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Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review
Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review
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TY - GEN
T1 - On environmental contours for marine and coastal design
AU - Ross, E.
AU - Randell, D.
AU - Astrup, O.C.
AU - Bitner-Gregersen, E.
AU - Vanem, E.
AU - Bunn, N.
AU - Gouldby, B.
AU - Liu, Y.
AU - Feld, G.
AU - Huseby, A.
AU - Jonathan, Philip
PY - 2019/11/1
Y1 - 2019/11/1
N2 - Environmental contours are used in structural reliability analysis of marine and coastal structures as an approximate means to locate the boundary of the distribution of environmental variables, and to identify environmental conditions giving rise to extreme structural loads and responses. There are different approaches to estimating environmental contours, some directly linked to methods of structural reliability. Each contouring approach has its pros and cons. Although procedures for applying contours in design have been reported in articles and standards, there is still ambiguity about detail, and the practitioner has considerable flexibility in applying contours. It is not always clear how to estimate environmental contours well. Over four years, DNV-GL, Shell, the University of Oslo and HR Walling-ford worked together to review current practice regarding the use of design contours. In this paper, we present a summary of our findings. We overview the motivations for different approaches to contours, and their resulting characteristics. Using different marine applications, we also explore the various sources of uncertainty present, their impact on contour estimates and the estimation of extreme environmental loads and responses.
AB - Environmental contours are used in structural reliability analysis of marine and coastal structures as an approximate means to locate the boundary of the distribution of environmental variables, and to identify environmental conditions giving rise to extreme structural loads and responses. There are different approaches to estimating environmental contours, some directly linked to methods of structural reliability. Each contouring approach has its pros and cons. Although procedures for applying contours in design have been reported in articles and standards, there is still ambiguity about detail, and the practitioner has considerable flexibility in applying contours. It is not always clear how to estimate environmental contours well. Over four years, DNV-GL, Shell, the University of Oslo and HR Walling-ford worked together to review current practice regarding the use of design contours. In this paper, we present a summary of our findings. We overview the motivations for different approaches to contours, and their resulting characteristics. Using different marine applications, we also explore the various sources of uncertainty present, their impact on contour estimates and the estimation of extreme environmental loads and responses.
U2 - 10.1115/OMAE2019-96587
DO - 10.1115/OMAE2019-96587
M3 - Conference contribution/Paper
SN - 9780791858851
VL - 7B
BT - Proceedings of the 38th International Conference on Ocean, Offshore & Arctic Engineering
PB - ASME
T2 - 38th International Conference on Ocean, Offshore & Arctic Engineering
Y2 - 9 June 2019 through 14 June 2019
ER -