Abstract
Theoretical studies were conducted to clarify hydroelastic vibrations of a cylindrical tank filled with liquid under low-gravity. The liquid, which was treated as "potential flow", has a static configuration as an equilibrium interface between a liquid and a gas due to the surface tension in low-gravity field. Assuming free vibration of the system in the axial direction of tank, we derived the frequency equation by using Rayleigh-Ritz method. Coupled natural frequencies were obtained as an eigenvalue. In the vicinity where the natural frequencies of rigid tank and elastic beams intersect with the natural frequencies of liquid, frequency curve veering phenomena was observed.
