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Keywords: return period
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Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 1–4, 2023
Paper Number: OTC-32195-MS
... technical challenges given its features, including grouted connections, Tuned Liquid Damper (TLD) and the prospect of Wave-in-Deck (WID) in higher return period environmental events. This paper presents a life extension case study for this facility by exploring the overall life extension process and how...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, August 16–19, 2021
Paper Number: OTC-30940-MS
... and beach were estimated based on the general coastal transects. Return period assessment Low return periods (< 10 yr) are mostly studied to assess the validity of the model against observed sea level data at Grand Isle and Port Fourchon. As these two requirements oppose each other, the result...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, April 30–May 3, 2018
Paper Number: OTC-28850-MS
... Stability Analyses The stability of the rock mass shall be assessed for all relevant return period of the seismic action. A fair number of scenarios shall be considered in order to capture the seismic hazard of a given area. The following set of return periods is recommended: 100 yrs, 475 yrs, 2475 yrs...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, April 30–May 3, 2018
Paper Number: OTC-29024-MS
... of weak point analysis. The objective was to determine the probable failure mode of the mooring system, to aid the risk assessment and mitigation strategies at the design stage. In the offshore industry, it is now a common practice to check critical mooring design to a longer return period than...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 1–4, 2017
Paper Number: OTC-27734-MS
... & gas gulf significant wave height return period mexico Mathisen , J. , Okkenhaug , S. , Larsen , K. , ( 2011 ), " On the Probability Distribution of Mooring Line Tensions in a Directional Environment ," OMAE2011-50104, ASME , Rotterdam . Okkenhaug , S. , Mathisen...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 1–4, 2017
Paper Number: OTC-27773-MS
... Yes * 100-year return period for one environmental parameter (wave, wind or current) and associated values for the other two. 10-year return period for one environmental parameter (wave, wind or current) and associated values for the other two.Note that for mobile units 5 year is accepted when...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 1–4, 2017
Paper Number: OTC-27640-MS
... 2MET. crest conundrum upstream oil & gas water depth crest elevation simulation negative conundrum correction n-year wave wave height guidance design wave approach conundrum stream function wave n-year crest loading return period crest wave period design wave...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 1–4, 2017
Paper Number: OTC-27520-MS
... Abstract Extreme N-year current profiles for Loop Current and Eddies (LCE) are required for the strength and fatigue assessment of the risers and wellhead/casing systems. The profiles for different return periods (i.e., N = 1, 10, 100, etc.) are derived from an extreme value analysis (EVA...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 1–4, 2017
Paper Number: OTC-27699-MS
... Abstract This paper outlines a methodology for developing consistent robustness criteria; accounting for multiple hazards that may occur during long Return Period (RP) events, and accounting for other degradation mechanisms unrelated to long RP events but, based on experience, were root causes...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 1–4, 2017
Paper Number: OTC-27697-MS
... through two sides, i.e. better design standards and more rigorous operation practices. On the design side, there appears to be a lack of clear guidance on designing a mobile mooring system to a proper return period. The gap is prominent especially for moorings in tropical cyclone (aka hurricane or typhoon...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 1–4, 2017
Paper Number: OTC-27870-MS
... or conservatism as the renewable industry moves forward with the installation of offshore energy converters. anchor mec consequence class ocean energy tidal current offshore technology conference oil and gas renewable energy selection return period application installation requirement anchor...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 2–5, 2016
Paper Number: OTC-27089-MS
... by wind and central pressure values. From these historical databases wind and wave maxima are subjected to extrapolation in logarithmic space. In order to correctly evaluate the required return period (up to 1 on 10,000 years) extrapolating the tail of the distribution from historical database provides...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 2–5, 2016
Paper Number: OTC-27213-MS
...-2 and the more recent API adoption, RP2EQ, provide performance-based recommendations for selection of a two-level seismic design. At the first level the structure is designed to retain its full capacity (and likely its operability) at ground motions with a return period typically under 200 years...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 4–7, 2015
Paper Number: OTC-26035-MS
... of design criteria, including environmental conditions return period (and other parameters) as well as safety factors for WEC moorings has not yet evolved into a standard procedure. This paper contrasts the mooring system characteristics that are found for some typical WEC moorings when their design...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 5–8, 2014
Paper Number: OTC-25108-MS
... are selected based on Gulf of Mexico projects. By estimating the response of the mooring system based on limited dynamic analysis for various return periods and loading directions, a regression model is used to develop the probability distribution of the conditional probabilities of failure under each return...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 5–8, 2014
Paper Number: OTC-25160-MS
..., and a probabilistic model for evaluating the runout of the released mass gravity flow. Using these models, the probability of a mass gravity flow impacting the seafloor installation(s) should then be computed for all relevant scenarios and return periods in order to derive the annual or lifetime probability. However...
Proceedings Papers
Masanori Kyo, Yasuyuki Yamazaki, Puneet Agarwal, Scot Mcneill, Kan Aoike, Eigo Miyazaki, Tomokazu Saruhashi, Ikuo Sawada
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 6–9, 2013
Paper Number: OTC-24024-MS
... the Kuroshio current that flows through this site with relatively high speeds. Such strong currents can cause fatigue damage of the drilling riser due to vortex-induced-vibrations. pod mode drilling riser scatter diagram return period extreme current profile current profile upstream oil & gas...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, April 30–May 3, 2012
Paper Number: OTC-23202-MS
... and geothermal industries. otc 23202 drilling riser configuration drilling project mantle mud weight technology conference drilling upstream oil & gas drilling operation water depth marine drilling riser return period crust iodp drilling riser upper mantle configuration riser...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, April 30–May 3, 2012
Paper Number: OTC-23440-MS
... return period floating production system fpso platform design offshore technology conference life safety limit state hurricane offshore facility upstream oil & gas requirement design practice performance expectation hazard curve loading subsea system safety design condition...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, April 30–May 3, 2012
Paper Number: OTC-23406-MS
... site conditionsin the Gulf of Mexico as well as the Mid-Atlantic and South Atlantic sectionsof the US East Coast are considered. Parametric study of the correlations between the responses of turbine supportstructures and the main design parameters including return period of designenvironmental...
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