基于人工神经网络的拱坝混合优化方法

Coupling Optimization Method for Arch Dam Based on Artificial Nervous Network

在用拱梁分载法和弹粘塑性块体元法对拱坝地基系统进行耦合分析的基础上 ,建立了一套同时考虑坝体强度和坝肩稳定条件的拱坝体型优化方法 ,并给出了拱坝优化的一般形式。采用了人工神经网络结构近似分析方法来综合各种约束条件 ,加快优化过程 ,并通过指数形式的罚函数将约束优化问题转化为无约束优化问题来求解。应用上述方法 。

Based on the coupling analysis for arch dam-foundation system by the method of load divided between arch ring and vertical cantilever and by the method of elasto-visco-plastic analysis of block element, a set of optimized procedure for determining the shape of arch dam is established in consideration of the strength of dam and the stability of abutment in the same time, and a general pattern for the optimization of arch dam is given also. In addition, an approximate analysis method of artificial nervous network is used to synthesize the constraint factors and to quicken the pace of optimization, and to transform the problem of constrained optimization to the problem of unconstrained optimization by using exponential penalty function. As a practical instance, this method is used for the optimization of Xiaowan arch dam.