Analysis of longitudinal fluid sloshing in tank wagon

In order to study the phenomenology of fluids dynamic performance in containers and assessment of fluids specification in a closed container, the longitudinal sloshing of fluids has been studied and the mechanical parameters of sloshing in a horizontal cylindrical container have been extracted through image processing. The test stand was prepared and three different fluids, water, petrol and oil, were tested in three filling percentages of 30%, 50% and 80% and the sloshing dominant frequency and the damping ratios of these fluids were extracted. In the following, fluid sloshing is simulated by using 2D equivalent mechanical model, and the parameters of vibration that include mass, spring stiffness and damping coefficient are calculated using an optimised equivalent mechanical model. Then the results of experimental tests are compared with optimised equivalent mechanical model results.