Home > Research > Publications & Outputs > The effect of directionality on extreme wave de...

Links

Text available via DOI:

View graph of relations

The effect of directionality on extreme wave design criteria

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Published

Standard

The effect of directionality on extreme wave design criteria. / Jonathan, P.; Ewans, K.
In: Ocean Engineering, Vol. 34, No. 14-15, 2007, p. 1977-1994.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Harvard

APA

Vancouver

Jonathan P, Ewans K. The effect of directionality on extreme wave design criteria. Ocean Engineering. 2007;34(14-15):1977-1994. doi: 10.1016/j.oceaneng.2007.03.003

Author

Jonathan, P. ; Ewans, K. / The effect of directionality on extreme wave design criteria. In: Ocean Engineering. 2007 ; Vol. 34, No. 14-15. pp. 1977-1994.

Bibtex

@article{961ddc10062b48cba5864fb446a814f7,
title = "The effect of directionality on extreme wave design criteria",
abstract = "Sea state design criteria for offshore facilities are frequently provided by direction. For example, it is typical for return-period values of the significant wave height to be specified for each of eight 45° sectors in addition to the omni-directional case. However, it is important that these criteria be consistent so that the probability of exceedance of a given wave height from any direction derived from the directional values is the same as for the omni-directional value. As recently demonstrated by Forristall it is not sufficient simply to scale the directional values so that the value of the wave height from the most severe sector is the same as the omni-directional value. We develop an approach for establishing appropriate directional criteria and an associated omni-directional criterion for a specific location. The inherent directionality of sea states is used to develop a model for the directional dependence of distributions of storm maxima. The directional model is applied to the GOMOS data, and the distributional properties of the 100-year significant wave height are estimated and the implications for design discussed. An objective risk-cost approach is proposed for optimising directional criteria, while preserving overall reliability. Simulation studies are performed, using realistic extreme value assumptions, to quantify the uncertainties. {\textcopyright} 2007 Elsevier Ltd. All rights reserved.",
keywords = "Design, Extreme, Gulf of Mexico, Hurricane, Risk, Wave direction, Wave height, Extreme wave design crieria, Offshore facilities, Computer simulation, Mathematical models, Probability, Reliability theory, Seawater, Water waves, sea state, significant wave height, storm surge, wave direction, wave modeling, Atlantic Ocean",
author = "P. Jonathan and K. Ewans",
year = "2007",
doi = "10.1016/j.oceaneng.2007.03.003",
language = "English",
volume = "34",
pages = "1977--1994",
journal = "Ocean Engineering",
issn = "0029-8018",
publisher = "Elsevier Ltd",
number = "14-15",

}

RIS

TY - JOUR

T1 - The effect of directionality on extreme wave design criteria

AU - Jonathan, P.

AU - Ewans, K.

PY - 2007

Y1 - 2007

N2 - Sea state design criteria for offshore facilities are frequently provided by direction. For example, it is typical for return-period values of the significant wave height to be specified for each of eight 45° sectors in addition to the omni-directional case. However, it is important that these criteria be consistent so that the probability of exceedance of a given wave height from any direction derived from the directional values is the same as for the omni-directional value. As recently demonstrated by Forristall it is not sufficient simply to scale the directional values so that the value of the wave height from the most severe sector is the same as the omni-directional value. We develop an approach for establishing appropriate directional criteria and an associated omni-directional criterion for a specific location. The inherent directionality of sea states is used to develop a model for the directional dependence of distributions of storm maxima. The directional model is applied to the GOMOS data, and the distributional properties of the 100-year significant wave height are estimated and the implications for design discussed. An objective risk-cost approach is proposed for optimising directional criteria, while preserving overall reliability. Simulation studies are performed, using realistic extreme value assumptions, to quantify the uncertainties. © 2007 Elsevier Ltd. All rights reserved.

AB - Sea state design criteria for offshore facilities are frequently provided by direction. For example, it is typical for return-period values of the significant wave height to be specified for each of eight 45° sectors in addition to the omni-directional case. However, it is important that these criteria be consistent so that the probability of exceedance of a given wave height from any direction derived from the directional values is the same as for the omni-directional value. As recently demonstrated by Forristall it is not sufficient simply to scale the directional values so that the value of the wave height from the most severe sector is the same as the omni-directional value. We develop an approach for establishing appropriate directional criteria and an associated omni-directional criterion for a specific location. The inherent directionality of sea states is used to develop a model for the directional dependence of distributions of storm maxima. The directional model is applied to the GOMOS data, and the distributional properties of the 100-year significant wave height are estimated and the implications for design discussed. An objective risk-cost approach is proposed for optimising directional criteria, while preserving overall reliability. Simulation studies are performed, using realistic extreme value assumptions, to quantify the uncertainties. © 2007 Elsevier Ltd. All rights reserved.

KW - Design

KW - Extreme

KW - Gulf of Mexico

KW - Hurricane

KW - Risk

KW - Wave direction

KW - Wave height

KW - Extreme wave design crieria

KW - Offshore facilities

KW - Computer simulation

KW - Mathematical models

KW - Probability

KW - Reliability theory

KW - Seawater

KW - Water waves

KW - sea state

KW - significant wave height

KW - storm surge

KW - wave direction

KW - wave modeling

KW - Atlantic Ocean

U2 - 10.1016/j.oceaneng.2007.03.003

DO - 10.1016/j.oceaneng.2007.03.003

M3 - Journal article

VL - 34

SP - 1977

EP - 1994

JO - Ocean Engineering

JF - Ocean Engineering

SN - 0029-8018

IS - 14-15

ER -