光伏跟踪支架风荷载的确定及结构优化设计

Wind load determination and structuraloptimization design of photovoltaic tracking supports

光伏支架作为太阳能光伏系统的核心支撑结构,其性能优劣决定了系统能否安全高效运维。基于计算流体动力学(CFD)原理,利用FLUENT软件对光伏支架风场进行数值模拟,以确定光伏组件所承受的风荷载,并将计算结果与日本经验公式进行了比较验证。通过建立光伏支架的结构有限元模型,对光伏跟踪支架刚度、强度及模态进行了分析。根据分析结果,以质量最小化为目标函数、最大应力和变形为约束条件,在HyperStudy中运用全局响应面法对跟踪支架各部件的厚度进行优化设计。结果表明:在保证结构性能指标的基础上,光伏跟踪支架减重70 kg、轻量化减重率达19.4%。

As the core support structure of solar photovoltaic systems,the performance of photovoltaic brackets determines the safe and efficient operation and maintenance of the system.Based on the principle of computational fluid dynamics(CFD),the wind field of photovoltaic support was numerically simulated using FLUENT software to determine the wind load of photovoltaic modules.The calculation results were compared with Japanese empirical formulas for verification.The structural finite element model of photovoltaic support was established,and the stiffness,strength and modal analysis of photovoltaic tracking support were conducted.Based on the analysis results,with mass minimization as the objective function,and maximum stress and deformation as the constraints,the global response surface method was used to optimize the design of the thickness of each component of the photovoltaic tracking support in HyperStudy.Results indicate that on the basis of ensuring the structural performance indicators,the goal of reducing the weight of the photovoltaic tracking bracket by 70 kg and a lightweight weight reduction rate of 19.4%has been achieved.