试验数据回归结果的评价方法.pdfVIP

第 22 卷 第 7 期 岩石力学与工程学报 22(7) ：1191～1195 2003 年 7 月 Chinese Journal of Rock Mechanics and Engineering July ，2003 试验数据回归结果的评价方法* 尤明庆 李化敏 纪多辙 (焦作工学院机械系 焦作 454159) (安阳师范学院 安阳 455100) 摘要 确定一些参数之间的关系通常采取回归的方法，而岩石力学的试验数据总是具有离散性，因此，对回归结 果的可靠性需要作出评价。以 Coulomb 强度准则的回归为例，采取减少或增加部分试验数据和改变岩样使用顺序 进行“假想试验”这两种方法，研究了回归结果的误差，从而可以给出内摩擦角在某一可信度下的取值范围，并 具体分析了试验围压范围对回归结果的影响。 关键词 岩石力学，试验数据，离散性，回归分析，可靠性，强度准则 分类号 TD 313 文献标识码 A 文章编号 1000-6915(2003)07-1191-05 EVALUATION METHODS TO REGRESSION RESULT OF EXPERIMENTAL DATA 1 1 2 You Mingqing ，Li Huamin ，Ji Duozhe 1 ( Mechanical Department ，Jiaozuo Institute of Technology ， Jiaozuo 454159 China) (2 Anyang Teachers College ， Anyang 455100 China) Abstract Regression is usually used to determine the relation among some testing parameters. Experimental data of rock mechanics are often dispersive，and the reliability of the regression result must be evaluated. In this paper， two methods to review the error of regression are given on the Coulomb criterion. One is to regress again after decreasing or repeatedly using some data. The other is to do ‘hypothetical experiments ’after arranging the specimens in various confining pressures. A certain range of the rock parameter like internal friction angle with certain reliability can be given. The effect of confining pressure range on the regression results of strength criterion is also discussed. Key words rock mechanics ，experimental data，dispersion，regression ，reliabi