Journal of Offshore Mechanics and Arctic Engineering: Recent submissions
Now showing items 681-700 of 2185
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Liquid Sloshing Suppression for Three-Phase Separators Installed on Floating Production Unit
(The American Society of Mechanical Engineers (ASME), 2018)In this study, a computational fluid dynamics model based on the volume of fluid (VOF) method is developed to simulate the dynamic sloshing response to external excitations. The modal analysis model based on the linear ... -
Long-Term Extreme Response and Reliability of a Vessel Rolling in Random Beam Seas
(The American Society of Mechanical Engineers (ASME), 2018)In this paper, the long-term extreme response of a vessel rolling in random beam seas and the associated reliability evaluation are addressed. The long-term response analysis is based on the upcrossing rates of the roll ... -
Amplitude Induced Nonlinearity in Piston Mode Resonant Flow: A Fully Viscous Numerical Analysis
(The American Society of Mechanical Engineers (ASME), 2018)Near field flow characteristics around catamarans close to resonant conditions involve violent viscous flow such as energetic vortex shedding and steep wave making. This paper presents a systematic and comprehensive numerical ... -
Computational Fluid Dynamics Reproduction of Nonlinear Loads on a Vertical Column During Extreme Irregular Wave Events
(The American Society of Mechanical Engineers (ASME), 2018)Recently, a method for numerical reproduction of measured irregular wave events has been developed. The measured motion of the wave maker flaps defines the wave kinematics at the boundary of the numerical simulation in ... -
Turbulence Over a Pair of Submerged Hemispheres in Presence of Surface Waves and Following Current
(The American Society of Mechanical Engineers (ASME), 2018)The paper presents an experimental study in a laboratory flume to investigate the combined wave–current flow over a pair of hemispherical obstacles placed at a relative spacing L/d = 4, where L is a center to center distance ... -
Modeling and Simulation of Deepwater Pipeline S-Lay With Coupled Dynamic Positioning
(The American Society of Mechanical Engineers (ASME), 2018)Dynamic position (DP) control and pipeline dynamics are the two main parts of the deepwater S-lay simulation model. In this study, a fully coupled analysis tool for deepwater S-lay deployment by dynamically positioned ... -
Simplified Finite Element Models to Study the Wet Collapse of Straight and Curved Flexible Pipes
(The American Society of Mechanical Engineers (ASME), 2017)When the external sheath of flexible pipes experiences damage, seawater floods the annulus. Then, the external pressure is applied directly on the internal polymeric layer, and the load is transferred to the interlocked ... -
Impact of Climate Change on Design of Offshore Wind Turbine Considering Dynamic Soil–Structure Interaction
(The American Society of Mechanical Engineers (ASME), 2017)This study assesses the serviceability and fatigue limit states of the offshore wind turbine (OWT) founded in clay incorporating the impact of climate change. Two different offshore locations at east and west coasts in ... -
Dynamic Analysis of a Truss Spar-Type Floating Foundation for 5 MW Vertical-Axis Wind Turbine
(The American Society of Mechanical Engineers (ASME), 2017)This paper studies the dynamic characteristic of the truss Spar-type floating foundation used to support the offshore vertical-axis wind turbine (VAWT). The effects of changes in foundation structural parameters on its ... -
Velocity Effect on the Bending Failure of Ice Sheets Against Wide Sloping Structures
(The American Society of Mechanical Engineers (ASME), 2017)Sloping structures are widely used in ice-infested waters because of their ability to reduce ice loading by inducing a bending failure in ice sheets. From model test data, a significant velocity effect on the breaking load ... -
Comparison of Various Surrogate Models to Predict Stress Intensity Factor of a Crack Propagating in Offshore Piping
(The American Society of Mechanical Engineers (ASME), 2017)This paper examines the applicability of the different surrogate-models (SMs) to predict the stress intensity factor (SIF) of a crack propagating in topside piping, as an inexpensive alternative to the finite element methods ... -
Inverse Estimation of Local Slamming Loads on a Jacket Structure
(The American Society of Mechanical Engineers (ASME), 2017)Slamming loads from plunging breaking waves feature a high impulsive force and a very short duration. It is difficult to measure these loads directly in experiments due to the dynamics of the structures. In this study, ... -
Utilizing the Ensemble Kalman Filter and Ensemble Kalman Smoother for Combined State and Parameter Estimation of a Three-Dimensional Towed Underwater Cable Model
(The American Society of Mechanical Engineers (ASME), 2017)A finite difference method (FDM) solving the coupled partial differential equations governing three-dimensional (3D) motions of a towed underwater cable has been implemented in a combined ensemble Kalman filter (EnKF) and ... -
A Finite Element Model for Prediction of the Bending Stress of Umbilicals
(The American Society of Mechanical Engineers (ASME), 2017)Umbilical is an important equipment in the subsea production to supply a connection between the floater and the subsea well. Analyzing strength and fatigue behaviors under bending is a key requirement to assure safety. An ... -
A Finite Element Method-Based Potential Theory Approach for Optimal Ice Routing
(The American Society of Mechanical Engineers (ASME), 2017)Shipping in ice-covered regions has gained high attention within recent years. Analogous to weather routing, the occurrence of ice in a seaway affects the selection of the optimal route with respect to the travel time or ... -
Investigation of the Dynamic Loads on a Vertically Oscillating Circular Cylinder Close to the Sea Bed: The Role of Viscosity
(The American Society of Mechanical Engineers (ASME), 2017)The flow around an oscillating cylinder close to a horizontal solid boundary is studied to gather information about the load acting on pipelines, while they are laid on the sea bottom. The problem is simplified assuming ... -
Methodology for Assessment of the Allowable Sea States During Installation of an Offshore Wind Turbine Transition Piece Structure Onto a Monopile Foundation
(The American Society of Mechanical Engineers (ASME), 2017)In this paper, a methodology suitable for assessing the allowable sea states for installation of a transition piece (TP) onto a monopile (MP) foundation with focus on the docking operation is proposed. The TP installation ... -
Multivariate Time Series Data Mining in Ship Monitoring Database
(The American Society of Mechanical Engineers (ASME), 2017)A framework is presented for data mining in multivariate time series collected over hours of ship operation to extract vessel states from the data. The measurements made by a ship monitoring system lead to a collection of ... -
Improvement of UNS S32205 Duplex Welds by GMAW and Controlled Magnetic Field for Offshore Pipelines and Flowlines Applications
(The American Society of Mechanical Engineers (ASME), 2017)Mechanical properties and corrosion resistance of UNS S32205 duplex stainless steel (DSS) welds obtained under the application of controlled magnetic fields were evaluated in the context of offshore pipelines and flowlines ... -
Effects of Reeling on Pipe Structural Performance—Part I: Experiments
(The American Society of Mechanical Engineers (ASME), 2017)The winding and unwinding of a pipeline in the reeling installation process involve repeated excursions into the plastic range of the material, which induce ovality, elongation, and changes to the mechanical properties. ...