[nelos23]

Hi everyone,

I am trying to simulate a ship in self propulsion using DFBI Superposed Rotation. I started the simulation with a big time step(0.05s) to let the resistance converge and then I decreased the time step (0.0005s) to let solve the motions of the propeller. When I changed the time step the simulation huge osculations appeared in the signal. Am I doing something wrong? Also the sign of thrust change so negative to positive.
Im attaching some pictures so you can have a look.

Thanks in advance.

[Stefanos M]

Hi Andreas, I am reading your post as I am dealing with the same situation, did you find a way to overcome this behaviour, thank you very much!