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| 卧式埋地储罐稳定性研究 |
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李玉坤1,林俊丞1,刘浩2,姜雪3,路太辉4
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(1.中国石油大学(华东)储运与建筑工程学院,山东青岛 266580;2.中国石化中原石油工程设计有限公司,河南郑州 450000;3.河南省医药设计院有限公司,河南郑州 450000;4.中国石油北京天然气管道有限公司,北京 100020)
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| 摘要: |
| 埋地卧式储罐受力条件复杂,其应力和变形较难计算。根据储罐实际受力特点,建立储罐稳定性的有限元计算模型。采用非线性径向力和切向力描述给定埋深储罐的覆土压力,利用ANSYS软件对储罐模型进行屈曲分析。将屈曲特征值作为储罐埋深迭代系数,计算新的储罐埋深,重新进行屈曲分析。结果表明:新储罐失稳临界埋深计算方法可用于对储罐模型进行屈曲分析,多次迭代后屈曲特征值接近1,此时对应的埋深即储罐失稳临界埋深。 在储罐结构上设置加强圈可大幅提升埋地储罐的稳定性,为储罐埋深设计提供充足的安全裕量。 |
| 关键词: 埋地储罐 径向力 切向力 特征值屈曲 临界埋深 |
| DOI：10.3969/j.issn.1673-5005.2019.01.017 |
| 分类号::TQ 052 |
| 文献标识码:A |
| 基金项目:中国石油科技创新基金项目(2017D-5007-0605) |
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| Stability investigation of buried horizontal tank |
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LI Yukun1, LIN Juncheng1, LIU Hao2, JIANG Xue3, LU Taihui4
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(1.College of Pipeline and Civil Engineering in China University of Petroleum(East China), Qingdao 266580, China;2.SINOPEC Petroleum Engineering Zhongyuan Corporation, Zhengzhou 450000, China;3.Henan Pharmaceutical Designing Institute Company Limited, Zhengzhou 450000, China;4.PetroChina Beijing Natural Gas Pipeline Company Limited, Beijing 100020, China)
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| Abstract: |
| The loading conditions are very complex for the buried horizontal storage tank, and therefore it is difficult to calculate its stress and deformation accurately. Based on the real loads of the pressure vessel, the finite element model on the stability of the tank was built. Non-linear radial and tangential forces were adopted to describe the casing pressure of the tank with a given depth, and buckling analysis of the tank model was carried out by the ANSYS software. The eigen values obtained by the buckling analysis were used as iteration parameters to calculate the new buried depth of the tank, and the new buckling analysis is made with the updated data. The result shows that the calculation method of the critical buried depth on the instability of the tank can be used to perform the analysis of tank buckling. The eigen value from series of buckling analysis comes close to the value of one, and in this case the corresponding buried depth is just the critical in stability value. It indicates that adding a strengthening ring can enhance the stability of the buried tank, which can provide enough safety margin for the design of tanks with a big buried depth. |
| Key words: buried storage tanks radial pressure tangential pressure eigen value buckling critical depth |
