(1 石家庄铁道大学大型结构健康诊断与控制研究所， 石家庄 050043；2 河北省大型结构健康诊断与控制实验室， 石家庄 050043；3 石家庄铁道大学土木工程学院， 石家庄 050043； 4 河北省电力勘测设计研究院， 石家庄 050031)

［摘要］太阳能光伏板在使用的过程中由于地面起伏、植被生长、雪沙迁移等造成底部流体阻塞，影响气流流动及其表面风荷载。采用刚性模型测压风洞试验研究了底部阻塞率对太阳能光伏板表面风荷载的影响。通过对比分析不同阻塞率下太阳能光伏板表面风压分布、整体体型系数和风致弯矩系数，总结了阻塞率对光伏板风荷载的影响规律，分析了阻塞对风荷载的影响机理。结果表明：底部阻塞会明显增大光伏板上的最强风吸力，会减弱光伏板上的最强风压力及风致弯矩。研究成果可以为目前尚不完备的光伏板风荷载取值提供依据。

［关键词］太阳能光伏板； 风洞试验； 体型系数； 风荷载； 底部阻塞

中图分类号：TU311-3[HTSS],[HTH] TK519文献标识码：A文章编号：1002-848X(2019)02-0129-06

Study on effect of bottom flow obstruction on wind load of solar photovoltaic panels

Ma Wenyong1,2, Chai Xiaobing3, Liu Qingkuan1,2, Xing Keyong4, Liu Xiaobing1,2

(1 Structural Health Monitoring and Control Institute, Shijiazhuang Tiedao University, Shijiazhuang 050043, China; 2 Hebei Province Key Laboratory for Health Monitoring and Control, Shijiazhuang 050043, China; 3 Civil Engineering College, Shijiazhuang Tiedao University, Shijiazhuang 050043, China; 4 Hebei Electric Power Design & Research Institute, Shijiazhuang 050031, China)

Abstract:The space on bottom of solar photovoltaic panel is possibly to be blocked due to wavy terrain, plants, moving snow or sands and others during its service period, which affects the flow of wind and its surface wind load. The rigid model pressure wind tunnel test was used to study the effect of bottom flow obstructuion ratio on the wind load on the surface of solar photovoltaic panels. By comparing and analyzing the wind pressure distribution, overall body shape coefficient and wind-induced bending moment coefficient of solar photovoltaic panels under various bottom  flow obstruction ratio, the influence law of bottom flow obstruction ratio on wind load of photovoltaic panels was summarized, and the influence mechanism of obstruct on wind loads was analyzed. The results show that the bottom flow obstruction will significantly increase the strongest wind suction on the photovoltaic panel, which will reduce the strongest wind pressure and wind induced bending moment on the photovoltaic panel. The research results can provide a basis for the current incomplete photovoltaic panel wind load values.

Keywords:solar photovoltaic panel; wind tunnel test; shape coefficients; wind load; bottom flow obstruction

*国家自然科学基金项目（51378323）,河北省自然科学基金（E2017210107）,河北省高等学校科学技术研究项目（ZD2018063,QN2017355）。

作者简介：马文勇，博士，教授，硕士生导师，Email: ma@stdu.edu.cn。