摘要
为了确保基于遗传算法的土石坝土体参数反演结果的可靠性,应用数值逼近方法,分析了反演结果失真的原因,讨论了保证土体参数反演结果全局收敛的条件。在此基础上,提出了补偿观测信息的虚拟位移法,初步解决了观测值少、待反演参数较多时,反演结果失真的问题。最后用一个简单的算例验证了该方法是可行和有效的。
To ensure the reliability of the inverse-analysis of the material parameters of embankment dams, by using a genetic algorithm, a numerical approximation method is adopted to analyze the causes for the distortion of the inverse resuit. The conditions that must be satisfied to obtain globally convergent inverse result are discussed. According to these conditions, a new method, named as the virtual displacement method, is proposed to compensate the deficiency of the observed data. The results of an example show that the virtual displacement method is capable of obtaining global minima, proving its feasibility and effectiveness for solving inverse problems.
出处
《土木工程学报》
EI
CSCD
北大核心
2005年第8期118-122,共5页
China Civil Engineering Journal
基金
国家自然科学基金重点项目(50439010)
国家自然科学基金资助项目(50378012)
关键词
遗传算法
参数反演
虚拟位移法
genetic algorithm
inverse analysis
virtual displacement method
