载荷作用下太阳能聚光器两种光-机集成建模方法的验证  

Validation on Two Optical-Mechanical Integration Modeling Methods for Solar Concentrator Under Load

作　　者：颜健[1] 彭佑多[1] 刘永祥 胡耀松 Yan Jian;Peng Youduo;Liu Yongxiang;Hu Yaosong(School of Mechanical Engineering,Hunan University of Science and Technology,Xiangtan 411201,Hunan,China)

机构地区：[1]湖南科技大学机电工程学院,湖南湘潭411201

出　　处：《光学学报》2022年第20期135-145,共11页Acta Optica Sinica

基　　金：国家自然科学基金(52105097);湖南省自然科学基金(2020JJ5189)。

摘　　要：针对两种光-机集成建模方法开展验证研究,包括只考虑载荷作用下镜面单元空间位姿变化(忽略镜面自身弹性变形)的镜面位姿重构方法,以及本文提出的平面微元替代方法。平面微元替代方法是将聚光器反射镜面离散成大量平面微元,并根据平面微元的变形信息直接建立其几何光学信息,实现光-机分析的数据统一与集成,建立反射镜面的光-机信息集成模型。采用两种光-机集成方法模拟得到的聚焦能流分布结果相互印证,并与承载下聚光实验测量结果进行对比验证,结果充分说明了两种建模方法的有效性。当聚光器中各反射镜面的弹性变形较大时,镜面位姿重构方法将会失去准确预测其光学性能的能力;而平面微元替代方法能够考虑载荷作用下反射镜的任何变形(弹性变形和刚体位移),能准确预测聚光性能,具有普适性和简单的优点。对于聚焦能流密度较低的情况,实验表明采用粗糙白纸(打印纸)作为朗伯靶面用于聚焦能流密度测量简单可行。In this paper,we have carried out a validation study on two optical-mechanical integration modeling methods,including the mirror pose reconstruction method that only considers the spatial pose change of mirror surface units under load(ignoring the elastic deformation of the mirror surface)and the plane element substitution method proposed in this paper.The proposed method works by converting the reflecting mirror surface of the solar concentrator into many discrete plane elements and directly establishing the geometric optical information from deformation information of plane elements,so as to realize the data unification and integration of the optical-mechanical analysis,and the integration model of opticalmechanical information of the reflecting mirror is established.The results of focused flux distributions from the two opticalmechanical integration methods are verified jointly and compared with the measuring results from the experiment of solar concentrator under load,which fully demonstrates the effectiveness of the two methods.When the elastic deformation of all reflecting mirror surfaces in the concentrator is large,the mirror pose reconstruction method cannot accurately predict the optical performance of concentrators.However,the plane element substitution method can fully consider any deformation(elastic deformation and rigid body displacement)of the reflecting mirror under load and accurately predict the focused performance with its universality and simplicity.Experiments show that for low focused flux density,it is feasible to use rough white paper(printing paper)as the Lambertian surface to measure the focused flux density.

关 键 词：光学设计 太阳能聚光器 镜面变形 光-机集成建模 光学性能 能流分布 

分 类 号：TK513.1[动力工程及工程热物理—热能工程] TH122[机械工程—机械设计及理论]