| 立式储液罐象足屈曲的准静态数值模拟 |
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| 引用本文： | 葛颂,陈志平,沈建民,蒋家羚.立式储液罐象足屈曲的准静态数值模拟[J].压力容器,2006,23(1):6-9. |
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| 作者姓名： | 葛颂 陈志平 沈建民 蒋家羚 |
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| 作者单位： | 浙江大学,化工机械研究所,浙江,杭州,310027 |
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| 摘 要： | “象足”屈曲现象是大型钢制立式储液罐地震破坏的主要形式之一,它发生在靠近底部的壁板区域。在考虑大变形几何非线性和材料非线性条件下,本文利用非线性有限元法,以轴对称载荷壳单元模型,对一定尺寸范围内的储罐进行了准静态弹塑性屈曲分析。研究了受轴向压应力情况下,环向应力和轴向压缩失稳能力之间的关系。并强调了轴向压力是导致失稳的主导作用。
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| 关 键 词： | 象足屈曲 储液罐 非线性有限元 |
| 文章编号： | 1001-4837（2006）01-0006-04 |
| 收稿时间： | 2005-10-20 |
| 修稿时间： | 2005年10月20 |
Quasi-static Numerical Simulation of Elephant-foot Buckling of Cylindrical Liquid Storage Tanks |
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| GE Song,CHEN Zhi-pin,SHEN Jian-min,JIANG Jia-ling.Quasi-static Numerical Simulation of Elephant-foot Buckling of Cylindrical Liquid Storage Tanks[J].Pressure Vessel Technology,2006,23(1):6-9. |
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| Authors: | GE Song CHEN Zhi-pin SHEN Jian-min JIANG Jia-ling |
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| Affiliation: | Institute of Chemical Machinery, Zhejiang University, Hangzhou 310027, China |
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| Abstract: | The elephant-food buckling(EFB) is one of the main destruction phenomenon of large cylindrical liquid storage tanks during earthquake,which occurs on the shell near the tank base zone.This article uses nonlinear finite-element method,including both geometric and material nonlinearity,when modeling a axisymmetric loaded tank shell model in a typical range of dimension by a quasi-static elastic-plastic buckling approach.The relation of hoop stress and axial stress of the shell is analyzed under axial compressive stress.In addition,it concerns the predominant effect of axial stress leading to collapse. |
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| Keywords: | elephant-foot buckling liquid storage tanks nonlinear finite-element method |
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