Journal of Offshore Mechanics and Arctic Engineering: Recent submissions
Now showing items 901-920 of 2185
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Numerical Modeling of the Dynamical Interaction Between Slug Flow and Vortex Induced Vibration in Horizontal Submarine Pipelines
(The American Society of Mechanical Engineers (ASME), 2014)Fatigue life of submarines pipelines is known to depend on many factors, e.g., materials, spanning length, vortex induced vibration (VIV), pipe soilinteraction, etc. In the case of VIV, the external flow due to marine ... -
Selective Surface Roughness to Suppress Flow Induced Motion of Two Circular Cylinders at 30,000 < Re < 120,000
(The American Society of Mechanical Engineers (ASME), 2014)In the Marine Renewable Energy Laboratory of the University of Michigan, selectively located surface roughness has been designed successfully to suppress vortexinduced vibrations (VIV) of a single cylinder by 60% compared ... -
RANS Simulation Versus Experiments of Flow Induced Motion of Circular Cylinder With Passive Turbulence Control at 35,000 < RE < 130,000
(The American Society of Mechanical Engineers (ASME), 2014)Twodimensional (2D) Unsteady ReynoldsAveraged Navier–Stokes equations (URANS) equations with the Spalart–Allmaras turbulence model are used to simulate the flow and body kinematics of the transverse motion of springmounted ... -
The Influence of Ship Collision Parameters on the Global Nonlinear Dynamic Response of a North Sea Jack Up Platform
(The American Society of Mechanical Engineers (ASME), 2014)In the present study, the influence of ship collision parameters related to vessel impact energy and also the impact scenario on the global nonlinear dynamic behavior of a threeleg jackup platform is investigated. A NorthSea ... -
A Global Energy Approach for Analysis of a Propagating Buckle in Submarine Pipelines
(The American Society of Mechanical Engineers (ASME), 2014)This paper presents a unique approach to analyze the steadystate buckle propagation phenomenon in underwater pipelines. In previous work, we restudied the buckling of a very long pipeline subjected to external pressure and ... -
Experimental and Analytical Study of Water Driven Debris Impact Forces on Structures1
(The American Society of Mechanical Engineers (ASME), 2014)Waterdriven debris generated during tsunamis and hurricanes can impose substantial impact forces on structures that are often not designed for such loads. This paper presents the design and results of an experimental and ... -
A Three Dimensional Curved Beam Element for Helical Components Modeling
(The American Society of Mechanical Engineers (ASME), 2014)The structural behavior of flexible pipes and umbilical cables is difficult to model due to their complex construction that includes components of different materials, shapes, and functions. Also, it is difficult to model ... -
Shape Effects on Viscous Damping and Motion of Heaving Cylinders1
(The American Society of Mechanical Engineers (ASME), 2014)Fluid viscosity is known to influence hydrodynamic forces on a floating body in motion, particularly when the motion amplitude is large and the body is of bluff shape. While traditionally these hydrodynamic force or force ... -
Design of Cross Sectional Layout of Steel Tube Umbilical
(The American Society of Mechanical Engineers (ASME), 2014)A design method is presented, which aims at the optimal crosssectional layout of the multilayer steel tube umbilical. The merit of the method is to improve the tension stiffness and the fatigue life of umbilical. An ... -
Deformation of Nets With Bending Stiffness Normal To Uniform Currents
(The American Society of Mechanical Engineers (ASME), 2014)The tremendous growth of the fish farming industry in Norway over the past decades was supported by new designs and materials for fish farms, enabling bigger fish cages to be positioned in more exposed sea areas. Today, ... -
Forces on Nets With Bending Stiffness—An Experimental Study on the Effects of Flow Speed and Angle of Attack
(The American Society of Mechanical Engineers (ASME), 2014)This study investigates the effects of changes in flow speed and angle of attack on drag and lift forces on nets with bending stiffness. Today most fish cage nets are made from nylon, but new cage materials are proposed ... -
Computation of Ship to Ship Interaction Forces by a Three Dimensional Potential Flow Panel Method in Finite Water Depth
(The American Society of Mechanical Engineers (ASME), 2014)A doublebody 3D potentialflow code developed earlier for computing hydrodynamic interaction forces and moments acting on the hulls of the ships sailing in close proximity with neighboring ships or some other obstacles, is ... -
On the Burst Strength Capacity of an Aging Subsea Gas Pipeline
(The American Society of Mechanical Engineers (ASME), 2014)Precise evaluation of the performance of aging structures is particularly essential in the oil and gas industry, where inaccurate predictions of structural performance may lead to significantly hazardous consequences. It ... -
Seabed Interaction Modeling Effects on the Global Response of Catenary Pipeline: A Case Study
(The American Society of Mechanical Engineers (ASME), 2014)A steel catenary riser (SCR) attached to a floating platform at its upper end encounters oscillations in and near its touchdown zone (TDZ), which results in interaction with the seabed. Field observations and design analysis ... -
An Improved Reliability Analysis Method for Mooring Dolphin Structures
(The American Society of Mechanical Engineers (ASME), 2014)A novel reliability evaluation procedure is proposed for analysis and design of offshore mooring dolphin structures (MDS). It is a hybrid approach consisting of an improved response surface method (IRSM), secondorder ... -
On the Estimation of Ocean Engineering Design Contours
(The American Society of Mechanical Engineers (ASME), 2014)Understanding extreme ocean environments and their interaction with fixed and floating structures is critical for offshore and coastal design. Design contours are useful to describe the joint behavior of environmental, ... -
Investigation on the Stability of Parallel and Oblique Plates as Suppressors of Vortex Induced Vibration of a Circular Cylinder
(The American Society of Mechanical Engineers (ASME), 2014)Experiments have been carried out with models of freetorotate parallel and oblique plates fitted to a rigid section of circular cylinder to investigate the effect of plate length and oblique angle on the stability of this ... -
Numerical Simulation of Water Entry and Sedimentation of an Elliptic Cylinder Using Smoothed Particle Hydrodynamics Method
(The American Society of Mechanical Engineers (ASME), 2014)This paper studies the twodimensional waterentry and sedimentation of an elliptic cylinder using the subparticle scale (SPS) turbulence model of a Lagrangian particlebased smoothedparticle hydrodynamics (SPH) method. The ... -
System Reliability Analysis by Monte Carlo Based Method and Finite Element Structural Models
(The American Society of Mechanical Engineers (ASME), 2014)In principle, the reliability of complex structural systems can be accurately predicted by Monte Carlo simulation. This method has several attractive features for structural system reliability, the most important being ... -
Extreme Response Statistics of Fixed Offshore Structures Subjected to Ringing Loads
(The American Society of Mechanical Engineers (ASME), 2014)This paper describes an efficient Monte Carlo based method for prediction of extreme response statistics of fixed offshore structures subjected to random seas. The nonlinear structural response known as “ringing†is ...