基于模糊理论的土体渗流固结参数识别

计算物理 ›› 2002, Vol. 19 ›› Issue (1): 81-85.

基于模糊理论的土体渗流固结参数识别

李守巨¹, 刘迎曦¹, 王登刚², 刘玉静³, 何翔¹

1. 大连理工大学工业装备结构分析国家重点实验室, 辽宁大连 116024;
2. 同济大学建筑工程系, 上海 200092;
3. 吉林工学院基础科学系, 吉林长春 130012

收稿日期:2000-03-09 修回日期:2000-09-05 出版日期:2002-01-25 发布日期:2002-01-25
作者简介:李守巨(1960-),男,辽宁辽中,副教授,从事岩土力学及其反问题研究,辽宁省大连理工大学工程力学系116023.
基金资助:
国家自然科学基金资助项目(10072014);工业装备结构分析国家重点实验室开放基金(GZ9908)

IDENTIFICATION OF CONSOLIDATION PARAMETERS OF SOILS BASED ON FUZZY THEORY

LI Shou-ju¹, LIU Ying-xi¹, WANG Deng-gang², LIU Yu-jing³, HE Xiang¹

1. State Key Laboratory of Structural Analysis of Industrial Equipment, Dalian University of Technology, Dalian 116023, China;
2 Building Engineering Department, Tongji University, Shanghai 200092, China;
3. Basic Science Department, Jilin Institute of Technology, Changchun 130012, China

Received:2000-03-09 Revised:2000-09-05 Online:2002-01-25 Published:2002-01-25

摘要/Abstract

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.

关键词: 模糊数学, 隶属度, 参数识别, 先验信息, 固结

Abstract: 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.

Key words: fuzzy mathematics, subordinate function, parameter identification, priori information, soil consolidation

中图分类号:

TU433

李守巨, 刘迎曦, 王登刚, 刘玉静, 何翔. 基于模糊理论的土体渗流固结参数识别[J]. 计算物理, 2002, 19(1): 81-85.

LI Shou-ju, LIU Ying-xi, WANG Deng-gang, LIU Yu-jing, HE Xiang. IDENTIFICATION OF CONSOLIDATION PARAMETERS OF SOILS BASED ON FUZZY THEORY[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2002, 19(1): 81-85.

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