To provide a method for reducing vibration of a structure including at least one rotor 101j, and a set of fixed perturbation sources 102j capable of generating perturbation in a fluid flow 11 and vibrating the rotor.
The method includes: a step of involving non-uniform angular distribution of the fixed perturbations so as to reduce an amplitude of excitation received by the rotor; and a step of verifying that a maximum amplitude of response of the rotor is obtained by a step of determining a first signal in which a Fourier transformation corresponds to a frequency spectrum of the excitation when the fixed perturbation sources are distributed along the predetermined uniform angular distribution, a step of modifying the first signal to a second signal adapted to the selected angular distribution for the fixed perturbation sources, a step of determining a frequency spectrum of excitation by calculating a Fourier transformation of the second signal, and a step of calculating response of the rotor with respect to the excitation on the basis of the frequency spectrum of the excitation.
CLOAREC YVON
SEINTURIER ERIC
Katsuma Osaki
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