Hello
I have 7 uncertain variables in my finite element model and I’m interested in the sound transmission loss of a structure. I work between 89 Hz and 1122 Hz. I get the results of my true model thanks to a commercial software.
I’d like to know how I can obtain the frequency response of my system using the PCE metamodel with Uqlab, so that I can compare it with the frequency response given by the true model. Is there an example in Uqlab?(attached is the frequency response of my model)
However, frequency response functions (FRFs) can be very tricky, especially if there are poles-zeros that “jump” due to the uncertain input parameters. In that case, a stochastic frequency transformation could help (also combined with PCA/POD, see https://www.sciencedirect.com/science/article/abs/pii/S0266892016301825).