AQWA irregular wave

Hello everybody
I'm a Engineer from turin, worling on the design of a small hull. I use AQWA from ANSYS workbench (I know it's limitated, but it's a lot easier), and I'd like to simulate my hull in time domain with an irregular wave. Sadly, when I start my simulation, I get the error "CALCWN:FAILED TO CONVERGE" and the simulation aborts.
Anyone knows how to solve this? And more than this, anyone knows where could I find a troubleshooting that explains the meaning of AQWA's message errors? I couldn't find that even in the manuals...

Thanks!!

 

Hello Jaqen

Well, frankly I also don't know about this error because I am also a beginner in AQWA. You can get meanings of errors from AQWA Reference Manual.Causes are also given in it but troubleshooting is not available.

Regards

Nabeel

 

I haven't seen that one before, so I'm sort of scratching my head on that one, but, my first guess was a convolution problem. Are you using the convolution option? What about cable dynamics?

 

Hi,
I've finally understood, it was a stupid error: the sample frequency of my irergular wave was near to the simulation time step, and so it caused errors. I've re-sampled them, and the problem was gone.
Thanks everybody anyway!

 

Congrats! So, it does indeed sound like it was a convolution problem. Good work.

 

Hi all! I am also using ansys AQWA to model a simple vertical cylindrical pile in regular waves in order to extract the morison drag forces on the pile. The results seem to make sense, howver, when I change the water level, the results do not change. This is strange since the results are very dependant on the water level, and at the extreme if the water level is below the whole structure the results should be 0 force all the time. But this is not the case. What could be the problem here?
Thanks in advance!