Pole-Matching Technique for Parametric Model Order Reduction of Second Order Vibroacoustic Systems
* Presenting author
Abstract:
The field of vibroacoustics entailing simulation of large-scale models has seen numerous applications of model order reduction techniques to reduce the computational effort. However, regular reduction approaches are unable to contain parameter variations, deeming parametric model order reduction methods necessary.To further decrease the computation time for fast-paced parameter changes, parametric reduced-order models (pROMs) spanning the desired parameter space are built. A popular approach is to first produce reduced-order models interpolating the frequency domain (fROMs) at different parameter values and then using an appropriate technique to combine the different fROMs to yield the final pROM or surrogates in the parameter space. A promising technique to perform interpolation of fROMs for vibroacoustic systems to yield a pROM is the pole-matching technique. Using the pole-residue depiction, the fROMs are rearranged so their respective poles match.Pole-matching approaches are widely applied to first-order systems. However, for second-order vibroacoustic systems, the technique can be efficiently applied by preserving the second-order characteristics for interpolation in the parameter domain. Therefore, the contribution aims to adapt a pole-matching technique so as to yield faster computation of second-order system responses in the parameter domain. Finally, the effectiveness of the technique is evaluated with application to typical vibroacoustic problems.