Abstract
The liquid sloshing in tank has an effect on the stability of spacecrafts. Some slosh baffles are often installed in the tank for damping liquid slosh. The coupled oscillation of liquid in a cylindrical tank with elastic damping spacer is investigated. The free-surface condition is considered in the study, because of the complication of the coupled boundary-value problem of liquid and elastic damping spacer, there are great difficulties in using analytical methods. Two different velocity potential functions corresponding respectively to the liquid above and below the damping spacer are assumed. The coupled frequency equation is obtained by using double velocity potential functions. Through numerical computation and theoretic analysis, it is shown that natural frequency changes according to the location and stiffness of the spacer.
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