... Abstract An efficient methodology for estimating the extreme response of risers, e.g. Steel Catenary Risers (SCR) or Steel Lazy Wave Risers (SLWR), connected to deep water floaters with large hang-off motions is presented. The conventional approach is to estimate the appropriate level of long...

... induce significant high-frequency resonant and transient responses, e.g. springing and ringing, which greatly amplify the structural responses of the floating wind turbines. This study aims to predict the springing-induced extreme responses of the WindStar TLP system by using FAST__(Fatigue, Aerodynamics...

... ABSTRACT A novelty floating wind turbine concept, which utilizes a newly developed triple-column spar platform to support the NREL 5MW baseline wind turbine, is proposed in this research. A modified environmental counter method is proposed to estimate the long-term extreme response...

... shear split drilling equipment amplitude torsion twin pontoon type torsion split design wave amplitude maximum response longi dlp extreme response sectional force rao wave amplitude methodology 1 upstream oil & gas new methodology single dlp shear design wave wave period...

... condition co-linear condition interaction mooring system offshore subsea system simulation survival draft engineering basin ocean engineering basin hong exp amplitude basin extreme response An Experimental Study on Extreme Responses of a Moored Semi-submersible Rig Jin Ha Kim, Young Shik...

... sea state environmental load design criteria extreme response load effect contour riser steel riser statistics wave height sensitivity factor omission sensitivity factor return period environmental contour upstream oil & gas long-term response configuration contribution...

... angola block 17 offshore joint distribution subsea system artificial intelligence wind sea west africa application extreme response machine learning derivation probability contour distribution model Joint distributions of Wind/Waves/Current in West Africa and derivation of multivariate...

... ABSTRACT To standardize and simplify the design process, the designer wave and current loads are developed. The loads enables to calculate the extreme response of offshore structures under the given wave and current conditions by static analysis. Moreover, the intensity of loads can...

... ABSTRACT To standardize and simplify the design process of offshore structures, the designer wave load is developed. The load can accurately predict the extreme response of offshore structures by the static analysis under the realistic wave conditions. The designer wave load can be calculated...

... ABSTRACT In FPSO design, a rational structural strength assessment is required to ensure necessary integrity throughout planned service life. This paper presents a systematic method to predict extreme response and conduct fatigue assessment for FPSO structural analysis, in which the site...

..., has been developed to determine the extreme response and sensitivities of environmental input. The model includes the steady forcing effects due to current and wave interaction, wind and wave drift. The dynamic "effects include Morison type forces due to inertia and drag, spatially correlated wind...

... This paper introduces wave directionality into a joint environmental contour description that has been used previously in the study of extreme response behavior for uni-directional random seas. A modified cosine power-spreading model that accounts for the frequency dependence of the various...

... on the response and the forces they must withstand. To better understand the wave-induced behavior of this class of MOB, a 5-module, 1500 m structure has been analyzed. wet natural frequency wave angle interaction transfer function equation displacement connector load module extreme response...

... offshore environments. Recent statistical work has shown that "true" ocean spectra have as many as four peaks (Borgman 1993). significant wave height winterstein seastate tendon subsea system extreme response simulation environmental contour spectrum tlp tendon reliability estimate...

...Proceedings of the Fifth (1995) Interntltional Offshore and Polar Engineering Conference The Hague, The Netherlands,June 11-16, 1995 Copyright © 1995 by The International Society of Offshore and Polar Engineers ISBN 1-880653-16-8 (Set); ISBN 1-880653-17-6 (Vol 1) Extreme Response of Deep Water...

... for stochastic dynamic response analysis based on a finite element model of the gravity platform is outlined. Response maxima in each short-term stationary sea-state are fitted to Weibull three-parameter distributions estimated from simulated response time series. Comparison is made between extreme response...

... will significantly influence the extreme response and can not be modelled properly in a linear frequency domain analysis. A proper estimation of dynamic response of such structures therefore demands the application of a time domain analysis, refer Gudmestad et al.(1990), Kje0y et al.(1990), Leira et al.(1990...

... ABSTRACT A strategy for estimation of extreme response in flexible risers is proposed. In general, linear response methods cannot be used for extreme response estimation, since flexible risers are exposed to nonlinear drag loading from ocean waves. Hence, the response is generally non-Gaussian...

... to forces at frequencies outside the range of the wave spectrum. extreme response formula expression offshore structure artificial intelligence ness assumption dynamic model naess sum-frequency response prediction equation procedure gaussian process denote extreme value estimate...

... values to be used in this study are based on preliminary values. To investigate the practical influence of sum-frequency effects on tether fatigue and extreme response a case study was set up. The computational procedures to be applied to the case study has been developed by Aker Engineering. The first...