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Proceedings Papers

Proc. ASME. OMAE2023, Volume 7: CFD & FSI, V007T08A033, June 11–16, 2023
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2023-105583
... Abstract Vortex Induced Vibrations (VIV) are one of the major design concerns for deep-water riser systems. Large uncertainties and limitations in the existing prediction tools and design practice lead to not only costly riser designs, but also have a negative impact on the floaters...
Proceedings Papers

Proc. ASME. OMAE2023, Volume 3: Materials Technology; Pipelines, Risers, and Subsea Systems, V003T04A005, June 11–16, 2023
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2023-103244
... to VIV induced fatigue damage: A lazy-wave power cable attached to the seabed, and a W-Shaped cable directly connected between two FOWTs. The model is used to compare the lazy-wave and W-shape power cable configurations; identifying the propensity of each to experience direct, heave or surge/sway induced...
Proceedings Papers

Proc. ASME. OMAE2022, Volume 7: CFD and FSI, V007T08A030, June 5–10, 2022
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2022-79191
... Abstract Vortex induced vibrations (VIV) may be developed in the sag-bend area of steel catenary risers (SCRs) and lazy wave risers (SLWRs) induced by the top motions. There is lack of reliable tools to predict VIV responses in such oscillatory flow conditions in the riser design. A time-domain...
Proceedings Papers

Proc. ASME. OMAE2021, Volume 9: Ocean Renewable Energy, V009T09A001, June 21–30, 2021
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2021-62530
... Abstract A data-driven hydrodynamic force model is developed to model the dynamic forces on an oscillating circular cylinder for flow conditions where Vortex-Induced-Vibrations (VIV) are known to occur. The model is developed for use in future control systems to improve VIV-based energy...
Proceedings Papers

Proc. ASME. OMAE2021, Volume 4: Pipelines, Risers, and Subsea Systems, V004T04A029, June 21–30, 2021
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2021-63747
... conservative or plainly wrong. This paper reviews some key aspects of the DNVGL-RP-F105 fatigue model and explore their implication to fatigue design and assessment. And it hopes to clarify why your free span has not failed even when you expected it to. free span VIV DNVGL-RP-F105 Proceedings...
Proceedings Papers

Proc. ASME. OMAE2021, Volume 4: Pipelines, Risers, and Subsea Systems, V004T04A039, June 21–30, 2021
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2021-63906
... verification includes riser sizing, adjacent riser interference, cathodic protection, dynamic strength analysis, Vortex-Induced Vibration (VIV) analysis, wave motion fatigue analysis, semi-submersible Vortex-Induced Motion (VIM) fatigue analysis, and riser installation. Sensitivity study was carried out...
Proceedings Papers

Proc. ASME. OMAE2021, Volume 8: CFD and FSI, V008T08A020, June 21–30, 2021
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2021-61830
... Abstract Vortex-induced vibration (VIV) is one of the most critical issues in deepwater developments due to its resultant fatigue damage to subsea structures such as risers, pipelines and jumpers. Although VIV effects on slender bodies have been comprehensively studied over decades, very few...
Proceedings Papers

Proc. ASME. OMAE2021, Volume 8: CFD and FSI, V008T08A024, June 21–30, 2021
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2021-62931
... Abstract This paper presents the experimental investigation of vortex-induced vibrations (VIV) of a flexibly mounted circular cylinder in combined current and wave flows. The same experimental setup has previously been used in our previous study (OMAE2020-18161) on VIV in regular waves...
Proceedings Papers

Proc. ASME. OMAE2021, Volume 4: Pipelines, Risers, and Subsea Systems, V004T04A028, June 21–30, 2021
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2021-63458
... intermediate supports to suppress VIV, since the latter proved not to be a long-term solution, (2) using partial rather than full strake coverage of spans and developing tools to quantify the level of strake coverage that is required, (3) improving estimates of soil stiffness and damping, and tools to handle...
Proceedings Papers

Proc. ASME. OMAE2021, Volume 2: Structures, Safety, and Reliability, V002T02A008, June 21–30, 2021
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2021-62568
... Abstract Risers are an integral part of an offshore oil and gas exploration structures, and that they are prone to vortex-induced vibration (VIV). Although several studies are conducted to analyze the VIV characteristics of risers, the results of amalgamation of multiple parameters and also...
Proceedings Papers

Proc. ASME. OMAE2020, Volume 8: CFD and FSI, V008T08A031, August 3–7, 2020
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2020-18759
... Abstract An empirical time-domain (TD) vortex-induced vibration (VIV) prediction model has been implemented in a software called VIVANA-TD based on its earlier development by Thorsen at NTNU. It models the synchronization of VIV loads and structural responses with a set of empirical parameters...
Proceedings Papers

Proc. ASME. OMAE2020, Volume 4: Pipelines, Risers, and Subsea Systems, V004T04A045, August 3–7, 2020
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2020-19024
... Abstract Recognizing the need to address the challenges associated with the VIV assessment of rigid jumpers, a joint industry project (JIP) was launched in December 2014. The JIP was based on the model test data supplied by ExxonMobil. Through the JIP study, measured responses from tow tests...
Proceedings Papers

Proc. ASME. OMAE2020, Volume 4: Pipelines, Risers, and Subsea Systems, V004T04A054, August 3–7, 2020
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2020-18382
... of 30 years and beyond. The fatigue assessment of the SCRs considers the damage contributions from the semi wave motions, riser Vortex-Induced Vibration (VIV) due to ambient current, and Vortex-Induced Motion (VIM) of a semi-submersible platform. Fatigue contribution from installation is also considered...
Proceedings Papers

Proc. ASME. OMAE2019, Volume 2: CFD and FSI, V002T08A028, June 9–14, 2019
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2019-95970
...), the in-line VIV response of partially strake-covered pipeline spans is calculated. It is found that as little as 10% strake coverage at the optimal location effectively suppresses pure in-line VIV. Further advantages of strakes rather than intermediate supports to suppress in-line VIV include: strakes...
Proceedings Papers

Proc. ASME. OMAE2019, Volume 2: CFD and FSI, V002T08A022, June 9–14, 2019
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2019-95522
... Abstract In deep sea oil exploitation, offshore platforms will move periodically in the water under the combined effects of waves, currents and winds. The relatively oscillatory flow is generated between the riser connected to the platform and the water. Vortex-induced Vibration (VIV) features...
Proceedings Papers

Proc. ASME. OMAE2019, Volume 5A: Pipelines, Risers, and Subsea Systems, V05AT04A035, June 9–14, 2019
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2019-96824
... simulation to get the vibration law of the corresponding feature points and compare it with the experimental results. The results indicate that the numerical analysis reasonably match with experimental results. flexible catenary risers mid-line buoyancy system VIV comparative experiment Study...
Proceedings Papers

Proc. ASME. OMAE2013, Volume 7: CFD and VIV, V007T08A014, June 9–14, 2013
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2013-10264
... Drag Crisis CFD FSI LES VIV This paper presents work using commercially available computational fluid dynamics (CFD) software that provides evidence of the effect that the drag crisis has on the dynamic response of a bluff object excited by vortex induced vibration (VIV) from normal...
Proceedings Papers

Proc. ASME. OMAE2013, Volume 4B: Pipeline and Riser Technology, V04BT04A017, June 9–14, 2013
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2013-11011
..., harmonic and modal finite element analysis with the VIV tool SHEAR7. The methodology is able to show generally improved VIV fatigue lives compared to more traditional methods based on DNV-RP-F105 because of the ability to define current loading over the jumper length and to assess the effects of strakes...
Proceedings Papers

Proc. ASME. OMAE2013, Volume 4B: Pipeline and Riser Technology, V04BT04A043, June 9–14, 2013
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2013-11417
... Subsea jumpers are susceptible to in-line and/or cross-flow vortex induced vibration (VIV) fatigue damage due to sea bottom currents. However, there is no proven industry standard design analysis methodology currently available specifically for assessing subsea jumper VIV response. In 2012...
Proceedings Papers

Proc. ASME. OMAE2011, Volume 3: Materials Technology; Jan Vugts Symposium on Design Methodology of Offshore Structures; Jo Pinkster Symposium on Second Order Wave Drift Forces on Floating Structures; Johan Wichers Symposium on Mooring of Floating Structures in Waves, 737-743, June 19–24, 2011
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2011-50233
... and refinery piping. Currently, there are limited guidelines specifically developed for vibration assessment for subsea piping. For subsea pipework, additional guidelines may be necessary to check for possible interaction between current induced VIV, wave induced VIV (for shallow waters) and slugging...