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[1]张瑞宇,张玉平,孙明源,等.弹性大补偿密封作用下储罐钢制双盘式浮顶的受力特性[J].油气储运,2025,44(01):1-13.
　ZHANG Ruiyu,ZHANG Yuping,SUN Mingyuan,et al.The mechanical characteristics of the double-deck steel floating roof for storage tank utilizing elastic compensation seal[J].Oil & Gas Storage and Transportation,2025,44(01):1-13.

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弹性大补偿密封作用下储罐钢制双盘式浮顶的受力特性

《油气储运》[ISSN:1000-8241/CN:13-1093/TE] 卷: 44 期数: 2025年01期页码: 1-13 栏目: 出版日期: 2025-01-25

Title:: The mechanical characteristics of the double-deck steel floating roof for storage tank utilizing elastic compensation seal

作者:: 张瑞宇；张玉平；孙明源；李荣彬；王世强；陶彬

Author(s):: ZHANG Ruiyu；ZHANG Yuping；SUN Mingyuan；LI Rongbin；WANG Shiqiang；TAO Bin

关键词:: 大型储罐; 浮顶; 弹性大补偿密封; 桁架; 应力分布; 罐体变形

Keywords:: large storage tank; floating roof; elastic compensation seal; truss; stress distribution; tank wall deformation

文献标志码:: A

Abstract:: [Objective] The environmental protection requirements for emission are gradually strict, floating roofs being in full contact with liquid surface and elastic compensation seals are used on floating roof storage tanks. Under the combined action of sealing, tank wall deformation, and other factors, the floating roof is subjected to complex forces. Moreover, the damage and chuck accidents of floating roofs occur occasionally. Therefore, studying the mechanical characteristics of the floating roof equipped with the elastic compensation seal is of great significance for ensuring the safe operation of the floating roof. [Methods] A tank sealing efficiency testing platform was built to measure the force feedback of elastic compensation seals on floating roof under different annular gaps. Based on finite element analysis (FEA) method, a FEA model of the double-deck floating roof for 5×10⁴ m³ storage tank was established. The stress and deformation distribution on the floating roof under normal operation, tank wall deformation, and extreme chuck conditions were calculated. Additionally, the stress concentration region and weak area under varied conditions were analyzed. [Results] With the decrease of annular gap, the compression degree of the seal increased, and the contact area between the seal and tank wall gradually moved upward, resulting in a significant increase in friction force. During normal operation, the maximum Mises stress was located at the trusses and concentrated at the connection area of the bottom beam and reinforcing ribs. When the tank wall underwent elliptical or local deformation, the deformation of the floating roof increased at the blockage. When the average frictional force acting on the floating roof was close, the local deformation of storage tank was more likely to cause the chuck and instability of floating roof as compared to the elliptical deformation. When the floating roof was chucked, the maximum Mises stress increased significantly. And the local stress even exceeded the allowable value and led to strength failure under extreme conditions. [Conclusion] For oil storage tanks that suffered deformation, when installing or upgrading efficient seals, mechanical performance evaluations of the floating roof should be carried out to ensure the safe operation of the floating roof storage tank.

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更新日期/Last Update: 2024-10-21