242 / 2021-04-14 16:40:53

Vibro-acoustic response of the rectangular panel with elastic constraints induced by aeroacoustic noise from the backed cavity

Vibro-acoustics,aeroacoustic,cavity,elastic constrain

The general structural restrain need to be considered in the vibro-acoustic model analytically for representing the most common boundary conditions in the real engineering structure. The present work proposes to uses a vibro-acoustic model of the rectangular panel with elastic constraints for studying its responses induced by aeroacoustic noise in rectangular cavity. The vibro-acoustic model of the panel backed with cavity is established by considering the general structural restrains firstly. The aeroacoustic noise in the rectangular cavity is analyzed with different flow conditions by computational fluid dynamics（CFD）method and transferred to surface loads on the bottom panel baked by the cavity. Then, the vibrational response and radiated sound pressure of the panel are calculated by substituting the loads into the vibro-acoustic models. Finally, the effects of the boundary conditions, such as stiffness, damping, on the vibrational response and radiated noise of the panel are studied to reveal the transmission principles of the aeroacoustic noise on the panel with elastic restraints.