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Structural Engineering and Mechanics Volume 13, Number 4, April 2002 , pages 355-368 DOI: https://doi.org/10.12989/sem.2002.13.4.355 |
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Axisymmetrical free-vibration analysis of liquid-storage tanks considering the liquid compressibility |
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Cho JR, Lee JK
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| Abstract | ||
| In this paper, we address the numerical investigation on the effect of liquid compressibility onto the natural frequency of liquid-filled containers. Traditionally the liquid motion has been treated as an ideal fluid motion. However, from the numerical experiments for the axisymmetrical free-vibration of cylindrical liquid-storage tanks, we found that the relative difference in natural frequencies between ideal and compressible motions becomes remarkable, as the slenderness of tank or the relative liquid-fill height becomes larger. Therefore, in such cases of dynamic systems, the liquid compressibility becomes an important parameter, for the accurate vibration analysis. For the free-vibration analysis of compressible liquid-structure interaction we employed the coupled finite element formulation expressed in terms of the acoustic wave pressure and the structure deformation. | ||
| Key Words | ||
| axisymmetrical free vibration, liquid compressibility, acoustic wave, coupled liquid-structure formulation, relative difference, parametric variation | ||
| Address | ||
| Cho JR, Pusan Natl Univ, Sch Mech Engn, Pusan 609735, South Korea Pusan Natl Univ, Sch Mech Engn, Pusan 609735, South Korea | ||