为了避免因液体晃动过大而引起的储罐“象足”型失稳破坏，采用减晃板作为抑晃装置并对其进行了减晃优化设计。分别采用缩尺模型试验(缩尺比1:30)和有限元分析等手段对有、无安装减晃板的储罐内的液体晃动波高、罐底剪力及罐壁压应力等关键指标进行了实测和仿真模拟。研究结果表明：关键指标的模拟值与实测值较为接近，进而验证了储罐减晃有限元分析的可靠性；当减晃板在距液面0.125~0.225倍的储罐高度且其宽度在0.15倍的储罐半径附近时，减晃板对储液晃动波高、罐底剪力及罐壁压应力都具有较好的抑制效果；减晃优化设计后，“象足”失稳区(接近罐底处)的罐壁压应力峰值得到了较为显著的抑制。
Abstract
Focusing on the suppression of liquid sloshing which may cause the elephant-foot buckling of storage tank walls,ring baffles were taken as a suppression device and its optimization design was carried out. An experimental research and a finite element analysis were performed on a 1∶30 reduced-scale model. By using the model with or without baffles,the wave height,base shear force and tank wall pressure in both cases were investigated and compared. The reliability of the finite element simulation was verified by comparing the numerical results with the experimental ones. The study shows when the distance from liquid surface to the location of baffles relative to tank height is 0.125-0.225 and the baffle width relative to tank radius is near 0.15,the effect on suppressing wave is the most remarkable,additionally,near the bottom of tank,the stress reaches the maximum peak,which indicates the bottom region is just the elephant-foot buckling area. Thsi is of guiding significance for preventing failures.
关键词
立式储罐 /
地震激励 /
减晃板 /
模型试验 /
有限元
{{custom_keyword}} /
Key words
vertical storage tank /
seismic excitation /
ring baffles /
model experiment /
finite element
{{custom_keyword}} /
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] GB50341-2014立式圆筒形钢制焊接油罐设计规范[S].北京：中国计划出版社，2014:82-83.
GB50341-2003 Code for design of vertical cylindrical welded steel oil tanks[S]. Beijing: China planning press,2014:82-83.(In Chinese)
[2]Hasheminejad, S.M.and M. Aghabeigi, Sloshing characteristics in half-full horizontal elliptical tanks with vertical baffles[J]. Applied Mathematical Modelling, 2012. 36(1): 57-71.
[3]Eswaran M, Saha U K, Maity D. Effect of baffles on a partially filled cubic tank: numerical
simulation and experimental validation[J].
Comput Struct,2009，87:198-205.
[4]王佳栋,周叮,刘伟庆. 水平激励下带环形刚性隔板圆柱形储液罐中流体的晃动响应[J]. 力学季刊,2011,32(2):166-172.
WANG Jia-dong, ZHOU Ding, LIU Wei-qing. Sloshing Response of Liquid in Cylindrical Tank with a RigidAnnual Baffle Under HorizontalLoads[J].Chinese Quarterly of Mechanics,2011,32(2):166-172.
[5]Biswal, K.C., S.K. Bhattacharyya and P.K. Sinha, Non-linear sloshing in partially liquid filled containers with baffles[J]. International Journal for Numerical Methods in Engineering, 2006. 68(3): 317-337.
[6]柳伟，周叮，刘伟庆等. 基于概率密度演化的带有环形隔板圆柱形罐体中流体的晃动研究[J].振动与冲击，2015,34(11):110-115.
LIU Wei, ZHOU Ding, LIU Wei-qing etl.Sloshing response of liquid in a cylindrical tank with an annual baffle based on probability density evolution theory[J].Journal of Vibration and Shock,2015,34(11):110-115.
[7]Akyildiz, H., N. ErdemÜnal and H. Aksoy, An experimental investigation of the effects of the ring baffles on liquid sloshing in a rigid cylindrical tank[J]. Ocean Engineering, 2013. 59: 190-197.
[8]Akyildiz H, Unal N E. Experimental investigation of pressure distribution on a rectangular tank due to the liquid sloshing. Ocean Engineering, 2005, 32(11-12)：1503-1516.
[9]Akyildiz H, Unal N E. Sloshing in athree-dimensional rectangular tank：Numerical simulation and experimental validation. Ocean Engineering, 2006, 33(16)：2135-2149.
[10] 孙建刚. 大型立式储罐隔震—理论、方法及实验[M].北京：科学出版社，2010:214-215.
SUN Jian-gang. Isolation of large vertical storage tank-theory,method,test[M].Beijing:Science press,2010:214-215.
[11]李扬. 基础隔震储罐地震反应与控制研究[D].青岛：中国石油大学（华东），2009:1-2.
LI Yang.Study on the seismic response control of
base-isolated liquid storage tanks[D].Qingdao,
China university of petroleum,2009:1-2
[12] 马野，袁志丹，曹金凤.ADINA有限元经典实例分析[M].北京：机械工业出版社，2011．
MA Ye, YUAN Zhi-dan,CAO，Jin-feng. ADINA classic cases analysis of finite element[M].Beijing:China Machine Press,2011.
[13] Housner G. W. Dynamic Pressure on accelerated fluidcontainers[J]. Bulletin of seismological society of America,1957,47(1):15-35.
{{custom_fnGroup.title_cn}}
脚注
{{custom_fn.content}}
PDF(2675 KB)
