基于双层复形法的重力坝断面优化研究  

Optimization of gravity dam section based on double-layer complex method

作　　者：李斌[1] 杨杰[1,2] 

机构地区：[1]西安理工大学水利水电学院,陕西西安710048 [2]西北旱区生态水利工程国家重点实验室培育基地,陕西西安710048

出　　处：《西北农林科技大学学报（自然科学版）》2016年第11期228-234,共7页Journal of Northwest A&F University(Natural Science Edition)

基　　金：陕西省重点科技创新团队项目(2013KCT-015);西北旱区生态水利工程国家重点实验室开放基金项目(106-221210)

摘　　要：【目的】进行重力坝断面优化设计的算法研究,为减小重力坝断面面积,优化重力坝体型提供参考。【方法】以复形法为基础,简化了在所有约束条件下寻找可行点的收缩步骤以减少计算次数,然后构造了双层优化结构,即把第1层复形的优化结果作为第2层复形的初始点,再以复形法原理进行优化,最后以某拟建重力坝为实例进行了坝体横断面的优化分析。【结果】优化后的各断面特征参数均满足要求,其断面面积较原设计方案减小了15.97%,坝体体型更瘦,且坝体上、下游应力分布更加合理。【结论】双层复形法较复形法具有更高的稳定性、更快的收敛速度,可适用于大体积、结构复杂的水工结构优化设计。【Objective】Optimization algorithm of gravity dam section design was researched to decrease the cross-section area and optimize the body of gravity dams.【Method】Based on the complex method,the contraction steps of searching feasible points under all constraints were simplified for the decrease of calculation times.Then,a double-layer optimization structure was constructed,i.e.the optimization results of the first layer were used as the initial points of the second layer.Complex method was used again for optimization and a gravity dam was optimized as an example.【Result】All section characteristic parameters met the requirements after optimization,the cross-section area was reduced by 15.97% and the body was thinner.The dam stress distribution of upstream and downstream face were more reasonable.【Conclusion】Compared with the complex method,double-complex method had higher stability and faster convergence rate,and it can be applied to optimization design of large-volume,complex hydraulic structures.

关 键 词：水工结构 混凝土重力坝 断面优化 双层复形法 

分 类 号：TV314[水利工程—水工结构工程]