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Keywords: fatigue damage
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Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 2020
Paper Number: OTC-30814-MS
... performance interaction critical location cross-section slender offshore structure upstream oil & gas offshore structure drag coefficient mooring system fatigue damage DNV GL . DNVGL-RP-C203 . Fatigue Design of Offshore Steel Structure, December 2019 . Vijayaraghavan , V...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 2020
Paper Number: OTC-30635-MS
... updates of accumulated fatigue damage and remaining service life. This enables the operating company to build contextualized and high value dashboards presented on their organizational front end. The paper illustrates the power and applicability of combining modern numerical methods with digital...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 2019
Paper Number: OTC-29463-MS
... through two practical problems that reflect typical design analyses of OWTs: the first example shows a fatigue damage assessment for a monopile, and the second considers an extreme load event for a suction bucket jacket. The structural response is computed using the REDWIN foundation models and compared...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 2019
Paper Number: OTC-29553-MS
... steel catenary riser (SCR) is a cost-effective solution in deepwater projects. One of the critical design aspects for a SCR is the fatigue assessment in the vicinity of the touch down point (TDP)/touch down zone (TDZ). The fatigue damage near the TDZs is significantly influenced by the riser- seabed...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 2019
Paper Number: OTC-29596-MS
.... fatigue damage fatigue life requirement spread moored fpso upstream oil & gas gamma value inch scr sensitivity scr contribution inch production offshore technology conference class curve riser design challenge subject touchdown region Presentation of OTC-29596-MS Presentation of...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 2019
Paper Number: OTC-29608-MS
... used in the assessment of fatigue damage to the risers. The assessment considers the fatigue damage contributions from Spar wave motion, riser VIV and Spar VIM. DNV B and C/2 curves (1984) are used for riser base material and welding respectively. Wave fatigue analysis is based on the wave scatter...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 2019
Paper Number: OTC-29239-MS
... SCR is often used a generic term to describe both the regular SCR as well as the lazy wave implementation of it, the SLWR. fatigue damage scr offshore technology conference riser higher harmonic viv coefficient frequency logger fatigue damage rate reliability viv event upstream oil...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 2019
Paper Number: OTC-29460-MS
... Bandara , C. S. , Siriwardane , S. C. , Dissanayake , U. I. , & Dissanayake , R. ( 2015 ). Developing a full range S-N curve and estimating cumulative fatigue damage of steel elements . Computational Materials Science , 96 , 96 – 101 . Lai , M. T...
Proceedings Papers

Paper presented at the Offshore Technology Conference, April 30–May 3, 2018
Paper Number: OTC-29060-MS
...). The riser maximum stress at the hang-off can be lower when the wave particle motion is considered in the dynamic simulation compared with using vessel motion time trace only. The TDZ fatigue damage is observed to be lower when background current is applied along riser in the motion fatigue analysis...
Proceedings Papers

Paper presented at the Offshore Technology Conference, April 30–May 3, 2018
Paper Number: OTC-28674-MS
..., Recovery and Transfer Challenges . Presented at Offshore Technology Conference , Houston , 03-06 May . OTC-20650-MS . slwr fatigue life linear weight buoyancy tow fatigue damage offshore technology conference installation upstream oil & gas fatigue result tow speed tow route...
Proceedings Papers

Paper presented at the Offshore Technology Conference, April 30–May 3, 2018
Paper Number: OTC-28653-MS
... introduced, and it has been a standard design practice to evaluate potential fatigue damage of slender frame structures due to vibrations induced by vortex shedding, as well as buffeting loads due to gusting. This is, however, not yet standard design practice for land-based slender frame structures despite...
Proceedings Papers

Paper presented at the Offshore Technology Conference, April 30–May 3, 2018
Paper Number: OTC-28673-MS
... recorded hurricane events had not significantly reduced the structural capacity or the facility fitness for service. Hurricane driven locations had long remaining lives. Uniformly the extent of fatigue damage calculated by rainflow analysis was a factor lower than that initial calculated with spectral...
Proceedings Papers

Paper presented at the Offshore Technology Conference, April 30–May 3, 2018
Paper Number: OTC-28732-MS
... predictions are compared against the fatigue damage calculated from finite element analysis data. drilling riser fatigue damage rate integrity management machine learning upstream oil & gas fatigue damage algorithm vessel motion neural network virtual sensor seastate riser ann model...
Proceedings Papers

Paper presented at the Offshore Technology Conference, April 30–May 3, 2018
Paper Number: OTC-28747-MS
... frequency domain based finite element analysis (FEA) approach/design-tool to calculate the fatigue damage of piping systems due to FIV or AIV. For a FIV analysis, the two key steps that can be identified in this approach are: (1) the development of a transfer function, and (2) the generation of a pressure...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 2017
Paper Number: OTC-27562-MS
... measured and combined with a model of the riser/BOP/wellhead/casing system to reconstruct fatigue damage in the wellhead, conductor and surface casing. To measure wellhead motions, Subsea Vibration Data Loggers (SVDLs) were run with the riser and retrieved via Remotely Operated Vehicle (ROV). Fatigue...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 2017
Paper Number: OTC-27597-MS
... can continue to operate reliably. Since touchdown point fatigue damage is a strong factor determining the service life of an SCR, strategies to mitigate fatigue damage in this region may be required for service life extension. One such strategy commonly adopted is platform relocation in order to shift...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 2017
Paper Number: OTC-27584-MS
... cause cyclical bending moments and Wellhead fatigue degradation. The intention of Reactive Flex-Joint (RFJ) is to lower the fatigue damage by reducing cyclical bending moment, which is a main contributor for Wellhead fatigue. It's was built a technology demonstrator (scale 1:25) in 2006 and patent of...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 2017
Paper Number: OTC-27627-MS
... successfully performed using soils from the Gulf of Mexico (GoM) and offshore Angola. Past studies have demonstrated that fatigue damage in a full-scale SCR at touchdown zone can accurately be modeled using a scaled sectional SCR in a geotechnical centrifuge. The centrifuge results were compared to finite...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 2017
Paper Number: OTC-27692-MS
... modules. Significant reduction in VIV response has multiple benefits: less drag, reduced fatigue damage, and an increase in maximum currents drilling risers can be operated in - without any moving parts or extra deployment installation time. High Reynolds Number model testing results showed LGS technology...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 2017
Paper Number: OTC-27754-MS
... estimation of these scenarios, particularly on riser loads. Fatigue damage to the subsea wellhead is also included to examine the significance and effect of the loads from each of the loading scenarios. Dynamic loading scenarios in drilling and production phases are evaluated in the paper. In the drilling...

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