FREE-VIBRATION ANALYSIS OF LIQUID-FILLED TANK WITH BAFFLES

• Published in: Journal of sound and vibration Vol. 259; no. 1; pp. 177 - 192
• Main Authors: BISWAL, K.C., BHATTACHARYYA, S.K., SINHA, P.K.
• Format: Journal Article
• Language: English
• Published: London Elsevier Ltd 2003; Elsevier
• Subjects: Computational techniques; Exact sciences and technology; Finite-element and galerkin methods; Fundamental areas of phenomenology (including applications); Mathematical methods in physics; Physics; Solid mechanics; Structural and continuum mechanics; Vibration, mechanical wave, dynamic stability (aeroelasticity, vibration control...); Vibrations and mechanical waves; Natural frequency; Finite element method; Annular plate; Obstacle; Hydroelasticity; Free vibration; Numerical method; Diaphragm; Cylindrical shell; Storage tank; Structural analysis; Liquid sloshing
• ISSN: 0022-460X; 1095-8568
• DOI: 10.1006/jsvi.2002.5087

The natural frequencies of liquid in a liquid-filled cylindrical rigid tank without and with baffles are evaluated. An annular plate is used as a baffle, which is fitted to the inner periphery of a cylindrical tank. Both rigid and flexible baffles are considered. Finite elements are used to discretize both the liquid and the structural domain. The slosh frequencies of liquid are computed for different dimensions, thicknesses and positions of baffles, both rigid and flexible considering the circumferential wave number as one. The axisymmetric and other asymmetric modes are not studied. The results obtained for rigid baffle case are comparable with the existing results. The coupled vibration frequencies of the tank-flexible-baffle system are computed considering the effect of sloshing of liquid.