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Transient Fluid-Structure Interaction of a Cylindrical Tank with a Flexible Baseplate

by Daniel D. Kana, Southwest Research Inst, San, Antonio, TX, USA,
James R. Fitch, Southwest Research Inst, San, Antonio, TX, USA,
Joseph C. Choi, Southwest Research Inst, San, Antonio, TX, USA,



Document Type: Proceeding Paper

Part of: Structural Engineering in Nuclear Facilities

Abstract:

Analytically predicted coupled natural frequencies, response functions, and transient responses are compared with measured values for a partially filled cylindrical tank subject to excitation by a small piston at the bottom center. The flexible tank sidewall and bottom and contained water are represented by a finite element analytical model. Accuracy is demonstrated for a linear hybrid method, in which fluid pressures are coupled directly with generalized coordinates of the structure. The analysis is restricted to axisymmetric modes, although the presence of nonsymmetric response is prominent in the experimental data. The latter responses are attributed to tank nonsymmetry.

Subject Headings: Cylindrical tanks | Finite element method | Transient response | Coupling | Natural frequency | Hybrid methods | Fluid-structure interaction

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