天然气与石油2026，Vol.44Issue(4)：21-27,7.DOI:10.3969/j.issn.1006-5539.2026.04.003
大型储罐筒体失稳双向应力校核方法的分析与比较
Analysis and comparison of biaxial stress verification methods for instability of large storage tank cylinders
余涛 1王永朝 2戚家明 3万娟1
作者信息
- 1. 中国石油工程建设有限公司西南分公司,四川 成都 610041
- 2. 中国石油天然气集团有限公司工程和物装管理部,北京 100007
- 3. 江苏国信液化天然气有限公司,江苏 南通 226400
- 折叠
摘要
Abstract
Large storage tanks feature large diameters and thin walls,combined with heavy roof loads and working condition loads such as negative pressure,wind pressure,and snow loads.As a result,significant tensile and compressive stresses occur along both circumferential and axial directions of the tank shell.Verifying strength and stability under biaxial stress conditions is therefore particularly important.This paper analyzes and compares design methods for biaxial stress in large storage tanks specified by the American standard API 620-2025 Design and construction of large,welded,low-pressure storage tanks and the Russian standard SP 495.1325800-2020 Isothermal tanks for storage of liquefied gases design rules.Through a stability verification case of the cylindrical shell under axial compression,it is proposed that,although API 620-2025 does not provide a formula for instability checking under simultaneous longitudinal and circumferential compression,the special case in Appendix F of API 620-2025 where the cylinder shell is under axial compression and no compression or tension acts circumferentially—can be used as a simplified method for longitudinal instability verification.The verification conclusions from this simplified calculation are compared with results from the instability verification method in SP 495.1325800.2020 and numerical simulations performed by Ansys Workbench,confirming the correctness of the simplified approach.The results indicate that for the biaxial stress design of large storage tanks,the simplified longitudinal instability calculation based on the Appendix F special case of API 620-2025 is valid.This study provides useful references for the design of large storage tanks in engineering practice.关键词
双向应力/圆柱筒体/经向/受压/稳定性/美国标准/俄罗斯标准/AnsysKey words
Biaxial stress/Cylindrical shell/Axial/Compression/Stability/American standard/Russian Standard/Ansys引用本文复制引用
余涛,王永朝,戚家明,万娟..大型储罐筒体失稳双向应力校核方法的分析与比较[J].天然气与石油,2026,44(4):21-27,7.
