NONLINEAR SLOSHING ANALYSIS OF CYLINDRICAL LIQUID STORAGE TANK WITH SINGLE-DECK TYPE FLOATING ROOF
NONLINEAR SLOSHING ANALYSIS OF CYLINDRICAL LIQUID STORAGE TANK WITH SINGLE-DECK TYPE FLOATING ROOF
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单层浮顶圆筒形液体储罐非线性晃动分析
DOI：
10.3130/aijs.74.1603
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
Y. Minakawa
中科院分区：
文献类型：
--
作者：
Kenji Yamamoto;Y. Minakawa
本文提出了单层浮顶储液罐非线性晃动分析的有限元方法。将具有几何非线性的弹性有限元应用于浮顶的建模，并基于位势理论和变分原理建立了流体单元。根据变分原理建立了弹性体与流体的相互作用问题，从而简化了平衡方程的推导。以2003年东京地震中的10万kl储罐为算例，进行了地震反应分析。结果表明，随着浮顶上第二阶振型的增长，浮顶可能发生高阶振型振动，其变形为1阶径向振型和3阶周向振型，浮顶可能会产生较大的应力，从而导致浮顶坍塌。
This paper proposes a finite element method for nonlinear sloshing analysis of the liquid storage tanks with the single-deck type floating roof. The elastic finite elements with geometrical non-linearity are applied on modeling the floating roof, and the liquid elements are formulated based on the potential theory and the variational principle. The interaction problem of the elastic body and the fluid is formulated based on the variational principle, therefore the equilibrium equations are simply derived. The 100,000kl tank struck by the 2003 Tokachi-oki earthquake is modeled for the numerical example, and the seismic response analysis is performed. As this result, it is found that the high-order mode vibration, of which deformation is the 1st radial mode and the 3rd circumferential mode, might occur as the second mode vibration grows on the floating roof, and large stress such that the pontoon is collapsed might appear in the floating roof.