DNV SESAM 2013

Description

Sesam GeniE software The Sesam GeniE software is a software tool for designing and analyzing offshore and maritime structures made of beams and plates. Modelling, analysis and results processing are performed in the same graphical user interface. The use of concept technology makes the Sesam GeniE software highly efficient for integrating stability, loading, strength assessment and CAD exchange. All data are persistent enabling the engineers to do efficient iterative re-design of a structure. Sesam GeniE software for: Fixed structures The analysis – hydrodynamic as well as strength calculations – and evaluation of results are done within the Sesam GeniE software. The software is built for frequent changes in both structural and equipment layout – any modification performed on a concept level will give an automatic updated and consistent analysis model. For fixed platforms, the Sesam GeniE software can perform static and dynamic linear analysis for structures subjected to wave, wind, current and the equipment layout. It is also possible to include the effects from non-linear pile/soil behaviour. Code compliance of beams may be performed according to API/AISC, API/LRFD, Norsok/Eurocode or ISO (19902). The results may be reported graphically or by using standard report layouts that can be customized (supporting MS Office). Similarly, for plated structures (stiffened as well as un-stiffened) they may be checked against codes like DNV (RP C201.1) and API(2U). The wind and wave loads create input to fatigue assessments that can be based on a deterministic or stochastic aproach using automatic parametric SCF's according to Kuang, Lloyds and Efthymiou. The analyses may also be performed based on user defined SCF from local analysis. It is also possible to performe progressive collapse analysis considering the effect of residual strength in the structure. To efficiently perform the various tasks within design, installation and operation of fixed platforms, the Sesam GeniE software uses the functionality provided by other Sesam software tools as described below. Sesam DeepC is a tool for mooring and riser design as well marine operations of offshore floating structures. It will perform mooring analysis separately or when including the coupled effects from risers and vessels. Furthermore, Sesam DeepC may be used for riser design where the risers are analyzed separately or when considering coupling effects. Marine operations may be simulated in the time domain for a study of motions and station keeping of multibody systems. For deep water installations, the riser and mooring systems greatly influence the motions of the floater. The floater and slender structures constitute an integrated dynamic system responding to the environmental loading. Because coupling effects are consistently treated, there is no need for the engineers to make assumptions about the damping level (updated for each time step) which is crucial in a non-linear analysis accounting for slender structure restoring, damping and inertia forces. In other words, Sesam DeepC will increase the confidence level of riser and mooring analysis.

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