A numerical framework for full-bridge aeroelasticity is presented, based on unsteady cross-sectional load models and on the finite element modeling of the structure. A frequency-domain approach based on aeroelastic derivatives and nonlinear complex eigenvalue analysis is compared to its equivalent time-domain counterpart based on indicial functions and direct integration of the equations of motion. A version of the time-domain load model consistent with the quasi-steady limit behavior is developed and a procedure for the numerical identification of the indicial functions from measured aeroelastic derivatives is presented. The aeroelastic stability analysis is chosen as benchmark. A numerical example is offered where the equivalency of the two approaches is proved for a full-bridge model. Advantages and disadvantages of the two techniques are discussed.

Frequency- and time-domain methods for the numerical modeling of full-bridge aeroelasticity / L. Salvatori; C. Borri. - In: COMPUTERS & STRUCTURES. - ISSN 0045-7949. - STAMPA. - 85:(2007), pp. 675-687. [10.1016/j.compstruc.2007.01.023]

Frequency- and time-domain methods for the numerical modeling of full-bridge aeroelasticity

SALVATORI, LUCA;BORRI, CLAUDIO
2007

Abstract

A numerical framework for full-bridge aeroelasticity is presented, based on unsteady cross-sectional load models and on the finite element modeling of the structure. A frequency-domain approach based on aeroelastic derivatives and nonlinear complex eigenvalue analysis is compared to its equivalent time-domain counterpart based on indicial functions and direct integration of the equations of motion. A version of the time-domain load model consistent with the quasi-steady limit behavior is developed and a procedure for the numerical identification of the indicial functions from measured aeroelastic derivatives is presented. The aeroelastic stability analysis is chosen as benchmark. A numerical example is offered where the equivalency of the two approaches is proved for a full-bridge model. Advantages and disadvantages of the two techniques are discussed.
85
675
687
L. Salvatori; C. Borri
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2158/365027
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