基于正交试验方法的双屈服面弹塑性模型参数敏感性分析

分析了面板坝堆石体双屈服面弹塑性模型的多个参数,采用正交试验方法结合有限元数值分析,进行了γ、φ0、Δφ、K、n、Rf、Cd、nd和Rd等9个参数的4水平正交试验设计,利用坝体某断面上两个节点的不同方向的位移值,经方差分析得到了模型各参数对坝体位移的敏感性。分析结果表明：K、n、nd、φ0、γ是模型中具有较强敏感性的参数,对坝体的位移起主要控制作用,而Δφ、Rf、Cd和Rd的敏感性较弱。

Analysis on Parameter Sensitivity of Double Yield Surface Elastoplastic Model Based on Orthogonal Test Method

Several parameters of double yield surface elastoplastic constitutive model(SHEN Zhu-jiang’s model) in concrete faced rockfill dam(CFRD) were analyzed firstly in this paper.Using orthogonal test method and numerical analysis with FEM and taking the different directional displacement of two nodes as test index,an orthogonal design test of sensitivity analysis was carried out considering four levels of nine parameters: γ,0,Δ,K,n,Rf,Cd,nd andRd,then the influences of these parameters on the dam deformation were obtained.It is concluded that K,n,nd,0 andγ are sensitive parameters which control the deformation of dam;other parameters,such as Δ,Rf,Cd andRd,have little influence on displacement of dam.