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For 13 years, SBM has been using Sesam products, a timespan during which demands on both classification and the software have grown. An example is the comparison of a fixed tower to a tower on a vessel. The rotational accelerations are magnified by the height of the tower.
As taller towers become the norm, the calculated forces are greater and more variable. A tower on a fixed structure will have eight load cases.
For the FPSO tower, there will be load cases, and sometimes there will be a need for three or four drafts. You have to just do them all, and do the summary. The use of Sesam for fixed structures has evolved during the years, as it was originally purchased by SBM for fatigue check of flare towers and strength code check of beams especially.
GeniE is still being used for this, in addition to its use on de of topsides. The demands of class have changed since Bakker started using the program more than a decade ago. It used to be that you could model only the beams — now we model half the vessel.
Bakker is more used to using scripting that is built in the software, JScript. That way he personalises the input, and gains tight control of things such as naming elements. A strength of Sesam is the naming.
It makes them easier to distinguish from each other. A lot of people forget that requirement because of the nice interface. Some companies have just one or two key developers, and if they retire, the users are left in a bind.
I think the continuity of the development team at DNV is very important. SBM has found a software partner that shares its focus on innovation.
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