reliability ofnumerical monlv used finiteelement method forsimulating deformation ofgeological structure.The Duncan.Chang E,B model.a nonlinear elasticmodel widelv used inthegeological engineering,is chosen inthispaper.One core dam used as an example forthe sensibilitv analysis.The resultsshow thatthe main parameters influencing thedeformation of core wallsoil are K,Rfand妒,n shows weak sensibilityrelatively.The increase ofKand can result in an decrease intheverticaldisplacement and the increase of吩can result inthe increase oftheverticaldisplacement.On thewhole,the sensibility ofthe Duncan.Chang model parameters tothedisplacement greater than thesensibility totheeffective stress ofthesoil. Key words:Duncan—Chang E—Bmodel;sensitivity analysis;core wallsoil:finiteelement method 2 3 4 ¨ 心口 M 瞪
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