位移谐波激励下拱顶锚固储罐的动力响应分析
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摘要
地震中拱顶锚固储罐的破坏将造成严重的后果,研究其地震作用下的动力响应特性具有一定工程意义。以位移简谐波为水平激励,运用AD INA有限元软件对一座3 000m3的拱顶锚固储罐模型进行动力数值模拟,系统分析了储罐内液面晃动波高、动水压力极值、罐壁应力、拱顶应力、拱顶位移等动力响应结果,将以位移谐波激励和以加速度谐波激励的储罐动力响应结果进行比较。分析表明,位移谐波激励下拱顶锚固储罐的液面晃动波高受场地影响较大;储罐应力分布具有一定规律性;采用位移谐波激励时其应力、位移和动水压力等较采用加速度谐波激励时大,液体晃动波高较小。
Seismic disasters are indicated that damage of tanks under strong earthquake would result in serious consequences,so it is particularly important for studying the seismic performance of tanks.The dynamic response of a vault-anchored tank subjected to horizontal displacement harmonic excitation is investigated.Finite elements models of a 3 000m3 cone roof tank are used to the study.The vault-anchored tank is analyzed under the displacement excitation of harmonic waves,dynamic response analysis of the tank is achieved.Besides the comparative analyses of the tank under the both displacemet and acceleration excitation are made.The dynamic response analyses show that liquid sloshing wave height of the tank is influenced by ground site obviously,the stress distributions of the tank have a certain regularity.The comparison between response results under the displacement excitation and the acceleration excitation show that the stress,the displacement and the dynamic water pressure are larger and the liquid sloshing wave height is lower for the displacement excitation.
Seismic disasters are indicated that damage of tanks under strong earthquake would result in serious consequences,so it is particularly important for studying the seismic performance of tanks.The dynamic response of a vault-anchored tank subjected to horizontal displacement harmonic excitation is investigated.Finite elements models of a 3 000m3 cone roof tank are used to the study.The vault-anchored tank is analyzed under the displacement excitation of harmonic waves,dynamic response analysis of the tank is achieved.Besides the comparative analyses of the tank under the both displacemet and acceleration excitation are made.The dynamic response analyses show that liquid sloshing wave height of the tank is influenced by ground site obviously,the stress distributions of the tank have a certain regularity.The comparison between response results under the displacement excitation and the acceleration excitation show that the stress,the displacement and the dynamic water pressure are larger and the liquid sloshing wave height is lower for the displacement excitation.
引文
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[2]Nachtigal L,Gebbeken N,Urmtia-Galicia J S.On the analysis of vertical circular cylindrical tanks under earthquake excitation at its base[J].Engi-neering Structures,2003,25(2):201-213.
[3]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,2009.Sun Jiangang.Isolation of Large Vertical Storage Tank——Theory,Method,Test[M].Beijing:Science Press,2009.
[4]秦小勇.储液罐静力与动力响应有限元数值分析[D].大连理工大学,2002.Qin Xiaoyong.Finite element numerical computations of static analysis and seismic response analysis of cylindrical liquid storage tanks[D].Dalian:Dalian University of Technology,2002.
[5]刘焕忠,李青,庄茁.发展附加质量模型应用于储液罐的动力分析[J].工程力学,2005,22(6):161-170.Liu Huanzhong,Li Qing,Zhuang Zhuo.Development of added mass model and application to dynamic analysis of cylindrical tanks[J].Engineer-ing Mechanics,2005,22(6):161-170.
[6]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.Zheng Tianxin,Wang Wei,Wu Lingyu.Analysis of seismic response of liquid-storage elevated tank involving fluid sloshing and the uplift of tankbottom[J].Journal of Harbin Institute of Technology,2007,39(2):173-176.
[7]范喜哲,郑天心,王伟,等.地震作用下立式储液罐罐壁”象足”变形仿真分析[J].地震工程与工程振动,2007,27(3):104-109.Fan Xizhe,Zheng Tianxin,Wang Wei,et al.Numerical analysis of elephant foot bulging for elevated liquid-storage tank under seismic ground mo-tion[J].Journal of Earthquake Engineering and Engineering Vibratiion,2007,27(3):104-109.
[8]吴志平.拱顶锚固储罐谐波动力响应及动力屈曲分析[D].大庆:大庆石油学院,2009.Wu Zhiping.Analysis of harmonic dynamic response and dynamic buckling of vault anchorage tank[D].Daqing:Daqing Petroleum Institute,2009.
[9]帅健,于桂杰.管道及储罐强度设计[M].北京:石油工业出版社,2006.Shuai Jian,Yu Guijle.Strength Design of Pipelines and Storage Tanks[M].Beijing:Petroleum Industry Press,2006.
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