EXPERIMENTAL INVESTIGATION OF THE TRANSITION BETWEEN LINEAR TO CHAOTIC REGIMES OF SLOSHING

Abstract

The aim of this paper is to characterize the sloshing regimes in a cylinder and to statistically study the chaotic transition close to the natural frequency. The study was motivated by the lack of experimental data close to the chaotic transition. Using a dedicated shaking table called SHAKESPEARE, a statistical study was performed to exhibit a specific trend close to the transition. The performed tests were compared to the literature and show a slight difference which could be due to a different position of the probes. Close to the transition, a "plateau" in the amplitude of the free surface was observed and characterized using a phase portrait. It shows an elliptical limit cycle dependent on the test conditions. It is especially dependent on the starting point (still or moving water) which was studied in this paper. A later transition position was then observed when applying a frequency at the beginning of the test to break the "still water" assumption.