A new approach to environmental contours for ocean engineering applications based on direct Monte Carlo simulations

Huseby, Arne Bang; Vanem, Erik; Natvig, Bent

doi:10.1016/j.oceaneng.2012.12.034

Cited by 111 publications

(94 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…B + is the surface delineated by the tangent to the contour which does not contain the convex surface B. The tangent is a linear approximation of the true limit state function (Huseby et al, 2013).…”

Section: Defining the Multivariate Scenarios 321 Joint Exceedance Cmentioning

confidence: 99%

“…Huseby et al, 2013Huseby et al, , 2015Jonathan and Ewans, 2013). These contours are defined within the input variables space but are based on the probability of exceedance of the response variable.…”

Section: Environmental Contourmentioning

confidence: 99%

“…A classical way of defining such environmental contours is to use the inverse firstorder reliability method (iFORM) (Winterstein et al, 1993). Here we preferred to use the approach developed by Huseby et al (2013Huseby et al ( , 2015 as it overcomes some limitations of the iFORM and it is especially suited to Monte Carlo simulated datasets. An environmental contour defined in this way is an (x, y) contour in the space (SWL, H s ), outlining a convex inner surface.…”

Section: Environmental Contourmentioning

confidence: 99%

“…In the related field of structural engineering (design of coastal defences, offshore renewable energy systems, etc. ), it is usual to refer to the environmental contour concept in conjunction with the inverse first-order reliability method (iFORM) (Winterstein et al, 1993;Jonathan and Ewans, 2013;Huseby et al, 2013Huseby et al, , 2015. Such an approach focuses on extreme system responses rather than on the combinations of extreme environmental loads.…”

mentioning

confidence: 99%

See 3 more Smart Citations

High-resolution marine flood modelling coupling overflow and overtopping processes: framing the hazard based on historical and statistical approaches

Lerma¹,

Bulteau²,

Elineau³

et al. 2018

Nat. Hazards Earth Syst. Sci.

View full text Add to dashboard Cite

Abstract. A modelling chain was implemented in order to propose a realistic appraisal of the risk in coastal areas affected by overflowing as well as overtopping processes. Simulations are performed through a nested downscaling strategy from regional to local scale at high spatial resolution with explicit buildings, urban structures such as sea front walls and hydraulic structures liable to affect the propagation of water in urban areas. Validation of the model performance is based on hard and soft available data analysis and conversion of qualitative to quantitative information to reconstruct the area affected by flooding and the succession of events during two recent storms. Two joint probability approaches (joint exceedance contour and environmental contour) are used to define 100-year offshore conditions scenarios and to investigate the flood response to each scenario in terms of (1) maximum spatial extent of flooded areas, (2) volumes of water propagation inland and (3) water level in flooded areas. Scenarios of sea level rise are also considered in order to evaluate the potential hazard evolution. Our simulations show that for a maximising 100-year hazard scenario, for the municipality as a whole, 38 % of the affected zones are prone to overflow flooding and 62 % to flooding by propagation of overtopping water volume along the seafront. Results also reveal that for the two kinds of statistic scenarios a difference of about 5 % in the forcing conditions (water level, wave height and period) can produce significant differences in terms of flooding like +13.5 % of water volumes propagating inland or +11.3 % of affected surfaces. In some areas, flood response appears to be very sensitive to the chosen scenario with differences of 0.3 to 0.5 m in water level. The developed approach enables one to frame the 100-year hazard and to characterize spatially the robustness or the uncertainty over the results. Considering a 100-year scenario with mean sea level rise (0.6 m), hazard characteristics are dramatically changed with an evolution of the overtopping / overflowing process ratio and an increase of a factor 4.84 in volumes of water propagating inland and 3.47 in flooded surfaces.

show abstract

Section: Defining the Multivariate Scenarios 321 Joint Exceedance Cmentioning

confidence: 99%

Section: Environmental Contourmentioning

confidence: 99%

Section: Environmental Contourmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

High-resolution marine flood modelling coupling overflow and overtopping processes: framing the hazard based on historical and statistical approaches

Lerma¹,

Bulteau²,

Elineau³

et al. 2018

Nat. Hazards Earth Syst. Sci.

View full text Add to dashboard Cite

show abstract

“…Alternative transformations, such as a Nataf transformation, have also been utilized [44]. Huseby et al [45] introduced a second class of methods for extrapolating extreme sea states, which rely on Monte Carlo simulation of sea states based on a joint probability model. Vanem and Bitner-Gregersen [46] provided a useful comparison of these two approaches, both in terms of methodology and performance.…”

Section: Environmental Characterizationmentioning

confidence: 99%

A Survey of WEC Reliability, Survival and Design Practices

Coe

Rij

2017

Energies

View full text Add to dashboard Cite

A wave energy converter must be designed to survive and function efficiently, often in highly energetic ocean environments. This represents a challenging engineering problem, comprising systematic failure mode analysis, environmental characterization, modeling, experimental testing, fatigue and extreme response analysis. While, when compared with other ocean systems such as ships and offshore platforms, there is relatively little experience in wave energy converter design, a great deal of recent work has been done within these various areas. This paper summarizes the general stages and workflow for wave energy converter design, relying on supporting articles to provide insight. By surveying published work on wave energy converter survival and design response analyses, this paper seeks to provide the reader with an understanding of the different components of this process and the range of methodologies that can be brought to bear. In this way, the reader is provided with a large set of tools to perform design response analyses on wave energy converters.

show abstract

Environmental contours for circular‐linear variables based on the direct sampling method

2019

Self Cite

View full text Add to dashboard Cite

Environmental contours are often used in the design of engineering structures to identify extreme environmental conditions that may give rise to extreme loads and responses. The perhaps most common application of environmental contours is for wave climate variables such as significant wave height and wave period. However, for the design of wind energy installations, the joint distribution of wind speed and wind direction may be equally important. In this case, joint modelling of linear (wind speed) and circular (wind direction) variables are needed, and methods for establishing environmental contours for circular-linear variables will be required.In this paper, different ways of establishing environmental contours for circular-linear variables will be presented and applied to a joint distribution model for wind speed and wind direction.In particular, the direct sampling approach to environmental contours will be modified to the case where one of the variables is cyclic. In addition, contours based on exceedance planes in polar coordinates will be established, and circular-linear contours will also be calculated based on the inverse FORM (I-FORM) approach.

show abstract

A new approach to environmental contours for ocean engineering applications based on direct Monte Carlo simulations

Cited by 111 publications

References 17 publications

High-resolution marine flood modelling coupling overflow and overtopping processes: framing the hazard based on historical and statistical approaches

High-resolution marine flood modelling coupling overflow and overtopping processes: framing the hazard based on historical and statistical approaches

A Survey of WEC Reliability, Survival and Design Practices

Environmental contours for circular‐linear variables based on the direct sampling method

Contact Info

Product

Resources

About