluid domain is considered to be infinite in ... -
Numerical Uncertainty Analysis in Regular Wave Modeling
(The American Society of Mechanical Engineers (ASME), 2018)In recent decades, the use of computational fluid dynamics (CFD) in many areas of engineering as a research and development tool has seen remarkable growth. Recently, an increasing concern with the assessment of the quality ... -
Numerical Prediction of Added Power in Seaway
(The American Society of Mechanical Engineers (ASME), 2018)The paper describes a numerical approach to predict required added power for propulsion in waves. Such predictions are important to address fuel consumption in seaway and define suitable operating point and sea margin, as ... -
Structural Properties and Simple Compression Behavior of Laboratory-Made Polycrystalline Isotropic Ice at High Temperatures
(The American Society of Mechanical Engineers (ASME), 2018)Polycrystalline isotropic ice was selected as the material of choice for this fundamental study on the mechanical behavior of ice. Two essential properties of the ice structure are the porosity and degree of anisotropy ... -
Simultaneous Measurement of Free Surface Elevation and Three-Component Velocity Field Around a Translating Surface-Piercing Foil
(The American Society of Mechanical Engineers (ASME), 2018)Two methods are investigated to simultaneously obtain both three-dimensional (3D) velocity field and free surface elevations (FSEs) measurements near a surface piercing foil, while limiting the equipment. The combined ... -
Estimation of Short-and Long-Term Probability Distributions of Wave-Induced Loads Acting on a Cruise Vessel in Extreme Seas
(The American Society of Mechanical Engineers (ASME), 2018)A time domain code based on strip theory is applied to calculate the probability distributions of relative motions and bending moments of a cruise ship in a set of extreme seas. The code includes two levels of complexity. ... -
Maintenance Planning of an Offshore Wind Turbine Using Stochastic Petri Nets With Predicates
(The American Society of Mechanical Engineers (ASME), 2018)Operations and maintenance activities have a significant impact on the energy cost for offshore wind turbines. Analytical methods such as reliability block diagrams and Markov processes along with simulation approaches ... -
A Frictional Contact Element for Flexible Pipe Modeling With Finite Macroelements
(The American Society of Mechanical Engineers (ASME), 2018)The layers of unbounded flexible pipes have relative movement, enhancing its capabilities to handle curvatures and moment loads. In a simplified approach, those pipes can be described using bonded elements; but to really ... -
Hydrodynamic Study on Water Column Oscillation of Varying Cross-Sectional Moonpool and Its Effect on Resistance of a Drill Ship
(The American Society of Mechanical Engineers (ASME), 2018)A moonpool is meant for access to the underwater part of the ship from onboard. It is a vertical opening along the depth having an effect on the performance of the floating platform. Inside the moonpool, water motions in ... -
Bonded Flexible Pipe Model Using Macroelements
(The American Society of Mechanical Engineers (ASME), 2018)Flexible pipes are structures composed by many layers that vary in composition and shapes. The structural behavior of each layer is defined by the role it must play. The construction of flexible pipes is such that the ... -
Model Tests of a Caisson in Wet Towing for Assessing Resistance and Stability in Calm Water and Waves
(The American Society of Mechanical Engineers (ASME), 2018)A series of model tests of a caisson in wet towing were conducted in a towing tank to assess the stability and effective power requirement in calm water and head sea conditions. The scale ratio of the model was 1/30, and ... -
Experimental Study on the Hydrodynamic Performance of Floating Pontoon Type Breakwater With Skirt Walls
(The American Society of Mechanical Engineers (ASME), 2018)Floating breakwaters (FBWs) are widely used in moderate wave climatic conditions for coastal protection against erosion and for wave reduction around offshore loading terminals and open ocean construction sites. Literature ... -
Slug Flow and Waves Induced Motions in Flexible Riser
(The American Society of Mechanical Engineers (ASME), 2018)Flexible risers provide optimum solutions for deep water offshore fields. Reliable dynamic analysis of this kind of slender structure is crucial to ensure safety against long time fatigue failure. Beyond the effects from ... -
Dynamic Performance of Annular Blowout Preventer Hydraulic Seals in Deepwater Environments
(The American Society of Mechanical Engineers (ASME), 2018)Presented is the performance analysis of annular blowout preventer (BOP) reciprocating elastomer hydraulic seals operating in subsea environments. The method is based on a systems-level model that combines the effects of ...