Extreme dynamic, non-linear response of fixed platforms using a complete long-term approach

Long-term performance assessment and design of offshore structures

“…For example, the environmental parameter values at the mean of each discretized subcopula's subdomains is used in the numerical computation, that is, a point value of x 1 þx 2 2 ; y 1 þy 2 2 À Á for the subcopula C 0 shown in Eq. (18). This is similar in concept to the sea state block method.…”

“…Approaches to answer these two challenges include the use of efficient numerical methods and model test [1,5], reduction in simulation efforts by selecting the critical sea states [41], use of environmental contour and inverse first order reliability method (IFORM) [49,28], and use of bootstrap methods in deriving the confidence interval from the structural analysis [15]. These studies also assessed various types of structures with regards to long term performance, such as jacket structures [18], jackup rigs [39] as well as floating structures [56]. It was recognized that the long term assessment remains one of the most difficult tasks, and the statistical modeling of the ocean http://dx.doi.org/10.1016/j.compstruc.2015.02.029 0045-7949/Ó 2015 Elsevier Ltd. All rights reserved.…”

Assessment of Methods for Short-Term Extreme Value Analysis of Riser Collision

“…The constants u, β and λ can be determined by applying moment estimator according to Farnes and Moan [9] based on experience. The detail of the moment estimator can found in Appendix A.…”

Reliability-based comparative study for mooring lines design criteria

“…According to this methodology, the characterization of long-term extreme sea state parameters can be obtained on the basis of the short-term environmental parameter statistics. It is also possible to establish the long-term response statistics of a structural system based on its response in individual short-term sea states and short-term environmental parameter statistics [2,3].…”