Hi everybody,

here I am again after a long silence with a new question:

In my understanding, BMODES calculates and outputs modal shapes as adimensional plots of normalized displacement vs. normalized beam length. And every mode shape can be coupled, in the sense that it can contain both fore-aft and side-to-side components.

FAST, that I am approaching for the first time, does require for the same input polynomial coefficients, and moreover it requires that the polinomials be already categorized as â€śfore-aftâ€ť or â€śside-to-sideâ€ť.

Is there a right way to go from BMODES output to FAST input? since the BMODES manual states that ultimately BMODES is a preprocessor for FAST, I am unsure if my interpretation is correctâ€¦ I would have expected an optional polynomial coefficient output, or something similar.

Of course I can interpolate the data and calculate the polynomial coefficients myself, and try to decide if a given shape is fore-aft or side to side, but I wanted to be sure that this is expected from the user, that I am not missing some â€śpieceâ€ť of software, or misinterpreting the manual.

Best regards and thanks a lot in advance!

Claudio Pedrazzi