基于正交设计的颗粒流模型宏细观参数相关分析——以岩石单轴压缩数值试验为例

分析颗粒流模型中宏细观参数的关系，可为细观参数的匹配提供依据。以平行黏结模型作为基本模型，以单轴压缩数值试验作为宏观参数测试方法，对数值试验进行正交设计，采用多因素方差分析研究细观参数对宏观参数的影响。结果表明：弹性模量E主要受Ec(〖AKE-〗c)影响；泊松比γ主要受kn/ks(〖AKk-〗n/〖AKk-〗s)影响；单轴抗压强度σ_n主要受平行黏结强度参数σ_cn，τ_cs，SD/Mean影响；μ对宏观强度参数没有显著影响，而对宏观变形参数具有一定影响；R_A只对泊松比γ存在一定影响。在此基础上，建立了针对岩石单轴压缩数值试验的细观参数匹配方法。

Analysis on relationship between macro-parameters and micro-parameters in PFC2D model based on orthogonal design:case of rock uniaxial compression numerical test

The analysis of the relationship between macro-parameters and micro-parameters in PFC2D model is very useful to the calibration of micro-parameters in application. The parallel bond model is selected as the basic model and the uniaxial compression numerical test is used to obtain the macro-parameters. An orthogonal design is adopted to design the numerical tests and multi-factor analysis of variance is used to analyze the influence of micro-parameters on macro-parameters. The results show that the elasticity modulus is mainly affected by Ec ( ), the Poisson's ratio is mainly affected by kn/ks ( ); uniaxial compressive strength is mainly affected by,and SD/Mean; μ has little influence on macroscopic strength parameters, but influences the macroscopic deformation parameters; and RA only influences Poisson's ratio. On this basis, the matching solution of micro-parameters for rock uniaxial compression numerical test is established.