摘要
基于Laplace积分变换法和遗传算法,提出了一种混凝土一维瞬态导热反问题求解的新方法。运用Laplace变换将温度的求解表示为只与空间坐标及浇筑时间有关的函数,使得反问题的求解具有测点布置灵活的特点。运用遗传算法寻求非线性反演问题全局最优解,只需要若干点温度实测值便可实现多个热学参数的同时反演,算例对反演方法的反演精度及数值稳定性给出了满意的证明。
Based on Laplace transform method and genetic algorithms, a new method for the solution of inverse problem of one dimensional transient heat conduction is proposed. By using Laplace transform method, temperature is expressed as the function of space coordinate and placing time only, which means that the measuring values needed for the solution of inverse problem can be chosen more freely. By using genetic algorithms to get the optimum solution of nonlinear inverse problem, multiple thermal parameters are obtained simultaneously with only a few test points. Numerical examples are provided to verify the present method.
出处
《工程力学》
EI
CSCD
北大核心
2003年第5期87-90,105,共5页
Engineering Mechanics
