A new multiphysics mode synthesis (MMS) is presented for the construction of reduced-order models of acoustic fluid-structure interaction systems. The present acoustic-structure interaction model is symmetric and consists of the fluid pressure p, the fluid displacement potential φ, and the structural displacement u. In carrying out MMS, the structure is first reduced, which is then applied to the coupling terms in the acoustic (p, φ)-equations. The fluid parts (p, φ) are then reduced while preserving the coupling effects, resulting in improved accuracy. A combination of a priori modal contribution indicator and cumulative error estimator are derived from the moment matching approach that provides rational criteria for how many structural and fluid modes need to be retained for the construction of reduced models. An iterative MMS algorithm is then proposed by combining the modal indicators and error estimators. The performance of the proposed MMS method is illustrated via numerical examples.
|Number of pages
|International Journal for Numerical Methods in Engineering
|Published - 2020 Dec 15
Bibliographical noteFunding Information:
This research was supported by the Basic Science Research Programs through the National Research Foundation of Korea funded by the Ministry of Science, ICT, and Future Planning (NRF‐2016R1A2B4013885, NRF‐2018R1A1A1A05078730, NRF‐2018K2A9A1A06069632).
National Research Foundation of Korea, NRF‐2016R1A2B4013885; NRF‐2018K2A9A1A06069632; NRF‐2018R1A1A1A05078730 Funding information
information National Research Foundation of Korea, NRF-2016R1A2B4013885; NRF-2018K2A9A1A06069632; NRF-2018R1A1A1A05078730This research was supported by the Basic Science Research Programs through the National Research Foundation of Korea funded by the Ministry of Science, ICT, and Future Planning (NRF-2016R1A2B4013885, NRF-2018R1A1A1A05078730, NRF-2018K2A9A1A06069632).
© 2020 John Wiley & Sons, Ltd.
- a priori error estimator
- fluid-structure interaction
- mode selection
- multiphysics mode synthesis
- reduced-order modeling
- structure-acoustic interaction
ASJC Scopus subject areas
- Numerical Analysis
- General Engineering
- Applied Mathematics