船闸底板混凝土热力学参数反分析

Inverse analysis of thermodynamic parameters of lock soleplate's concrete

对某船闸上游中底板混凝土热力学参数进行了反分析。运用三维有限元传热模型结合遗传算法,确定了该船闸底板的发热率公式。据此发热率公式对船闸底板三维瞬态温度场进行数值分析,并与原型观测试验进行了对比。结果显示,计算值与原型观测值在时间历程上最大相差1.1%,反分析可满足工程精度要求;同时验证了利用三维有限元方法结合原型观测数据反分析混凝土绝热温升规律等热力学参数的可行性;反分析过程显示,遗传算法的快速性一定程度上弥补了采用三维模型增加的计算量。

This paper analyzes the thermodynamic parameters of the upper lock soleplate＇s concrete.The three-dimensional finite element heat-transfer model,combined with genetic algorithm,is used to determine the heating rate formula of lock soleplate.Based on the formula,this paper numerically analyzes the three-dimensional transient temperature field of lock soleplate and compares the analyzed results with the prototype observed ones.The analyzed and compared results show that the maximum discrepancy in the time history between calculated values and prototype observed ones is 1.1% and that the results of inverse analysis could meet the project accuracy requirements.Also,it verifies that inverse analysis on the thermodynamic parameters of temperature rise law of concrete adiabatic combined with three-dimensional finite element and prototype observation is feasible.The process of inverse analysis displays that the rapidity of genetic algorithm makes up for the computation increased by three-dimensional model.