Resonant frequencies in an elevated spherical container partially filled with water: FEM and measurement

被引：49
作者：
Curadelli, O. [1 ]
Ambrosini, D. [1 ]
Mirasso, A. [1 ]
Amani, M. [1 ]
机构：
[1] Univ Nacl Cuyo, CONICET, Ctr Univ, RA-5501 Mendoza, Argentina
来源：
JOURNAL OF FLUIDS AND STRUCTURES | 2010年 / 26卷 / 01期
关键词：
Fluid-structure interaction; Spherical storage tanks; Free vibration response; LIQUID-STORAGE TANKS; FREE-VIBRATION ANALYSIS; NONLINEAR HYDROELASTIC VIBRATION; STRUCTURE-SOIL INTERACTION; RECTANGULAR TANKS; CYLINDRICAL TANK; DYNAMIC-ANALYSIS; SLOSHING FREQUENCIES; SEISMIC BEHAVIOR; FINITE-ELEMENT;
D O I：
10.1016/j.jfluidstructs.2009.10.002
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
In this paper, a numerical-experimental study of the overall dynamical response of elevated spherical tanks subjected to horizontal base motion is presented. The main objective is to gain insight in the physical response of this particular structural typology widely used in the petrochemical industry as liquefied petroleum gas (LPG) containers In order to identify the natural frequencies of the modes that mainly contribute to the response. experimental free vibration tests on an elevated spherical tank model for different liquid levels were carried out. Next, a numerical model that takes into account the coupling between fluid and structure was developed and validated against the experimental results. A very good agreement between experimental and numerical results was obtained The results obtained show the influence of liquid levels on natural frequencies and indicate that the sloshing has a significant effect on the dynamical characteristics of the analyzed system In order to obtain a good representation of the overall dynamical behaviour of the system by means of a simplified lumped mass model, a minimum of three masses is suggested Finally, appropriate names of these three masses are proposed in the present paper (C) 2009 Elsevier Ltd All rights reserved
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页码：148 / 159
页数：12
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