海绵吸收层法在坝-库水瞬态动力相互作用分析中的应用
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摘要
将海绵层与Sommerfeld人工边界结合起来模拟无穷水库的辐射阻尼效应,并结合有限元法在时域内分析坝—库水动力相互作用。计算了刚性坝面瞬态动水压力及柔性坝—库水动力相互作用的分析,结果说明这种方法在时域内模拟无穷水库动水压力波向上游的辐射阻尼效应是适合的。但需注意海绵层的体积阻力系数不能取得太大。
A method combining sponge layer with Sommerfeld boundary for modeling the radiation damping of infinite reservoir is proposed. It can be couple with standard FEM to analyze the transient dynamic interaction between dam and reservoir. Numerical examples are presented to illustrate the effectiveness of the procedure.
A method combining sponge layer with Sommerfeld boundary for modeling the radiation damping of infinite reservoir is proposed. It can be couple with standard FEM to analyze the transient dynamic interaction between dam and reservoir. Numerical examples are presented to illustrate the effectiveness of the procedure.
引文
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[3] YangR,TsaiCS,LeeGC.Explicittime domaintransmittingboundaryfordam reservoirinteractionanalysis[J].InternationalJournalforNumericalMethodsinEngineering,1993,36(11):1789-1804.
[4] 王进廷.高混凝土坝-可压缩库水-淤砂-地基系统地震反应分析研究[D].北京:中国水利水电科学研究院,2001.
[5] PetropoulosPG,ZhaoL,CangellarisAC.AreflectionlessspongelayerabsorbingboundaryconditionforthesolutionofMaxwell'sequationswithhigh orderstaggeredfinitedifferenceschemes[J].J.Comput.Phys,1988,139:184-—05—208.
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[8] TsaiCS,LeeGC.AnalysisofDam reservoirSystem.Ⅱ:SubsructureMethod[J].J.Engng.Mech.,ASCE,1991,117(9):2007-2026.
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