坝体—库水相互作用的流固耦合分析
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摘要
采用Ansys中的声学流体单元模拟库水,进行了某重力坝与库水的流固耦合分析。考虑了库底吸收系数对坝库耦合系统动力响应的影响,计算结果表明:库底吸收性显著降低了动水压力,吸收系数越大,效果越明显;位移反应也有所减小。比较了Ansys与Adina的计算结果及效率,结果表明:两者的计算结果基本一致,Adina的计算效率高于Ansys,但Ansys的前后处理较Adina高效。
Fluid-solid coupling analysis was carried out for a gravity dam and reservoir,the reservoir was simulated by acoustic fluid element in Ansys.The influence of reservoir-bottom absorption coefficient to dynamic response of dam-reservoir coupling system was considered.The results show that the absorption capability reduces the hydrodynamic pressure significantly.The bigger the absorption coefficient,the more obvious the effect is,and the displacement response also decreases slightly.The computational results and efficiency were compared between Ansys and Adina.They both have accordant computational results.The computational efficiency of Adina is higher than Ansys,but Ansys has higher efficiency in pre-processing and post-processing.
Fluid-solid coupling analysis was carried out for a gravity dam and reservoir,the reservoir was simulated by acoustic fluid element in Ansys.The influence of reservoir-bottom absorption coefficient to dynamic response of dam-reservoir coupling system was considered.The results show that the absorption capability reduces the hydrodynamic pressure significantly.The bigger the absorption coefficient,the more obvious the effect is,and the displacement response also decreases slightly.The computational results and efficiency were compared between Ansys and Adina.They both have accordant computational results.The computational efficiency of Adina is higher than Ansys,but Ansys has higher efficiency in pre-processing and post-processing.
引文
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[16]邢景棠,周盛,崔尔杰.流固耦合力学概述[J].力学进展,1997,27(1):19~38.XING Jing-tang,ZHOU Sheng,CUI Er-jie.A Survey on the Fluid-solid Interaction Mechanics[J].Advances in Mechanics,1997,27(1):19~38.(in Chinese)
[17]王忠.坝库相互作用及抗震技术研究[D].四川:四川大学,2005.WANG Zhong.Research of Dam-reservoir Interaction and Dam Isolations[D].Sichuan:Sichuan University,2001.(in Chi-nese)
[18]Theory and Modeling Guide Volumn I:ADINASolids&Structures.Report ARD 05-7,2005[R].USA:ADINAR&D,2005.
[2]Bathe,K.J.,W.F.Hahn.On Transient Analysis of Fluid-structure Systems[J].Computers&Structures,1979,10:383~391.
[3]Akkas,N.,H.U.Akay,C.Yilmaz.Applicability of General Purpose Finite Element Programs in Solid-fluid InteractionProblems[J].Computers&Structures,1979,10:773~783.
[4]Wilson,E.L.,M.Khalvati.Finite Elements for Dynamic Analysis of Fluid-solid Systems[J].International Journal for Nu-merical Methods in Engineering,1983,19:1657~1668.
[5]LIU W.K.,CHANG H.G.A Method for Computation for Fluid Structure Interaction[J].Computers&Structures,1985,20:311~320.
[6]Akk嵀se,Mehmet,et al.Elasto-plastic Earthquake Response of Arch Dams Including Fluid-structure Interaction by the La-grangian Approach[J].Applied Mathematical Modelling,2008,32:2396~2412.
[7]Zienkiewicz,O.C.,P.Bettess.Fluid-structure Dynamic Interaction and Wave Forces.An Introduction to Numerical Treat-ment[J].International Journal for Numerical Methods in Engineering,1978,13:1~16.
[8]吴一红,谢省宗.水工结构流固耦合动力特性分析[J].水利学报,1995,(1):27~34.WU Yi-hong,XIE Sheng-zong.Dynamic Characteristic Analysis of Interaction of Fluid and Hydraulic Structures[J].Journal ofHydraulic Engineering,1995,(1):27~34.(in Chinese)
[9]王忠,晏启祥,刘浩吾.库底反射性边界条件与地震动水压力分析[J].四川大学学报(工程科学版),2002,34(1):36~39.WANG Zhong,YAN Qi-xing,LIUHao-wu.Reflectional Boundary Condition on Reservoir Bottom and Analysis of Hydrodynam-ics[J].Journal of Sichuan University(Engineering science edition),2002,34(1):36~39.(in Chinese)
[10]王冰,叶天麒.刚体撞水非线性响应的边界元分析[J].固体力学学报,1999,20(2):182~186.WANG Bin,YE Tian-qi.A Boundary Element Method for Nonlinear Slamming Analysis[J].Acta Mechanica Solida Sinica,1999,20(2):182~186.(in Chinese)
[11]Azna′rez,J.J.,O.Maeso,J.Dom?′nguez.BE Analysis of Bottom Sediments in Dynamic Fluid-Structure Interaction Prob-lems[J].2006,30:124~136.
[12]楚锡华,李锡夔.含液颗粒材料液固耦合分析的离散颗粒模型及特征线SPH法[J].计算力学学报,2007,24(6):719~726.CHU Xi-hua,LI Xi-kui.A Discrete Particle Model and Characteristic Based SPHMethod for Fluid-solid Interaction of Granu-lar Materials Filled with Liquids[J].Chinese Journal of Computational Mechanics,2007,24(6):719~726.(in Chinese)
[13]张丹才,章艺,童宗鹏,等.舵翼结构对水下航行器尾部振动声辐射的影响[J].振动与冲击,2006,25(5):102~106.ZHANG Dan-cai,ZHANG Yi,TONG Zong-peng,et al.Research on the Sound Radiation of the Stern of Submarine with Rud-der and Vane[J].Journal of Vibration and Shock,2006,25(5):102~106.(in Chinese)
[14]纪刚,张纬康,周其斗.有限元/边界元法求解多连通域声辐射问题[J].水动力学研究与进展A辑,2003,18(4):408~413.JI Gang,ZHANG Wei-kang,ZHOUQi-dou.Analysis of Acoustic Radiation in Multiply Connected Domain by FEM/BEM[J]..Journal of Hydrodynamics Ser.A,2003,18(4):408~413.(in Chinese)
[15]杜庆华,吴有生,冯振兴.流固耦合振动问题的某些工程处理方法[J].固体力学学报,1988,9(1):49~61.DU Qing-hua,WU You-sheng,FENG Zhen-xing.Some Engineering Approaches to the Fluid-structure Dynamic InteractionProblems[J].Acta Mechanica Solida Sinica,1988,9(1):49~61.(in Chinese)
[16]邢景棠,周盛,崔尔杰.流固耦合力学概述[J].力学进展,1997,27(1):19~38.XING Jing-tang,ZHOU Sheng,CUI Er-jie.A Survey on the Fluid-solid Interaction Mechanics[J].Advances in Mechanics,1997,27(1):19~38.(in Chinese)
[17]王忠.坝库相互作用及抗震技术研究[D].四川:四川大学,2005.WANG Zhong.Research of Dam-reservoir Interaction and Dam Isolations[D].Sichuan:Sichuan University,2001.(in Chi-nese)
[18]Theory and Modeling Guide Volumn I:ADINASolids&Structures.Report ARD 05-7,2005[R].USA:ADINAR&D,2005.
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