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时间:2019-08-01
《土-结构-流体动力相互作用的实时耦联动力试验》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、第31卷第12期岩土力学Vol.31No.122010年12月RockandSoilMechanicsDec.2010文章编号:1000-7598(2010)12-3765-06土-结构-流体动力相互作用的实时耦联动力试验迟福东,王进廷,金峰,汪强(清华大学水沙科学与水利水电工程国家重点实验室,北京100084)摘要:针对振动台试验中无限地基难以模拟和数值分析中流-固耦合作用难以计算两个难题,将最近发展的实时耦联动力试验方法引入土-结构-流体动力相互作用问题的研究。以一个渡槽结构为例,其中渡槽-水体作
2、为物理子结构,采用振动台进行物理试验,而无限地基作为数值子结构,采用集总参数模型进行数值模拟。两个子结构之间实时交换数据,联合评估整个耦合体系的动力响应。试验结果和有限元数值模拟结果吻合良好,表明该试验方法具有较高精度。对不同特性地基土进行的试验对比分析结果表明:对于软土地基,考虑土-结构相互作用(SSI)的结构反应幅值明显减小,周期延长;随着地基土变硬,SSI效应逐渐变弱,结构反应最终收敛至刚性地基解。关键词:土-结构-流体动力相互作用;实时耦联动力试验;渡槽结构;集总参数模型中图分类号:TU317
3、文献标识码:AReal-timedynamichybridtestingforsoil-structure-fluidinteractionanalysisCHIFu-dong,WANGJin-ting,JINFeng,WANGQiang(StateKeyLaboratoryofHydroscienceandHydraulicEngineering,TsinghuaUniversity,Beijing100084,China)Abstract:Intraditionalshakingtabletest
4、semi-infinitefoundationisdifficulttoconsider;whereasinnumericalsimulationdynamicfluid-structureinteractionishardtocalculate.Todealwiththetwodifficulties,anewlydevelopedreal-timedynamichybridtestingmethodisemployedtosolvethedynamicsoil-structure-fluidint
5、eractionproblems.Takinganaqueductforexample,theaqueduct-watersystem,calledexperimentalsubstructure,isphysicallytestedonashakingtable;whilethesemi-infinitefoundation,callednumericalsubstructure,isnumericallymodeledbyalumped-parametermodel.Thedataexchange
6、betweenthetwosubstructuresisperformedinreal-time;thusthedynamicresponseofthewholecoupledsystemcanbeevaluated.Meanwhile,thefiniteelementanalysisisalsoimplementedtosimulatethetestmodel.Thecomparisonofthetestedresultswiththoseobtainedfromthefiniteelementan
7、alysisdemonstratesthatthereal-timedynamichybridtestingcanachievegoodtestaccuracyforthisdynamicinteractionproblem.Thetestsofthesoil-structureinteraction(SSI)effectsfordifferentsoilsshowthatthesoftsoilreducesthestructureresponseamplitudeandextendstherespo
8、nseperiod.Withsoilbecominghard,SSIeffectsdecreaseandthestructureresponseswillultimatelyconvergetothesolutionsofrigidfoundation.Keywords:dynamicsoil-structure-fluidinteraction;real-timedynamichybridtest;aqueduct;lumped-parametermo
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