Dear everyone:

Hello! Sorry that my question may take up your valuable time.

Recently I have a technical problem in the data processing. We have conducted a series of wind tunnel tests in order to investigate the differences between the vibrating model and the static model. As shown in the figures below, there are certainly some differences in the aerodynamic force spectra at various reduced wind speeds which are our expected before. We believe that the motion of the model accounts for those differences. So our goal is to extract the different components at the vibrating frequency between the two signals. We had tried some methods, such as AMD (Analytical Modal Decomposition), but the results were very poor.

So, is there any method applicable to this problem? Thanks in advance.

Yours sincerely,

Guoqiang FU