Calculation of the added mass of a liquid tank’s bulkheads

Abstract

The added mass coefficient and the water level index formulas for the same-phase and anti-phase vibration of rectangular liquid tanks’ bulkheads were derived based on dry mode theory. Three fluid-structure interaction numerical methods including Fluid FEM and Fluid BEM were used in this case. The comparison of numerical and theoretical results by the present method shows that ANSYS/Fluid80 is more credible, the NASTRAN/Virtual Mass Method is more suitable for engineering calculations and results of the same-phase vibration by the present method is more accurate.

Keywords

added mass coefficient / dry mode theory / fluid-structure interaction (FSI) / fluid FEM / fluid BEM / liquid tank’ / bulkheads