邓肯张非线性材料模型参数优化计算方法  

Parametric optimization method for Duncan-Zhang nonlinear material model

作　　者：陈江[1] 赵云川[1] 李朝政[1] 韦建平 

机构地区：[1]中国水电顾问集团昆明勘测设计研究院科学研究分院,云南昆明650033 [2]陕西省渭南市公路管理处,陕西渭南714000

出　　处：《水利水电科技进展》2012年第1期27-29,44,共4页Advances in Science and Technology of Water Resources

摘　　要：以SL237—1999《土工试验规程》建议的计算方法为依据,以邓肯张EB模型K,n参数的计算为主线,提出了一种邓肯张非线性材料模型参数优化计算方法。该方法首先得到5种拟合方案的参数计算结果,以此为依据确定K,n参数的二维矩形区域,然后在该区域内随机搜索与试验结果符合较好的参数点构成有效点集,根据有效点集确定优选参数。该方法综合考虑了5种拟合方案的计算结果,得到的优选参数是试验数据的充分体现,与规程建议的方法相比更具代表性。Based on the method suggested by the Chinese specification of soil test（SL 237—1999）,a parametric optimization method for Duncan-Zhang nonlinear material model is proposed by regarding the computation of K and n of Ducan-Zhang E-B model as the main clue.Firstly,the calculated results of K and n of five fitting schemes are obtained.Thus,the 2D rectangle area of K and n is determined.Then the efficient point sets which have good accordance with the test results are randomly searched in this area.Finally,the optimized parameters are determined according to the efficient point sets.The proposed method comprehensively considers the calculated results of five fitting schemes,and the yielded optimized parameters adequately reflect the test data.To this end,this method is more representative than the one suggested by the Chinese specificition of soil test（SL 237—1999）.

关 键 词：土石料 邓肯张非线性材料模型 三轴压缩试验 参数优化 

分 类 号：TV41[水利工程—水工结构工程]