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Finite element techniques for the free-vibration and seismic analysis of liquid-storage tanks

✍ Scribed by J.R. Cho; J.M. Song; J.K. Lee

Publisher
Elsevier Science
Year
2001
Tongue
English
Weight
360 KB
Volume
37
Category
Article
ISSN
0168-874X

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✦ Synopsis

This paper is concerned with the re"ned numerical techniques for the seismic analysis as well as the free vibration analysis of liquid-storage tanks. In the numerical formulation of accurate added-mass matrix, for the construction of uncoupled-separated structural dynamic system, the liquid free-surface #uctuation is taken into consideration. In order to resolve the non-linearity and non-orthonormality of resulting frequency-dependent added-mass matrices and natural modes, we propose a rapid convergent iterative numerical scheme for computing added-mass matrices, as well as a modi"ed numerical procedure for the seismic analysis. Through the numerical experiments with a closed-type tank, excited by a random horizontal earthquake wave, we compare the numerical results by the proposed re"ned numerical techniques with those by the classical approaches, together with the detailed investigation of the proposed numerical scheme.

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