南水北调中线漕河渡槽结构地震动力特性研究
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摘要
通过对结构与理想流体耦合问题的分析,采用迦辽金法推导了具有压缩性流体与固体流固耦合问题的动力有限元分析模型,模型考虑了流固耦合问题的附连水质量问题;结合渡槽所在地地震烈度特点,计算了南水北调中线漕河渡槽结构的地震反应。在计算结果分析的基础上,研究表明随着水位的上升,渡槽结构地震反应增大,说明槽身与水体的相互耦合对渡槽结构地震反应是有影响,会引起结构应力、变形的改变。计算成果有利于指导施工和运行期安全监测与管理。
Analyzed the coupling problems between structure and ideal fluid,a dynamic FEM model for the fluid-solid interaction which considers the mass of adhering water was established by using Galerkin method;considered the earthquake intensity in location of the aqueduct,its seismic response was calculated for the south-to-north water diversion project.The calculated results show that the seismic response of the aqueduct structure increases with the rise of water level,and the fluid-solid interaction influences on the seismic response of the aqueduct structure greatly.The calculated result provides a helpful instruction for the aqueduct construction,management and safety monitoring.
Analyzed the coupling problems between structure and ideal fluid,a dynamic FEM model for the fluid-solid interaction which considers the mass of adhering water was established by using Galerkin method;considered the earthquake intensity in location of the aqueduct,its seismic response was calculated for the south-to-north water diversion project.The calculated results show that the seismic response of the aqueduct structure increases with the rise of water level,and the fluid-solid interaction influences on the seismic response of the aqueduct structure greatly.The calculated result provides a helpful instruction for the aqueduct construction,management and safety monitoring.
引文
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[4]Alfredo B,Rodolfo R,Rodriguez R.Finite element solution of incom-pressible fluid-strucure vibration problems[J].International Journalfor Numerical Method in Engineering,1997,15(2):40-42.
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[6]戴大农,王勖成,杜庆华.流固耦合系统动力响应的模态分析理论[J].固体力学学报,1990,11(4):305-312.DAI Da-nong,WANG Xu-cheng,DUQing-hua.Amodal analysis forthe dynamic response of fluid-structure systems[J].Acta MechanicaSolida Sinica,1990,11(4):305-312.(in Chinese)
[7]金占礼,王宗利.结构在无限流域中振动时附连水质量的数值计算方法[J].上海交通大学学报,2000,34(8):1078-1082.JIN Zhan-li,WANG Zong-li.Numerical computing method of addi-tional water mass when the structure vibrates in the infinite liquid[J].Journal of Shanghai Jiaotong University,2000,34(8):1078-1082.(in Chinese)
[8]王勖成.有限单元法[M].北京:清华大学出版社,2003.WANG Xu-cheng.The finite element method[M].Beijing:TsinghuaUniversity Press,2003.(in Chinese)
[9]王博,陈淮,徐伟,等.考虑槽身与槽内水体流固耦合的渡槽地震反应计算[J].水利水电科技进展,2005,25(3):5-7.WANG Bo,CHEN Huai,XU Wei.Seismic response analysis of aq-ueducts with consideration of fluid-solid coupling[J].Advances inScience and Technology of Water Resources,2005,25(3):5-7.(in Chinese)
[2]陆鑫森.高等结构动力学[M].上海:上海交通大学出版社,1992.LUXin-sen.Advanced structural dynamics[M].Shanghai:Shang-hai Jiaotong University Press,1992.(in Chinese)
[3]Alfredo B,Rodolfo R.Finite element computation of the vibrationmodes of a fluid-solid system[J].Comput Methods,Appl Mesh Eu-grg,1994,9(2):119-120.
[4]Alfredo B,Rodolfo R,Rodriguez R.Finite element solution of incom-pressible fluid-strucure vibration problems[J].International Journalfor Numerical Method in Engineering,1997,15(2):40-42.
[5]Liu W K,Chang HG.Multidisciplinary and interaction problems:amethod of computation for fluid structure interaction[J].Computer&Structure,1985,5(1):20:1-3.
[6]戴大农,王勖成,杜庆华.流固耦合系统动力响应的模态分析理论[J].固体力学学报,1990,11(4):305-312.DAI Da-nong,WANG Xu-cheng,DUQing-hua.Amodal analysis forthe dynamic response of fluid-structure systems[J].Acta MechanicaSolida Sinica,1990,11(4):305-312.(in Chinese)
[7]金占礼,王宗利.结构在无限流域中振动时附连水质量的数值计算方法[J].上海交通大学学报,2000,34(8):1078-1082.JIN Zhan-li,WANG Zong-li.Numerical computing method of addi-tional water mass when the structure vibrates in the infinite liquid[J].Journal of Shanghai Jiaotong University,2000,34(8):1078-1082.(in Chinese)
[8]王勖成.有限单元法[M].北京:清华大学出版社,2003.WANG Xu-cheng.The finite element method[M].Beijing:TsinghuaUniversity Press,2003.(in Chinese)
[9]王博,陈淮,徐伟,等.考虑槽身与槽内水体流固耦合的渡槽地震反应计算[J].水利水电科技进展,2005,25(3):5-7.WANG Bo,CHEN Huai,XU Wei.Seismic response analysis of aq-ueducts with consideration of fluid-solid coupling[J].Advances inScience and Technology of Water Resources,2005,25(3):5-7.(in Chinese)
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