摘要
采用多层次的优化策略,提出一种碟式太阳能聚光器桁架结构的优化设计方法。首先,基于渐进结构优化方法(ESO)建立聚光器机架的拓扑优化模型,针对拓扑优化中的棋盘格问题给出一种过滤消除方法。其次,根据机架结构的拓扑优化结果,提出一种桁架拓扑结构的特征线提取方法,将拓扑优化结果转换为可供截面优化的线单元。最后,对聚光器中桁架结构的截面尺寸进行优化。以38 kW碟式-斯特林太阳能发电系统为例,面向工程制造桁架结构开展轻量化优化设计。结果表明,自重下单件新型桁架和原有桁架的最大变形相同时,重量减轻了34.4%,优化策略为面向工程制造的桁架结构设计提供了新思路。
The optimal design method of the truss structure in solar concentrator system is presented by hierarchy optimization strategy.First of all,the topology optimization model of the concentrator frame is established based on the method of evolutionary structure optimization(ESO).Next,according to the topology optimization of the frame structure,a feature line extraction method is presented to transform the topological optimization result into line unit.Then the truss section size is optimized based on the feature line extraction result.Finally,the optimization of the section size of the truss structure in the concentrator is completed.Taking the 38 kW dish-Stirling solar system as an example,a lightweight optimization design has been carried out for the truss structure in the concentrator system.The result shows that the weight of the single new truss is reduced by 34.4%when the new truss and the original truss has the same maximum deformation.This optimization strategy could provides fundamental for the lightweight design of truss structure.
作者
程自然
颜健
彭佑多
Cheng Ziran;Yan Jian;Peng Youduo(Hunan Provincial Key Laboratory of Health Maintenance for Mechanical Equipment of Hunan University of Science and Technology,Xiangtan 411201,China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2020年第4期99-106,共8页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(51641504)
湖南省自然科学基金(2016JJ2052)
湖南省研究生科研创新项目(CX2016B549)。
关键词
太阳能
碟式聚光器
拓扑优化
桁架结构
渐进结构优化方法(ESO)
solar energy
dish concentrator
topology optimization
truss structure
evolutionary structure optimization(ESO)
