为研究刚性支撑压块固定式光伏组件的抗风揭性能与破坏模式,考虑组件固定压块间距和边框高度的影响,开展不同参数组合的光伏组件抗风揭试验,进行光伏组件在模拟风荷载作用下的全过程加载,通过试验测得光伏组件及其固定压块的荷载-位移以及荷载-应变曲线,分析光伏组件的损伤变形特征及其失效模式。采用有限元分析软件ABAQUS建立光伏组件数值分析模型,进一步研究影响光伏组件抗风揭性能的主要因素。研究结果表明：光伏组件的风揭失效模式为固定压块与组件边框的咬合失效破坏,进而导致光伏组件整片掀落;提出光伏组件的风揭破坏准则,即当压块与光伏组件之间的相对滑移量超过压块对光伏组件边框的原约束面截面长度的2/3时,认定其破坏;减小光伏组件的长度与宽度、增加光伏组件的边框高度与固定压块间距均能有效提升光伏组件的抗风揭性能,其中减小组件宽度的提升效果最显著。
Abstract
To investigate the wind uplift resistance and failure modes of rigidly supported clamp-fixed photovoltaic （PV） modules, considering the effect of module fixation spacing and frame height, this study conducted wind uplift resistance tests on PV modules with different parameter combinations. The entire loading process of the PV modules under simulated wind load was measured, including displacement and strain changes. The damage deformation characteristics and failure modes of the PV module were analyzed. A numerical analysis model of the PV module was established using the structural finite element analysis software ABAQUS to further study the factors affecting the wind uplift resistance of the PV modules. The results show that the wind uplift failure mode of the PV module is the failure of the engagement between the fixed block and the module frame, leading to the entire PV module being uplifted. The wind uplift failure criterion for the PV module is defined as failure occurring when the slippage between the clamps and the PV module exceeds 2/3 of the original constraint surface section length of the block on the module frame. Reducing the length and width of the PV module, and increasing the height and fixation spacing of the PV module, can effectively improve its wind uplift resistance, with reducing the module width having the most significant effect.
关键词
光伏组件 /
抗风揭性能 /
数值模拟 /
抗风揭试验 /
失效模式 /
组件压块
Key words
PV modules /
uplift wind resistance /
numerical simulation /
wind resistance uplift test /
failure mode /
module clamp
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