Abstract
We investigated the dynamic chracteristics of the longitudinal (axi-symmetric) sloshing of liquid in a concentric membrane tank. We conducted an experiment using a circular cylindrical tank having a rigid outer wall and a flexible inner wall. The three materials used for the inner walls, rigid acrylic, Kapton film and polyethylene foam sheeting. We found that in the membrane wall, the outer part resonant phenomenon was difficult to clearly discern, because of the heavy motion coupling of the inner and outer liquids through the flexible membrane wall. Consequently the apparent damping ratio was increased with decreasing rigidity of the membrane wall.
