Hi,
I wanted to add some details about my problem.
If I run a simulation with the parameters I mentioned in my previous messages, I obtain NaN results.
But if I set up the peak period at 6.1s and the minimum spectral period at 6s, I got results.
As said, I think that the problem is linked to the relation between the mesh size and the wave length but I can't understand my problem because it should work. Does someone have a explanation ?
Here is a link of the geo file if you want to check the mesh size.
drive.google.com/open?id=1ds-WZwoFLjrnxTsdfGnLyaKepit4btpL
Thanks for your attention, Julien.