Carlos Michelen and Ryan Coe recently published results from research comparing various methods for producing short-term (i.e. sea-state specific) extreme response distributions. These methods are needed to statistically quantify the extreme response (e.g., tension in the mooring line of a wave energy converter) based on modeling results. (Note that these results might be obtained using either a physical or numerical model.) The range of methods available to perform this task balance the amount of data required against the relevance of that data with respect to the extreme response. The comparison showed that the methods considered produce widely varying results; the researchers suggest that the Weibull-tail-fitting method offers an attractive combination of efficiency and performance.
C. Michelen, R. Coe, Comparison of methods for estimating short-term extreme response of wave energy converters, in: OCEANS, IEEE, Washington, D.C., 2015.