I am new to FAST, and i’m trying to get all the hydrodynamic forces calculated in FAST, and compared them with the tower base reaction (TwrBsFxt) because I assume that to achieve static equilibrium these forces most be equal.
So I obtained the hydrodynamic forces distributed in each member, transformed them in point loads, sum them and compare them with the resulting hydrodynamic forces calculated by hydrodyn (HydroFxi), and the results were quite similar.
Finally I add all the acting forces in X (hydrodynamics, inertial (-M * PtfmAxT) and moorings), and compared them with the Tower base reaction(TwrBsFxt) and got the next graphic:
The broken line is the tower base reaction, and the other one is the resultant of all my acting forces.
Can someone help me and tell me where my mistake is or if I need to consider another force?
Sorry If my english is not very good i hope you can understand what i’m asking.