Journal of Offshore Mechanics and Arctic Engineering: Recent submissions
Now showing items 701-720 of 2185
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A New Holistic Approach for Subsea Pipeline Upheaval Buckling Design
(The American Society of Mechanical Engineers (ASME), 2017)For a trenched and buried pipeline, the propensity to upheaval buckling (UHB) is a major design concern. Predictive UHB design is typically required at the outset to determine both trenching and backfilling requirements. ... -
Effects of Reeling on Pipe Structural Performance—Part II: Analysis
(The American Society of Mechanical Engineers (ASME), 2017)Part II presents two modeling schemes for simulating the reeling/unreeling of a pipeline, with the aim of establishing the degrading effect of the process on the structural performance of the pipeline. A three-dimensional ... -
Dynamic Effect of a Flexible Riser in a Fully Connected Semisubmersible Drilling Rig Using the Absolute Nodal Coordinate Formulation
(The American Society of Mechanical Engineers (ASME), 2017)The motion of a semisubmersible drilling rig must be checked in advance to satisfy the safety criteria of the rig. However, the complexity of the rig's connections makes it difficult to analyze the rig motion during the ... -
Experimental Study of Shaft Resistance of Model Piles in Fluidized and Nonfluidized Fine Sand
(The American Society of Mechanical Engineers (ASME), 2017)Torpedo piles installed by dynamic penetration have been used as anchors in the Brazilian offshore oil production infrastructure practice for two decades. Dynamic penetration aided by fluidization of the soil during pile ... -
Fatigue Damage Study of Helical Wires in Catenary Unbonded Flexible Riser Near Touchdown Point
(The American Society of Mechanical Engineers (ASME), 2017)This study presents an analytical model of flexible riser and implements it into finite-element software abaqus to investigate the fatigue damage of helical wires near touchdown point (TDP). In the analytical model, the ... -
Continuous Line Bucket Lifting Versus Pipe Lifting
(The American Society of Mechanical Engineers (ASME), 2017)In the literature, the continuous line bucket (CLB) lifting system and the pipe lifting system (PLS), as two typical mineral lifting methods in deep sea mining (DSM) systems, have been discussed since the 1960s. The purpose ... -
Study on Hydraulic Transport of Large Solid Particles in Inclined Pipes for Subsea Mining
(The American Society of Mechanical Engineers (ASME), 2017)For subsea mining, the prediction of pressure loss due to the hydraulic transport of solid particles in the flexible pipe to connect the mining tool and the lifting system is important for the design of mining system. The ... -
Pitting Degradation Modeling of Ocean Steel Structures Using Bayesian Network
(The American Society of Mechanical Engineers (ASME), 2017)Modeling depth of long-term pitting corrosion is of interest for engineers in predicting the structural longevity of ocean infrastructures. Conventional models demonstrate poor quality in predicting the long-term pitting ... -
Multi-Objective Shape Optimization Design for Liquefied Natural Gas Cryogenic Helical Corrugated Steel Pipe
(The American Society of Mechanical Engineers (ASME), 2017)Recently, the flexible cryogenic hose has been preferred as an alternative to exploit offshore liquefied natural gas (LNG), in which helical corrugated steel pipe is the crucial component with C-shaped corrugation. Parametric ... -
Full-Scale Fairing Qualification Tests
(The American Society of Mechanical Engineers (ASME), 2017)Production risers as well as drilling risers are often exposed to ocean currents. Vortex-induced vibrations (VIVs) have been observed in the field and can cause fatigue failure and excessive drag on the riser. In order to ... -
Suppression of Irregular Frequency Effect in Hydrodynamic Problems and Free-Surface Singularity Treatment
(The American Society of Mechanical Engineers (ASME), 2017)Multibody operations are routinely performed in offshore activities, for example, the floating liquefied natural gas (FLNG) and liquefied natural gas carrier (LNGC) side-by-side offloading case. To understand the phenomenon ... -
Numerical Study of Seabed Boundary Layer Flow Around Monopile and Gravity-Based Wind Turbine Foundations
(The American Society of Mechanical Engineers (ASME), 2017)Computational fluid dynamics (CFD) has been used to study the seabed boundary layer flow around monopile and gravity-based offshore wind turbine foundations. The gravity-based foundation has a hexagonal bottom slab (bottom ... -
Dynamic Responses of Jacket-Type Offshore Wind Turbines Using Decoupled and Coupled Models
(The American Society of Mechanical Engineers (ASME), 2017)This paper presents numerical studies of the dynamic responses of two jacket-type offshore wind turbines (OWTs) using both decoupled and coupled models. The investigated structures are the OC4 (Offshore Code Comparison ... -
Experimental Investigation on Vortex-Induced Vibration of a Free-Hanging Riser Under Vessel Motion and Uniform Current
(The American Society of Mechanical Engineers (ASME), 2017)A model test of a free-hanging riser under vessel motion and uniform current is performed in the ocean basin at Shanghai Jiao Tong University to address four topics: (1) confirm whether vortex-induced vibration (VIV) can ... -
Wave Response of Closed Flexible Bags
(The American Society of Mechanical Engineers (ASME), 2017)Recent environmental considerations, as salmon lice, escape of farmed fish and release of nutrients, have prompted the aquaculture industry to consider the use of closed fish production systems (CFPS). The use of such ... -
Bilge-Keel Influence on Free Decay of Roll Motion of a Realistic Hull1
(The American Society of Mechanical Engineers (ASME), 2017)The prediction of roll motion of a ship with bilge keels is particularly difficult because of the nonlinear characteristics of the viscous roll damping. Flow separation and vortex shedding caused by bilge keels significantly ... -
Damping Effect on the Wave Propagation in Carbon Steel Pipelines Under Fluid Hammer Conditions
(The American Society of Mechanical Engineers (ASME), 2017)A sudden reduction of the fluid flow yields a pressure shock, which travels along the pipeline with a high-speed. Due to this transient loading, dynamic hoop stresses are developed that may cause catastrophic damages in ... -
Numerical Investigation of Focused Waves and Their Interaction With a Vertical Cylinder Using REEF3D
(The American Society of Mechanical Engineers (ASME), 2017)For the stability of offshore structures, such as offshore wind foundations, extreme wave conditions need to be taken into account. Waves from extreme events are critical from the design perspective. In a numerical wave ... -
New Methodology for the Determination of the Vertical Center of Gravity of In-Service Semisubmersibles: Proposal and Numerical Assessment
(The American Society of Mechanical Engineers (ASME), 2017)Along its lifetime, an offshore unit is subjected to several equipment interventions. These modifications may include large conversions in loco that usually are not adequately documented. Hence, the accurate determination ... -
Using Design of Experiments and Design Optimization to Determine Statically Equivalent Mooring System on Truncated Water Depth
(The American Society of Mechanical Engineers (ASME), 2017)Several procedures have been proposed and developed to overcome the challenge in ultradeepwaters testing. A realistic alternative approach uses a hybrid passive methodology through equivalent truncated mooring systems. ...