基于不同模型数据映射的储液罐抗震性能研究
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摘要
在采用有限元方法对大型非锚固储液罐的地震响应进行数值仿真时,通常采用壳单元来剖分储罐.然而壳单元无法描述应力集中情况,在罐底板发生提离时,罐脚焊缝处应力分布复杂且易产生应力集中,该处的计算结果失真.为此,提出运用等参元的逆变换算法实现不同网格间的数据映射,将壳单元模型的动力时程分析结果导入到实体单元模型,实现对角焊缝处的应力分析.通过对某实际储液罐两个模型的仿真计算,证明了该方法的有效性,为分析储液罐角焊缝的应力集中现象提供了一种可行方法.
When finite element method is used to numerically simulate the seismic response of a large unanchored liquid storage tank,the tank is usually divided by shell elements.However,due to shell element cannot describe stress concentration,the calculated results about the stress distribution for the weld at the bottom of the tank are distorted when the base plate uplifting happens,which may result in stress complexity and concentration phenomenon,during the earthquake.For this reason,we propose to realize data mapping between different grids by inverse isoparametric mapping method,which means importing the results of shell element model by dynamic time-history analysis into solid element model,so as to implement stress analysis for the weld.Through a comparative simulation between two models,this method is proved to be effective,so as to provide a feasible approach to analyze stress concentration phenomenon at weld of liquid storage tanks.
引文
[1]Murti V,Valliappan S.Numerical inverse isoparametric mapping in remeshing and nodal quantity continuing[J].Computers&Structures,1986,26:1011-1021.
    [2]钱向东,任青文,赵引.一种高效的等参有限元逆变换算法[J].计算力学学报,1998,15(4):437-441.
    [3]朱以文,李伟,蔡元奇.基于解析性质的等参有限元逆变换高效算法[J].武汉大学学报(工学版),2002,35(2):62-65.
    [4]徐燕萍,项阳,刘泉声,等.等参元逆变换插值法的研究及其应用[J].岩土力学,2001,22(2):226-228.
    [5]罗先启,葛修润,车爱兰.等参逆变换法及其在地下厂房原始地应力计算中的应用[J].长江科学院院报,2008,25(2):51-53,57.
    [6]单明康,张文福,王向英.刚性和柔性储液罐简化模型仿真分析[J].压力容器,2014,31(1):27-33.
    [7]方浩,吴昊,王笃国,等.储液罐地震安全问题研究综述[J].震灾防御技术,2012,7(2):144-151.
    [8]Masoud Nourali Ahari,Sassan Eshghi,Mohsen Ghafory Ashtiany.The tapered beam model for bottom plate uplift analysis of unanchored cylindrical steel storage tanks[J].Engineering Structures,2009,31(3):623-632.
    [9]方舟,陈志平,刘德宇.地震激励下储液罐提离动态响应试验研究[J].压力容器,2013,30(11):14-22,61.
    [10]晏顺娟.水平地震激励下非锚固浮顶模型罐动力响应实验研究[D].浙江:浙江大学,2012:25-81.
    [11]Hideyuld Tazuke,Satoru Yamaguchi,Kazuo Ishida,et al.Seismic proving test of equipment and structures in thermal conventional power plant[J].Pressure Vessel Technology,2002,124(5):133-143.
    [12]Zdemir Z O,Souli M,Fahjan Y M.Application of nonlinear fluid-structure interaction methods to seismic analysis of anchored and unanchored tanks[J].Engineering Structures,2010,32(2):409-423.
    [13]郑建华,李金光,唐辉永.立式圆柱形储液罐的三维液固耦合模态分析[J].化工设计,2012,22(1):25-27.
    [14]郑天心,王伟,吴灵宇.考虑液体晃动和罐底提离储液罐的研究[J].哈尔滨工业大学学报,2007,39(2):173-176.
    [15]孙建刚,周利剑,李晓莉,等.水平地震激励下储罐液体晃动与提离分析[J].地震工程与工程振动,2007,27(5):134-138.
    [16]American Petroleum Institute.API-650-2009 Welded Steel Tanks for Oil Storage[S].Washington,DC:American Polymers Inc,2009.

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