A Fast Aeroelastic Response Prediction Method Based on Proper Orthogonal Decomposition Reduced Order Model

CFD/CSD coupled numerical simulation is the most accurate method in aeroelasticty,but it is also with the least computation efficiency.A reduced order model(ROM) based on proper orthogonal decomposition(POD) for aeroelastic system was investigated in this paper.In order to further reduce the higher order of time-domain POD/ROM relative to frequency-domain POD/ROM,the balanced truncation method in control theory was introduced.The detail of the construction of time-domain POD/ROM was demonstrated by AGARD 445.6 wing and the ROM was then used to predict the aeroelastic dynamic response and flutter boundary.The numerical results show that the POD/ROM nearly has the same accuracy as the CFD/CSD coupled method and improves the computation efficiency about 1~2 order of magnitude.