Hi
I have a few question relating to trnasportation analysis, seastate and wave response modules:
1. Transportation (tow) Analysis: How to determine centre of roll of structure (option within 'weight' in precede) is it something SACS gives you when reporting CoG? That is, structure rolls about an axis through CoG?
2. Seatate: What is SEAS line. Please would you provide a practical description (I have already read it within SACS manual but there is still some confusion).
3. Wave response: What is SEED? Again please provide a practical description.
Many thanks.
In the case of tow fatigue, the naval architect would typically provide the structural engineer with response amplitude operators (RAO's) which are calculated using their hydrodynamic analysis in MOSES. The structural engineer would then calculate the fatigue data using the RAO's provided.
I've never seen any fatigue analyses performed for fabrication yard scenarios, probably because the structures typically are not there long enough and the loads are typically low enough that there is not appreciable amount of damage accumulated. I would imagine that the structural engineer would be responsible for performing the fatigue analysis, but these are questions outside the technical scope of SACS.
Regards,
Geoff