Damping Perturbation Method for Flutter Solution: The g-Method

By utilizing a damping perturbation method, the present g-method includes a e rst-order damping term in the e utter equation that is rigorously derived from the Laplace-domain aerodynamics. The g-method generalizes the K-method and the P ‐K method for reliable damping prediction. It is valid in the entire reduced frequency domain and up to the e rst order of damping. The g-method utilizes a reduced-frequency sweep technique to search for the roots of the e utter solution and a predictor-corrector scheme to ensure the robustness of the sweep technique. The solution algorithm of the g-method is proven to be efe cient and robust and can obtain an unlimited number of aerodynamic lag roots, as demonstrated by the results of the selected test cases.