大型浮顶油罐应力测试及数值模拟
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摘要
10×104m3浮顶油罐是我国目前广泛采用的大型储油设施,为获得关键部位的应力分布情况,并检验设计的合理性和运行的安全性,对其进行现场充水应力测试并进行有限元模拟计算。采用电测法,将振弦式应变计与电阻应变片结合使用。测试结果表明:罐体在水深为20.2m工况下达到最大工作应力,最大环向应力出现在罐壁3#板上部和4#板下部,测试值与模拟计算值基本一致。按分析设计标准对油罐进行评定,结果表明:该油罐设计合理,在正常操作条件下应力水平完全满足强度要求。测试方法及结果可为今后10×104m3及更大体积油罐的设计和测试提供参考。(表3,图6,参13)
Capacity at 10×104 m3 floating roof oil tank is a kind of large-scale oil storage device used widely in China. To obtain stress distribution in key positions and check design rationality and operation safety, the field water filling stress test and finite element simulation calculation are carried out. The electrometric method is used through the combination of vibrating wire strain gauge and resistance strain gauge. As shown from the test results, the tank body reaches the maximum working pressure at the depth of 20.2 m, maximum circumferential stress occurs on the No.3 plate and below the No.4 plate of tank wall and testing value is basically consistent with the simulated calculation value. The oil tank is evaluated based on analysis design standard to show the oil tank is reasonably designed and its stress level can fully meet strength requirements under normal operating conditions. Testing methods and results can provide a reference to the design and testing of future 10×10 4m3 and larger oil tanks. (3 Tables, 6 Figures, 13 References)
Capacity at 10×104 m3 floating roof oil tank is a kind of large-scale oil storage device used widely in China. To obtain stress distribution in key positions and check design rationality and operation safety, the field water filling stress test and finite element simulation calculation are carried out. The electrometric method is used through the combination of vibrating wire strain gauge and resistance strain gauge. As shown from the test results, the tank body reaches the maximum working pressure at the depth of 20.2 m, maximum circumferential stress occurs on the No.3 plate and below the No.4 plate of tank wall and testing value is basically consistent with the simulated calculation value. The oil tank is evaluated based on analysis design standard to show the oil tank is reasonably designed and its stress level can fully meet strength requirements under normal operating conditions. Testing methods and results can provide a reference to the design and testing of future 10×10 4m3 and larger oil tanks. (3 Tables, 6 Figures, 13 References)
引文
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Du Guofeng，Xu Chenxiang，Jia Shanpo. Study on damage performance of oil storage tank in the basis of modal test and FEA[J]. Advanced Materials Research，2010，163：2 507-2 510.
Wang Jinlong. Simulation study of the oil tank under seismic loads[J]. Advanced Materials Research，2011，368：1 014-1 017.
高威，隋明璋，黄开佳.大型原油储罐技术综述[J]. 石油化工设备，2000，29(5)：28-31.
张泽盛，王日新，孟昭寅.地震作用下石油储罐浮顶强度及稳定性分析[J]. 天津大学学报，2000，33(6)：736-739.
李长升，项忠权，丁景运.软土地基上储油罐的抗震设计[J].天津大学学报，2001，34(5)：577-581.
陈志平，曾明，余雏麟，等.大型油罐应力分析与屈曲稳定性研究[J].油气储运，2008，27(12)：7-12，46.
白生虎，陈志平，武铜柱，等. 15×104 m3国产钢板浮顶油罐应力测试分析[J]. 石油化工设备技术，2010，31(1)：5-8.
应宏伟，杨晓刚，卞守中，等.大型油罐地基现场试验分析[J]. 岩土工程学报， 2005，27(2)：157-161.
Chen Z P, Duan Y Y, Shen J M. A simplified method for calculating the stress of a large storage tank wall[J]. Journal of Process Mechanical Engineering, 2007, 221(3)： 119-127.
Wu T. More accurate method devised for tank-bottom annular plate design[J]. Oil and Gas Journal，1996，94(21)：81-83.
Wu T Y,Liu G R.Comparison of design methods for a tank-bottom annular plate and concrete ringwall[J]. International Journal of Pressure Vessels and Piping，2000，77(9)：511-517.
卢伟升，陈常松，涂光亚，等.振弦式应变传感器的温度影响修正[J].传感器与微系统，2006，25(8)：49-51.
Du Guofeng，Xu Chenxiang，Jia Shanpo. Study on damage performance of oil storage tank in the basis of modal test and FEA[J]. Advanced Materials Research，2010，163：2 507-2 510.
Wang Jinlong. Simulation study of the oil tank under seismic loads[J]. Advanced Materials Research，2011，368：1 014-1 017.
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