Hi,
I am rather new to Comsol and have a question. Currently I am studying stiffened plates with the shell physics of the structural mechanics module and perform a modal analysis and calculation of frequency response functions, using the "Frequency Domain, Modal" study in Comsol 5.4. I have added a point grid on my plate to sample the frequency response functions at discrete points with respect to the structural wavelength, which I also need for some more post-processing, later on.
I am performing a parametric sweep to change the forcing position on the plate (which is linked to a coordinate on the plate). I am wondering whether it is possible to do the Eigenanalysis (which in my case takes quite a while since I include all modes up to 10 kHz) only once and store the solutions (eigenvalues and eigenvectors) to then perform the modal summation for all forcing points via sweep. Currently for each defined forcing point, when using the parametric sweep, my model is doing the Eigenanalysis again. My geometry and mesh do basically not change, but the geometry needs to be recalculated to correctly assign the new forcing position. I have seen there is a option in the "Frequency Domain" study node called "reuse solution from previous step" but when I activate it, the calculation time does not go down and according to the progress log I am following, it still repeats the Eigenanalysis. Maybe my way is not the most straight-forward way and the problem lies within the way I designed my model. But, if there is any solution to calculate the Eigenanalysis once and reuse it and someone has an idea how to, I would be very happy to receive some help. Many thanks in advance.
Kind regards, Christopher
PS: In case you need more detailled information, please let me know and I will add them in a reply.