Journal of Offshore Mechanics and Arctic Engineering: Recent submissions
Now showing items 741-760 of 2185
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Sensitivity to Zone Covering of the Map of Passive Turbulence Control to Flow-Induced Motions for a Circular Cylinder at 30,000 ≤ Re ≤ 120,000
(The American Society of Mechanical Engineers (ASME), 2017)Passive turbulence control (PTC) in the form of two straight roughness strips with variable width, and thickness about equal to the boundary layer thickness, is used to modify the flow-induced motions (FIM) of a rigid ... -
The Underwater Blast Resistance of Sacrificial Claddings With Stepwise Graded Cellular Cores
(The American Society of Mechanical Engineers (ASME), 2017)One-dimensional (1D) analytical model and finite element (FE) simulation are employed to investigate the shock mitigation capability of stepwise graded cellular claddings to underwater blast. To build the analytical model, ... -
Benchmarking of a Computational Fluid Dynamics-Based Numerical Wave Tank for Studying Wave Load Effects on Fixed and Floating Offshore Structures
(The American Society of Mechanical Engineers (ASME), 2017)A computational fluid dynamics (CFD) based numerical wave tank (NWT) is developed and verified to study wave load effects on fixed and free floating offshore structures. The model is based on solving Navier–Stokes equations ... -
A Comparative Assessment of Simplified Models for Simulating Parametric Roll
(The American Society of Mechanical Engineers (ASME), 2017)The motion of a ship/offshore platform at sea is governed by a coupled set of nonlinear differential equations. In general, analytical solutions for such systems do not exist and recourse is taken to time-domain simulations ... -
Hydrodynamics of the Interceptor Analysis Via Both Ultrareduced Model Test and Dynamic Computational Fluid Dynamics Simulation
(The American Society of Mechanical Engineers (ASME), 2017)This work investigates the hydrodynamic effects of introducing interceptors on fast vessels. Interceptors are vertical flat blades installed at the bottom of the stern vessel. They cause changes in pressure magnitudes ... -
First Step Toward the Codesign of Planing Craft and Active Control Systems
(The American Society of Mechanical Engineers (ASME), 2017)This paper takes a novel approach to the design of planing craft with active control systems (ACS) by codesigning the longitudinal center of gravity (lcg) and ACS, and compares its performance with a vessel where the lcg ... -
Minimization of Risk Assessments' Variability in Technology Qualification Processes
(The American Society of Mechanical Engineers (ASME), 2017)Technology qualification (TQ) centers on establishing an acceptable level of confidence in innovative aspects of new technologies that are not addressed by the normative standards and/or common certification procedures. ... -
Study on Mechanism of Freeze-Thaw Cycles Induced Changes in Soil Strength Using Electrical Resistivity and X-Ray Computed Tomography
(The American Society of Mechanical Engineers (ASME), 2017)In this study, freeze-thaw cycles were conducted on samples of a fine grained soil from the Qinghai–Tibetan plateau which had been prepared with different dry unit weights. During freeze-thaw cycles, electrical resistivity ... -
Marine Engine-Centered Data Analytics for Ship Performance Monitoring
(The American Society of Mechanical Engineers (ASME), 2017)This study proposes marine engine centered data analytics as a part of the ship energy efficiency management plan (SEEMP). The SEEMP enforces various emission control measures to improve ship energy efficiency by considering ... -
Arrangement Method of Offshore Topside Based on an Expert System and Optimization Technique
(The American Society of Mechanical Engineers (ASME), 2017)An offshore platform has several modules that contain much of the equipment needed for oil and gas production, and these are placed on the limited space of the topside. Furthermore, the equipment layout should leave ... -
Turbulence Characteristics of Flow Under Combined Wave–Current Motion
(The American Society of Mechanical Engineers (ASME), 2017)This paper describes an experimental study carried out in a laboratory flume with a smooth surface to investigate the effect of a surface wave on unidirectional current. The measured velocity data were analyzed within the ... -
Finite Element Analysis of Flexible Pipes Under Axial Compression: Influence of the Sample Length
(The American Society of Mechanical Engineers (ASME), 2017)In order to study the axial compressive behavior of flexible pipes, a nonlinear tridimensional finite element model was developed. This model recreates a five layer flexible pipe with two tensile armor layers, an external ... -
Review of Steel Lazy Wave Riser Concepts for the North Sea
(The American Society of Mechanical Engineers (ASME), 2017)A steel riser has benefits over a flexible riser in terms of pressure rating and cost. A steel riser in lazy wave configuration (steel lazy wave riser (SLWR)) is often considered as a good alternative solution for harsh ... -
Ice Gouge Depth Determination Via an Efficient Stochastic Dynamics Technique
(The American Society of Mechanical Engineers (ASME), 2017)A simplified model of the motion of a grounding iceberg for determining the gouge depth into the seabed is proposed. Specifically, taking into account uncertainties relating to the soil strength, a nonlinear stochastic ... -
A Computationally Efficient Implementation of Nonzero-Speed Transient Green Functions for Zero-Speed Nonlinear Seakeeping Problems
(The American Society of Mechanical Engineers (ASME), 2017)The proposed methodology is a time-domain panel method where the transient Green functions (GFs) used for the estimation and implementation of the free-surface effects on the vessel's motions are estimated assuming constant ... -
Effects of Blade Pitch, Rotor Yaw, and Wind–Wave Misalignment on a Large Offshore Wind Turbine Dynamics in Western Gulf of Mexico Shallow Water in 100-Year Return Hurricane
(The American Society of Mechanical Engineers (ASME), 2017)To determine the optimal park configuration of a large offshore turbine in a hurricane, a study is conducted on effects of blade pitch and rotor yaw, and wind–wave misalignment, in a 100-year return hurricane on a 13.2-MW ... -
A Novel Restraining System for a Powerless Advancing Ship: A Combined Theoretical and Experimental Investigation
(The American Society of Mechanical Engineers (ASME), 2017)A novel flexible restraining system is proposed to protect a waterway crossing road, a railway, or a combined bridge when a powerless advancing ship approaches such a structure. Direct collision with principal bridge ... -
Numerical and Experimental Analysis of Added Resistance of Ships in Waves
(The American Society of Mechanical Engineers (ASME), 2017)Two Reynolds-Averaged Navier–Stokes (RANS) based field methods numerically predicted added resistance in regular head waves for a 14,000 TEU containership and a medium size cruise ship. Long and short waves of different ... -
Assessment of Flexure Failure Models Using Loads Measured on the Conical Piers of the Confederation Bridge During 1998–2008
(The American Society of Mechanical Engineers (ASME), 2017)The Confederation Bridge spans across the Northumberland Strait in Eastern Canada connecting Prince Edward Island to mainland Canada through New Brunswick. Due to the presence of ice during each winter, the bridge piers ... -
A Statistical Analysis of First-Year Level Ice Uniaxial Compressive Strength in the Svalbard Area
(The American Society of Mechanical Engineers (ASME), 2017)This paper proposes a methodology for a statistical analysis of uniaxial compressive strength and applies it to full-scale data collected in the Svalbard area from 2005 to 2011. A total of 894 samples were compressed over ...