Study on the flutter inhibition of honeycomb plates in porous flexible phononic crystal

The flutter generated by satellite disturbance equipment seriously affects the accuracy and communication rate of satellite precision equipment. Among them, the momentum wheel that contributes a lot, the flutter disturbance is concentrated in the frequency ranges of 0∼30 Hz and 220–270 Hz. This paper innovatively fills the local resonance unit composed of flexible materials into the honeycomb holes of the honeycomb sandwich plate, and designs a porous flexible phononic crystal (PFPC) to suppress the flutter signal generated by the momentum wheel. First, a theoretical model of PFPC was established, and the band gap characteristics and vibration-damping mechanism of PFPC were analyzed in detail based on the theoretical model method and the finite element method. The results show that PFPC can form a complete band gap within the target frequency range of 220.6–277.1 Hz, and drilling holes in the cladding layer and scattering body of PFPC can achieve adjustment of the band gap range and width. Compared with the transmission losses of satellite cabin plates, porous flexible phononic crystal honeycomb plates (PFPC-HCP) and porous flexible phononic crystal honeycomb plates without mounting pressing seats (PFPC-HCP WCS), PFPC-HCP showed significant flutter suppression in two frequency ranges. Installing the compression seats reduced the flutter suppression performance of PFPC-HCP, but it still maintained excellent flutter suppression performance. Comparing the transmission loss between silicone rubber blocks and aluminum alloy blocks, the improvement of flutter suppression performance of filled silicone rubber is verified. The PFPC-HCP proposed in this paper integrates the vibration-absorbing characteristics of phononic crystal, honeycomb structures, and flexible materials, and broadens the application potential of phononic crystal in satellite flutter suppression.