AEROELASTIC RESPONSE CALCULATION USING DUHAMEL INTEGRAL AND ITS APPLICATIONS

Resumo

© 2021 32nd Congress of the International Council of the Aeronautical Sciences, ICAS 2021. All rights reserved.A method for calculation of dynamic response to gust and control surface excitations, which allows the inclusion of nonlinear terms such as nonlinear control laws, without the need to use rational function approximation, is presented. This method is based on characteristic responses obtained with frequency domain equations, which associated with Fourier transforms, can be used to calculate time domain dynamic responses via Duhamel Integrals. The Duhamel Integral method is demonstrated for a typical airfoil section with three degrees of freedom, making use of frequency domain equations and direct and inverse Fourier Transforms for the characteristic response computation. In addition, applications where this method presents advantages, such as in the application of non-linear control laws and analysis of Oscillatory Malfunction (OMF), are demonstrated.

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