Joint Probability of Extreme Waves and Currents on Norwegian Shelf

Heideman, John C.; Hagen, Øistein; Cooper, Cortis; Dahl, Finn-Erik

doi:10.1061/(asce)0733-950x(1989)115:4(534)

Cited by 12 publications

(5 citation statements)

References 2 publications

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“…Gordon et al [7], Heideman et al [8], Forristall et al [6] and Prior-Jones and Beiboer [9] have summarised much of the literature on the joint probability of environmental variables, particularly wind, wave and current. Studies for waters off Europe, USA and Australia suggest that accounting for joint probability in the specification of environmental conditions reduces design loads on drag dominated structures by 10 to 40%.…”

Section: Joint Met-ocean or Response Based Design Conditionsmentioning

confidence: 99%

Response Based Design Conditions in the North Sea: Application of a New Method

Tromans

Vanderschuren

1995

All Days

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The estimation of rare, extreme environments from a relatively short oceanographic database is crucial to the calculation of loads and responses of offshore structures. A novel and consistent approach has been developed that makes use of a number of asymptotic properties of extremes. A storm can be adequately characterised by its most probable extreme wave or the resultant structural response. This allows us to treat storms, rather than sea states, as the essential random, independent events; to account correctly for uncertainty in the largest wave and structural response within a storm; and to deal with the uncertainty in the seventy of randomly arriving storms, including the rare storms that are more severe than those in the database. The method provides the long term load statistics essential to reliability analysis and to the calibration of environmental Ioad factors in design codes.We demonstrate the application of the method to the prediction of extreme waves, loads and "response based" environmental design conditions for a drag dominated structure in the North Sea.

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Section: Joint Met-ocean or Response Based Design Conditionsmentioning

confidence: 99%

Response Based Design Conditions in the North Sea: Application of a New Method

Tromans

Vanderschuren

1995

All Days

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“…There are few available studies of the joint probability of waves and currents in the surface of the water column, probably due to the lack of simultaneous measured wave and current data and the complicated, far from fully understood, wave-current interaction mechanisms. However, based on simultaneous wave and current measurements at Tromsøflaket, both Gordon, Dahl [29] and Heideman, Hagen [30] investigated the relationship of extreme waves and currents and established very simplified joint distributions to be used in design and load calculations for offshore structures. Wen and Banon [31] developed a probabilistic methodology that lead to joint probability distributions of hurricane induced winds, waves and currents at a generic site in the Gulf of Mexico.…”

Section: Introductionmentioning

confidence: 99%

Waves and associated currents–experiences from 5 years metocean measurements in the northern North Sea

Bruserud

Haver

2019

Marine Structures

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“…Joint modelling of offshore environmental processes has evolved over the years to facilitate probabilistic analysis of structures. Early adoptions include a bottomfixed structure accounting for wave height and current [7]. A comprehensive omni-directional model including wind, wave, current and tidal elevation can be found in e.g.…”

Section: Introductionmentioning

confidence: 99%

A new combination of conditional environmental distributions

Horn

Bitner‐Gregersen

Krokstad

et al. 2018

Applied Ocean Research

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In this paper, a joint distribution of all relevant environmental parameters used in design of offshore structures including directional components is presented, along with a novel procedure for dependency modelling between wind and wind sea. Probabilistic directional models are rarely used for response calculation and reliability assessments of stationary offshore structures. However, very few locations have the same environment from all compass directions in combination with a rotationally symmetric structure. The scope of this work is to present a general environmental joint distribution with directional descriptions for long term design of stationary offshore structures such as offshore wind turbines. Wind, wind sea and swell parameters will be investigated for a chosen location in the central North Sea.

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Joint Probability of Extreme Waves and Currents on Norwegian Shelf

Cited by 12 publications

References 2 publications

Response Based Design Conditions in the North Sea: Application of a New Method

Response Based Design Conditions in the North Sea: Application of a New Method

Waves and associated currents–experiences from 5 years metocean measurements in the northern North Sea

A new combination of conditional environmental distributions

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