摘要
由试验或经验公式求得的混凝土温度场计算参数,往往和施工现场实际参数有较大出入,给温度场仿真计算精度带来了不利影响。为此,研究了一种温度场计算参数的优化反演方法。根据实测温度资料,在考虑水管冷却效果的混凝土温度场有限元计算程序基础上,结合数学上的优化方法———复合形法,进行了混凝土温度场热学参数的反演。对三峡右岸地下电站引水洞衬砌混凝土热学参数反演的结果表明。
The calculation parameters obtained by experimentation or experiential formulas are usually different from actual values of construction site. The untrue parameters bring the negative influence to the precision simulation of the temperature field in concrete. We present one method of back analysis for the calculation parameters of temperature field in concrete. FEM was used to calculate temperature field in concrete with cooling water pipes. Based on the observations and calculated values of temperature, the parameters of temperature field in concrete were back-analyzed with complex method. We applied this method to the optimizing back-analysis for the temperature field in concrete of Three Gorges Project. The numerical example showed that the proposed method is feasible and effective, and the results are reasonable.
出处
《水力发电》
北大核心
2003年第12期44-46,54,共4页
Water Power
基金
国家自然科学基金项目(50139030)
973项目(2002CB412707)
河海大学科技创新基金(2003411443)
关键词
混凝土温度场
冷却水管
复合形法
参数反演
三峡工程
引水洞
衬砌
concrete temperature field,cooling water pipes, complex method,back analysis of parameters,Three Gorges Project
