强耦合法在膜结构风振流固耦合分析中的程序实现与应用
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摘要
研究强耦合整体方法在膜结构风振流固耦合效应分析中的程序实现与应用。基于强耦合整体式方程,介绍了采用Fortran语言编写膜结构流固耦合效应计算程序的实现过程,以及程序实现中需要的数值计算方法。对计算程序中的重要求解步骤进行了分析,介绍了相应程序的实现过程。最后将强耦合整体方法计算程序应用于典型膜结构的风振流固耦合计算中,得到了结构在不同风向角下考虑和不考虑耦合效应时的风压系数,其结果与已有风洞试验结果基本一致。同时计算了膜结构的风振响应和周围流场的分布。结果证明所提出的强耦合整体方法程序适用于计算膜结构风振中的流固耦合效应,结果正确可靠。
Based on strongly coupled simultaneous equations,the programming of calculating fluid-structure interaction in wind-induced vibration of membrane structures was implemented by using Fortran language and the numerical methods needed in the program were presented.Then the program was applied in the calculation of fluid-structure interaction in wind-induced vibration of a typical membrane structure.Wind pressure coefficients were computed with considering and without considering interaction effects under different wind azimuths,respectively.The results are in good agreement with those obtained from the existing wind tunnel test data.Meanwhile,wind-induced responses and flow distribution around the membrane structure were computed as well.It is shown that the presented strongly coupling method and the corresponding program are valid and accurate in fluid-structure interaction analysis on wind-induced vibration of membrane structures.
Based on strongly coupled simultaneous equations,the programming of calculating fluid-structure interaction in wind-induced vibration of membrane structures was implemented by using Fortran language and the numerical methods needed in the program were presented.Then the program was applied in the calculation of fluid-structure interaction in wind-induced vibration of a typical membrane structure.Wind pressure coefficients were computed with considering and without considering interaction effects under different wind azimuths,respectively.The results are in good agreement with those obtained from the existing wind tunnel test data.Meanwhile,wind-induced responses and flow distribution around the membrane structure were computed as well.It is shown that the presented strongly coupling method and the corresponding program are valid and accurate in fluid-structure interaction analysis on wind-induced vibration of membrane structures.
引文
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[3]Namkooong K,Choi H Yoo.Computation of dynamic fluid-structure interaction in two-dimensional laminar flows usingcombined formulation[J].Journal of Fluids and Strucutres,2005,20:51-69.
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[7]孙芳锦,张大明,殷志祥.大跨度柔性屋盖风振中流固耦合分析的强耦合方法[J].地震工程与工程振动,2009,29(2):179-183.
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[11]孙晓颖,武岳,沈世钊.鞍形屋盖平均风压分布特性的数值模拟[J].工程力学,2006,23(10):7-14.
[12]武岳,杨庆山,沈世钊.索膜结构风振气弹效应的风洞实验研究[J].工程力学,2008,25(1):8-15.
[2]Matthies H G,Staindorf J.Partitioned but strongly couplediteration schemes for nonlinear fluid-structure interaction[J].Computers&Structures,2002,80(27-30):1991-1999.
[3]Namkooong K,Choi H Yoo.Computation of dynamic fluid-structure interaction in two-dimensional laminar flows usingcombined formulation[J].Journal of Fluids and Strucutres,2005,20:51-69.
[4]Halfmann A,Rank E,Glck M,et al.Computationalengineering for wind-exposed thin-walled structures[J].Lecture Notes in Computational Science and Engineering,2002,21:63-70.
[5]Glck M,Breuer M,Durst F,et al.Computation of wind-induced vibrations of flexible shells and membranousstructures[J].J.of Fluids and Structures,2003,17:739-765.
[6]武岳.考虑流固耦合作用的索膜结构风致动力响应研究[D].哈尔滨:哈尔滨工业大学,2003.
[7]孙芳锦,张大明,殷志祥.大跨度柔性屋盖风振中流固耦合分析的强耦合方法[J].地震工程与工程振动,2009,29(2):179-183.
[8]The super convergent patch recovery and a posteriori errorestimates.Part 1:the recovery technique[J].InternationalJournal for Numerical methods in Engineering,1992,33:1331-1364.
[9]AIJ Recommendations for Loads on Buildings[S].EnglishVersion,Tokoy.Architectural Institute of Japan,2004.
[10]杨伟.基于RANS的结构风荷载和响应的数值模拟研究[D].上海:同济大学,2004.
[11]孙晓颖,武岳,沈世钊.鞍形屋盖平均风压分布特性的数值模拟[J].工程力学,2006,23(10):7-14.
[12]武岳,杨庆山,沈世钊.索膜结构风振气弹效应的风洞实验研究[J].工程力学,2008,25(1):8-15.
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