Hi,
sorry for the late answer but I was out of this office for some weeks. Thanks for the answer, I will look at it. This could be an explaination.
Cheers.
Hi,
doing a frequency response, I requested the output to be calculated also at the eigenfrequency of my structure by mean of a FREQ3 card.
Looking at the results, I noticed that the eigenfrequencies reported were slightly different that those I could calculate directly from a modal analysis...