考虑扰流装置的大跨柔性光伏阵列最大风推荷载及降载机理研究

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振动与冲击 ›› 2025, Vol. 44 ›› Issue (15) : 50-59.

振动理论与交叉研究

考虑扰流装置的大跨柔性光伏阵列最大风推荷载及降载机理研究

赵宏博1,2，柯世堂*1,2，李灏1,2，张春伟1,2，王文才1,2，秦岩1,2

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Maximum wind thrust load and load reduction mechanism of long-span flexible photovoltaic arrays considering spoiler devices

ZHAO Hongbo1,2, KE Shitang*1,2, LI Hao1,2, ZHANG Chunwei1,2, WANG Wencai1,2, QIN Yan1,2

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摘要

大跨柔性光伏阵列在0°来流风向角下遭受的推力最大，此时极易发生结构强度破坏，现行规范仅规定了柔性光伏支架风荷载的取值准则，缺乏针对风荷载降载措施的系统研究。为进一步提高大跨柔性光伏阵列的抗风性能，本文创新性地设计并制作了>型、<型、Γ型和L型四种来流扰流装置，开展了考虑/不考虑扰流装置的五种大跨柔性光伏阵列上下表面同步测压风洞试验，对比分析了不同扰流装置对光伏阵列平均、脉动和极值风荷载及扭矩力的影响，使用主成分分析法评价了四种扰流装置的降载性能，结合CFD(computational fluid dynamics)数值方法探究了扰流装置的降载机理。结果表明：四种扰流装置均显著降低了0°最大推力下光伏阵列的平均风压系数、极值正压系数和扭矩系数，但对光伏阵列的脉动风压系数和极值负压系数影响微弱；四种扰流装置降载性能由强到弱依次为>型、<型、Γ型和L型，相应降载性能评价指标为4.133、4.022、2.388和1.746；来流在扰流装置处分离产生的连续低压区域和涡脱再附产生的局部低压区域分别是首排和后排光伏板大幅降载的主导因素。

Abstract

Large-span flexible photovoltaic arrays are highly susceptible to structural failure under maximum thrust at a 0° wind direction. Current standards primarily focus on wind load calculations for flexible photovoltaic supports but lack comprehensive research on wind load reduction strategies. To enhance the wind resistance of these arrays, this study innovatively designs and tests four types of flow disturbance devices: >, <, Γ, and L types. Wind tunnel experiments with synchronized pressure measurements on both the upper and lower surfaces of the arrays were conducted, considering and not considering the disturbance devices. The study analyzed their effects on average, fluctuating, and extreme wind loads, as well as on torque. Principal component analysis (PCA) was employed to assess load reduction performance, and CFD simulations were used to explore the underlying mechanisms. The results indicate that all four disturbance devices significantly reduced the average wind pressure coefficient, extreme positive pressure coefficient, and torque coefficient at maximum thrust under a 0° wind direction, with minimal effects on fluctuating wind pressure and extreme negative pressure coefficients. The load reduction performance of the devices ranked as follows: >, <, Γ, and L types, with performance indices of 4.133, 4.022, 2.388, and 1.746, respectively. The continuous low-pressure region formed by the separation of incoming flow at the disturbance devices and the local low-pressure region resulting from vortex reattachment are the dominant factors leading to substantial load reduction on the first and rear rows of photovoltaic panels, respectively.

导出引用

赵宏博1, 2, 柯世堂1, 2, 李灏1, 2, 张春伟1, 2, 王文才1, 2, 秦岩1, 2. 考虑扰流装置的大跨柔性光伏阵列最大风推荷载及降载机理研究[J]. 振动与冲击, 2025, 44(15): 50-59

ZHAO Hongbo1, 2, KE Shitang1, 2, LI Hao1, 2, ZHANG Chunwei1, 2, WANG Wencai1, 2, QIN Yan1, 2. Maximum wind thrust load and load reduction mechanism of long-span flexible photovoltaic arrays considering spoiler devices[J]. Journal of Vibration and Shock, 2025, 44(15): 50-59

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