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July 24, 2015, 13:24 |
Computing RAOS with AQWA
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#1 |
New Member
Join Date: Jul 2015
Posts: 3
Rep Power: 10 |
Hi everyone,
I'm trying to compute RAOs of a FPSO using Ansys AQWA. But it seems I'm doing something wrong because the RAOs of some degrees of freedom are completely out of range (27 deg/m in roll, while 5 deg/m expected) even if the general allure of the curves are fine (with pic periods corresponding). I thougth I was doing everything right, step by step :
I'm pretty my geometry and mass/inertia distribution are okay because hydrostatics are fine. Does anyone know if AQWA's output must be dimensionalized by some factor, or if I forgot any option during calculation, or something else ? Thank you. Regards, Antoine |
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July 27, 2015, 10:33 |
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#2 |
New Member
Join Date: Jul 2015
Posts: 3
Rep Power: 10 |
It seems that I must define an additional damping due to viscosity. After a quick search, I read that the FIDD could suffice, but I didn't really understood how to use it. Please could someone explain it ?
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