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Keywords: curvature
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Proceedings Papers

Paper presented at the The 31st International Ocean and Polar Engineering Conference, June 20–25, 2021
Paper Number: ISOPE-I-21-3180
..., on its own, suffers from one major drawback. That is, the smearing of the liquid–gas interface. This has a significant impact on the ability to compute interface curvature accurately and hence surface tension effects were often neglected. multiphase flow fluid dynamics upstream oil & gas...
Proceedings Papers

Paper presented at the The 31st International Ocean and Polar Engineering Conference, June 20–25, 2021
Paper Number: ISOPE-I-21-2125
... Abstract Traditional pipe-in-pipe systems installed by reel-lay are straightened on the lay-vessel. The process results in the inner and outer pipes having opposite residual moment and the inner pipe is under-straightened, which typically means hogging residual curvature in the sag bend...
Proceedings Papers

Paper presented at the The 31st International Ocean and Polar Engineering Conference, June 20–25, 2021
Paper Number: ISOPE-I-21-2127
... backing steel pipe provides structural strength while the CRA liner provides corrosion protection. piping design piping simulation corrosion management oilfield chemistry h2s management offshore pipeline upstream oil & gas mechanically lined pipe curvature liner engineering thickness...
Proceedings Papers

Paper presented at the The 31st International Ocean and Polar Engineering Conference, June 20–25, 2021
Paper Number: ISOPE-I-21-2137
... to find freespans and line curvatures from the terrain geometry. Eigenfrequencies and mode shapes are then derived for each span type, with current velocities and variables that define span vibration characteristics and fatigue. With the presented method, only estimates of soil conditions...
Proceedings Papers

Paper presented at the The 31st International Ocean and Polar Engineering Conference, June 20–25, 2021
Paper Number: ISOPE-I-21-2139
... system orientation order element coefficient friction stress amplitude cpu time upstream oil & gas stress coefficient controls and umbilicals mechanical stress global analysis order stress hysteresis stress range local analysis curvature fatigue damage st order helix fatigue life...
Proceedings Papers

Paper presented at the The 31st International Ocean and Polar Engineering Conference, June 20–25, 2021
Paper Number: ISOPE-I-21-2140
...'. It is therefore important that the accuracy of the test methods, including instrumentation for cross section measurement data, is evaluated. A key parameter in cross section analysis is bending stiffness. This paper presents a new method to measure the curvature during a sinusoidal bending stiffness test...
Proceedings Papers

Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-2176
... power cable cross section subsea system axial force structural behavior mesh size irregular shape curvature axial stiffness noncritical component sheath layer basecase filler1 2 filler1 filler2 On Modelling Alternatives of Non-critical Components in Dynamic Offshore Power Cables Naiquan...
Proceedings Papers

Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-2181
... in the Barents Sea is investigated. Numerical simulations are performed by using the software RIFLEX under SIMA workbench. Critical responses such as curvature and axial forces are checked. For the new offloading hose, it is important to check the combined bending-tension loading capacity. The results show...
Proceedings Papers

Paper presented at the The 30th International Ocean and Polar Engineering Conference, October 11–16, 2020
Paper Number: ISOPE-I-20-1265
...., 2019) provisional characteristics of iceberg drift in the Russian Arctic Seas were obtained. This paper focuses on ice cover drift patterns. trajectory east siberian sea expedition drift velocity curvature buoy ice floe drift variability artificial intelligence drift direction ice...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-176
... may end up with a suboptimal solution. vertical plane fitness constraint continuity machine learning autonomous underwater vehicle path planning kinematic constraint curvature evolutionary algorithm hierarchical path planning waypoint artificial intelligence iteration vehicle...
Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-123
... ABSTRACT This paper presents the introduction of a method and algorithm smoothing the raw data and calculating the radius of curvature of the as-laid position of the pipeline using local polynomial regression. It reports the development of a database of pipelines previously built using various...
Proceedings Papers

Paper presented at the The 28th International Ocean and Polar Engineering Conference, June 10–15, 2018
Paper Number: ISOPE-I-18-638
.... Helically wound wires of experience slip between themselves and adjacent fabric layers when they exposed to a large bending curvature, consequently the Euler beam equation is not valid for the riser analysis. This problem leads to an introduction of nonlinear finite element method and development of new...
Proceedings Papers

Paper presented at the The 28th International Ocean and Polar Engineering Conference, June 10–15, 2018
Paper Number: ISOPE-I-18-704
... ABSTRACT Controlled buckles in subsea pipelines exposed to expansion forces can be triggered by various methods such as snake-lay, installing sleepers/berms, or the residual curvature method (Statoil patent, 2002). The latter (RCM) is relatively new but is gaining popularity and has now been...
Proceedings Papers

Paper presented at the The 28th International Ocean and Polar Engineering Conference, June 10–15, 2018
Paper Number: ISOPE-I-18-311
... friction coefficient experimental result stiffness axial force unbonded flexible pipe strips characteristic coefficient different friction coefficient upstream oil & gas hysteretic curve friction dissipation friction energy dissipation flexible pipe curvature torsion Analysis...
Proceedings Papers

Paper presented at the The 28th International Ocean and Polar Engineering Conference, June 10–15, 2018
Paper Number: ISOPE-I-18-530
... the actual experimental operating performance, anti-tension and anti-compression strength, reliability, etc. Results indicate that non-metallic composite flexible risers perform well in anti-bending and anti-compression. It present an atypical catenary shape in water. Bending curvature near the touch down...
Proceedings Papers

Paper presented at the The 27th International Ocean and Polar Engineering Conference, June 25–30, 2017
Paper Number: ISOPE-I-17-705
... are used as the input parameters for the second stage analysis using a beam on elastic foundation program. It has been found that the correct inputs of soil movement magnitude and curvature are crucial in arriving at a reliable prediction of induced pile moment and deflection. INTRODUCTION With rapid...
Proceedings Papers

Paper presented at the The 27th International Ocean and Polar Engineering Conference, June 25–30, 2017
Paper Number: ISOPE-I-17-522
... efficiency, unlike other turbines, is not yet well optimized. rotor curvature numerical analysis valve shaft arc curvature diameter numerical simulation turbine efficiency design parameter artificial intelligence equation geometric parameter cross-flow turbine nozzle upstream oil...
Proceedings Papers

Paper presented at the The 27th International Ocean and Polar Engineering Conference, June 25–30, 2017
Paper Number: ISOPE-I-17-566
..., the sensitivity analysis is also carried out to examine the influence of various design parameters, such as critical curvature, slip stiffness and etc. The purpose of this research is to tentatively propose new assessment procedures to standardize the dynamic response analysis of flexible pipes in offshore...
Proceedings Papers

Paper presented at the The 27th International Ocean and Polar Engineering Conference, June 25–30, 2017
Paper Number: ISOPE-I-17-268
... on the tensile side of the cross-section is studied in this research as the most plausible case of ultimate failure for pressurized buried pipelines being subjected to monotonically increasing curvature. The results from two full-scale bending tests on X80 line pipe specimens that are pressurized up to 60...
Proceedings Papers

Paper presented at the The 27th International Ocean and Polar Engineering Conference, June 25–30, 2017
Paper Number: ISOPE-I-17-135
... or lateral bending. Because the web edge of the section is welded in shipbuilding, it should be flat in a plane, so this defect must be overcome or corrected. numerical simulation lateral node vertical deformation vertical displacement curvature simulation result vertical pre-bending amount...

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