地基沉降对石油储罐象足屈曲的影响

doi:10.16265/j.cnki.issn1003-3033.2018.09.010

中国安全科学学报 ›› 2018, Vol. 28 ›› Issue (9): 56-61.doi: 10.16265/j.cnki.issn1003-3033.2018.09.010

地基沉降对石油储罐象足屈曲的影响

石磊¹ 工程师, 帅健² 教授, 王晓霖¹ 教授级高工, 许葵²

1 中国石油化工股份有限公司大连石油化工研究院,辽宁大连 116045
2 中国石油大学(北京) 机械与储运工程学院,北京 102249

收稿日期:2018-06-05 修回日期:2018-08-05 出版日期:2018-09-28 发布日期:2020-09-28
作者简介:石磊(1985—),女,辽宁朝阳人,博士,工程师,主要从事储罐、管道等油气储运设施结构安全、失效分析和完整性管理等方面的研究。E-mail:missstone@163.com。
基金资助:
国家重点研发计划项目(2017YFF0210404)。

Effect of foundation settlement on elephant foot buckling of oil tank

SHI Lei¹, SHUAI Jian², WANG Xiaolin¹, XU Kui ²

1 Dalian Research Institute of Petroleum and Petrochemicals,China Petroleum & Chemical Corporation, Dalian Liaoning 116045, China
2 College of Mechanical & Transportation Engineering, China University of Petroleum, Beijing 102249, China

Received:2018-06-05 Revised:2018-08-05 Online:2018-09-28 Published:2020-09-28

摘要/Abstract

摘要： 为优化大型石油储罐的抗震设计,针对大型非锚固外浮顶储罐,综合考虑地基、非锚固罐底、变壁厚、抗风圈等几何结构和材料特性等因素,采用有限元分析(FEA)法构建储罐全模型,分析地基沉降对罐壁象足屈曲临界载荷的影响;基于Fourier变换,通过若干阶谐波组合的形式模拟储罐地基沉降,分析地基谐波沉降前后储罐的径向变形、屈曲模态与屈曲强度,探明储罐地基单次谐波沉降的谐波次数、谐波幅值、谐波的波峰与波谷对象足屈曲临界载荷的影响。结果表明:地基谐波沉降在不同程度上降低了油罐的象足屈曲临界载荷。储罐象足屈曲临界压应力随地基谐波沉降幅值的增大而减小;相同沉降量下,随着谐波次数的增大,储罐抗屈曲的能力越来越弱。

关键词: 储罐, 地基沉降, 谐波, 有限元分析(FEA), 象足屈曲

Abstract: The FEA method was used to build a full size model of large oil storage tank. Influences of foundation settlement on elephant foot buckling critical load of a large-scale, unanchored and external floating roof tank were analyzed in order to optimize the seismic design. Various items of tanks geometry including tank foundation, unanchored bottom with slope, tapered shell thickness, wind girders, stiffening rings, other attachments and appurtenances were taken into account thoroughly in the non-symmetrical full finite element model. On the basis of Fourier transform, foundation settlement was simulated by several combinations of harmonic waves. The radial deformation, buckling deformation mode and buckling strength were researched before and after foundation settlement. The influences of different orders of harmonic waves, harmonic wave amplitudes, trough and crest on elephant foot buckling critical load of tank were proved up while single harmonic settlement happened. The results show that foundation harmonic settlement has a negative influence on elephant foot buckling critical load, that the critical compressive stress of elephant foot buckling of tank shell decrease with the increasing harmonic amplitude of foundation settlement, and that the resistance capacity reduces as the harmonic order number rises under the same settlement.

Key words: tanks, foundation settlement, harmonic wave, finite element analysis(FEA), elephant foot buckling

中图分类号:

X937

石磊, 帅健, 王晓霖, 许葵. 地基沉降对石油储罐象足屈曲的影响[J]. 中国安全科学学报, 2018, 28(9): 56-61.

SHI Lei, SHUAI Jian, WANG Xiaolin, XU Kui. Effect of foundation settlement on elephant foot buckling of oil tank[J]. China Safety Science Journal, 2018, 28(9): 56-61.

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地基沉降对石油储罐象足屈曲的影响

Effect of foundation settlement on elephant foot buckling of oil tank

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