摘要
首次将Bayes参数估计理论引入大体积混凝土不稳定温度场热学参数随机反演问题,建立了可考虑时间累计效应的Bayes参数反演误差函数,并首次将优化理论中的变尺度法应用于该反演问题,推导了相应的计算公式,同时给出了热学参数反演的计算步骤,通过一典型分析得出了若干有益结论。
Stochastic back analysis of thermal parameters, including coefficient of thermal conduction, coefficient of heat conduction as well as coefficient of superficial radiation of transient temperature field of mass concrete, is presented using the Bayesian parameter estimation theory. An error function is established, by which, the cumulative time effect can be taken into account. DFP optimization method is implemented in the stochastic back analysis. Corresponding formulas as well as the computational methods and steps are also presented. The thermal problem of a typical mass concrete block is taken as an example to demonstrate the suggested method for the solution of random thermal parameter identification.
出处
《工程力学》
EI
CSCD
北大核心
2003年第5期114-120,共7页
Engineering Mechanics
基金
国家自然科学基金(59809003)
教育部博士点专项科研基金(1999029402)
关键词
工程力学
温度场
随机反演
随机有限元
热学参数
engineering mechanics
temperature field
stochastic back analysis
SFEM
thermal parameter
