Flutter boundary prediction method based on CEEMDAN

Daheng Zhou; Li Zhou

doi:10.1117/12.2612246

18 April 2022 Flutter boundary prediction method based on CEEMDAN

Daheng Zhou, Li Zhou

Proceedings Volume 12047, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XVI; 120471C (2022) https://doi.org/10.1117/12.2612246
Event: SPIE Smart Structures + Nondestructive Evaluation, 2022, Long Beach, California, United States

Abstract

In order to predict the flutter boundary of the wing under turbulent excitation, wavelet decomposition is used to preprocess the signal, and the free attenuation signal is extracted based on CEEMDAN and natural excitation technology. The matrix pencil method is used to identify the modal parameters. Finally, the Z-W method is used to determine the aircraft loss stability, fit the change curve of the judgment and extrapolate the flutter boundary. The modal parameters of the simulated turbulence excitation signal are identified, the numerical simulation of the flat wing model is carried out, and the wind tunnel flutter test data of a single wing model are calculated. The results show that: using matrix pencil method to process the free attenuation signal obtained by ceemdan, wavelet de-noising and natural excitation technology, the modal parameters of turbulent excitation response can be identified more accurately, combined with Z-W method, the flutter boundary can be predicted in the case of early wind speed, and the test safety can be improved.

Citation Download Citation

Daheng Zhou and Li Zhou "Flutter boundary prediction method based on CEEMDAN", Proc. SPIE 12047, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XVI, 120471C (18 April 2022); https://doi.org/10.1117/12.2612246

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