钢筋混凝土水塔流固耦合动力响应分析
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摘要
针对某实际工程,研究了塔体结构与水体的流固耦合力学模型。建立了考虑流固耦合作用的水塔结构力学分析有限元模型,采用ANSYS软件对水塔自振频率特性和地震时程反应下的位移响应进行了计算分析。计算结果表明:水体的晃动会影响结构的自振频率;水塔自身刚度愈大,动水压力对频率影响愈小;水塔储水深度增大,自振频率下降较快。水体的晃动可以减小地震影响下的塔体的位移反应。
For an engineering practice,the fluid-structure interaction mechanical model is studied.A finite element model of a reinforced concrete water tower considering fluid-structure interaction is established.The natural frequency of the coupling system and the displacement of the time-history seismic response analysis are studied by software ANSYS.The solutions demonstrate that the liquid sloshing could affect natural frequency of the structure;the stiffness of water tower is stronger,the effect of hydrodynamic pressure is weaker;the depth of water is deeper,the natural frequency decreases more quickly.The sloshing of water in the tower can effectively reduce the seismic displacement response of tower structure.
For an engineering practice,the fluid-structure interaction mechanical model is studied.A finite element model of a reinforced concrete water tower considering fluid-structure interaction is established.The natural frequency of the coupling system and the displacement of the time-history seismic response analysis are studied by software ANSYS.The solutions demonstrate that the liquid sloshing could affect natural frequency of the structure;the stiffness of water tower is stronger,the effect of hydrodynamic pressure is weaker;the depth of water is deeper,the natural frequency decreases more quickly.The sloshing of water in the tower can effectively reduce the seismic displacement response of tower structure.
引文
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[2]Housner G W.The Dynamic Behavior of Water Tanks[J].Bull.Seism. Soc.AM.,1963,53(2):381 - 387
[3]Abramson H N.The Dynamic Behavior of Liquid in Moving Containers [R].Report SP 106 of NASA,1996
[4]Chen W,Haroun M A,Liu F.Large Amplitude liquid Sloshing in Seismically Excited TanksC[J].Earthquake Engineering and Structural Dynamics,1996,25:653 - 669
[5]Ma Q W,Wu G X,Eatock Taylor R.Finite Element Analysis of the Non-Linear Transient Waves in Three Dimensional Long Tank[C]// 12~(th) International Workshop on Water Waves and Floating Bodies.Carryle -Rouet,France:1997
[6]Okamoto T,Kawahara M.Two—Dimensional Sloshing Analysis by Lagrangian Finite Element Method[J].International Journal for Numerical Methods in Fluids,1990,11;453 - 477
[7]许洋,党沙沙,胡仁喜等.ANSYS 11.0/FLOTRAN流场分析[M].机械工业出版社,1983
[8]徐刚,任文敏,张维等.储液容器的三维流固耦合动力特性分析[J].力学学报,2004,36(3):328-334
[9]盛宏玉.结构动力学[M].合肥工业大学出版社,2005
[10]王晖,程刚,张伟等.储液容器三维流固耦合模态分析[J].特种结构,2010,24(2):52-54
[11]居荣初,曾心专.弹性结构与液体的耦联振动理论[M].地震出版社,2009
[12]尚春雨,张海军,赵建国.考虑水体晃动作用时椭球型水塔的地震反应分析[J].钢结构,2010,25(1):15-20
[2]Housner G W.The Dynamic Behavior of Water Tanks[J].Bull.Seism. Soc.AM.,1963,53(2):381 - 387
[3]Abramson H N.The Dynamic Behavior of Liquid in Moving Containers [R].Report SP 106 of NASA,1996
[4]Chen W,Haroun M A,Liu F.Large Amplitude liquid Sloshing in Seismically Excited TanksC[J].Earthquake Engineering and Structural Dynamics,1996,25:653 - 669
[5]Ma Q W,Wu G X,Eatock Taylor R.Finite Element Analysis of the Non-Linear Transient Waves in Three Dimensional Long Tank[C]// 12~(th) International Workshop on Water Waves and Floating Bodies.Carryle -Rouet,France:1997
[6]Okamoto T,Kawahara M.Two—Dimensional Sloshing Analysis by Lagrangian Finite Element Method[J].International Journal for Numerical Methods in Fluids,1990,11;453 - 477
[7]许洋,党沙沙,胡仁喜等.ANSYS 11.0/FLOTRAN流场分析[M].机械工业出版社,1983
[8]徐刚,任文敏,张维等.储液容器的三维流固耦合动力特性分析[J].力学学报,2004,36(3):328-334
[9]盛宏玉.结构动力学[M].合肥工业大学出版社,2005
[10]王晖,程刚,张伟等.储液容器三维流固耦合模态分析[J].特种结构,2010,24(2):52-54
[11]居荣初,曾心专.弹性结构与液体的耦联振动理论[M].地震出版社,2009
[12]尚春雨,张海军,赵建国.考虑水体晃动作用时椭球型水塔的地震反应分析[J].钢结构,2010,25(1):15-20
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