摘要
基于模糊数学理论 ,根据埋置在土体内部的超孔隙水压力观测数据 ,建立了土体固结参数模糊识别数值方法 .根据观测点的超孔隙水压力观测数据的统计特性 ,得到观测数据的隶属度函数 .基于待识别土体渗流固结参数的先验信息即约束条件 ,建立了模糊约束的隶属度函数 ,进而得到模糊化的目标函数 .以信息论方法为基础 ,研究了观测信息的随机不确定性和荷载的随机不确定性对参数识别结果的影响 .研究表明 ,基于信息论的模糊参数识别方法所得到的参数识别结果同样具有随机不确定性 .
Based on the fuzzy theory, the fuzzy identification algorithm of the soil consolidation parameters is set up according to the measured pore water pressure posited in the inner soils. The subordinate functions are also built in accordance with the statistic charactersistics of the observed pore water pressure. The fuzzy objective functions and the subordinate functions with fuzzy restriction are established too. Based on the information theory, the influence of uncertainty of the observed information and the uncertainty load to the identified results is studied. The research makes known that the identified results are still uncertain by making use of the above proposed identification algorithm. [
出处
《计算物理》
CSCD
北大核心
2002年第1期81-85,共5页
Chinese Journal of Computational Physics
基金
国家自然科学基金资助项目 ( 10 0 72 0 14 )
工业装备结构分析国家重点实验室开放基金 (GZ990 8)
关键词
模糊数学
隶属度
参数识别
先验信息
固结
土体
渗流
fuzzy mathematics
subordinate function
parameter identification
priori information
soil consolidation
