Qingge Cai , Shitang Ke , Lishan Wang , Hehe Ren , Chunwei Zhang , Hongxin Wu , Yunchu Zhou , Zebin Cai
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引用次数: 0
Abstract
Research on wind-induced vibration of large-span flexible photovoltaic(PV) array only give wind-induced response analysis and vibration reduction measures, but ignore morphological evolution laws among arrays. In this study, an aeroelastic model of 3-span 5-row suspension cable flexible PV array was designed with considerations to similarity ratio relationship of a strict wind tunnel test. Synchronous full-array aeroelastic wind tunnel tests of vibration under different wind direction angles and wind speed were carried out. The responsible characteristics of the structural system were analyzed systematically by using variation modal decomposition. Results demonstrated that strong vibrations were observed in the single row of PV when the wind speed was above a critical value. The support designed between PV array can restrain the strong wind-induced vibration. The wind-induced vibration degrees of each row of PV array are different, but the laws are basically consistent. The first row in the direction of the incoming flow vibrates at a low frequency. The wind-induced vibration of PV panel is mainly random buffeting, the farther away from the wind field, the more obvious the torsion. The vibration energy of vertical displacement of the PV array changes from low-order mode to high-order mode with the increase of row number. The energy dissipation phenomena of high-frequency intervals at the fifth downwind row are more obvious.
期刊介绍:
Solar Energy welcomes manuscripts presenting information not previously published in journals on any aspect of solar energy research, development, application, measurement or policy. The term "solar energy" in this context includes the indirect uses such as wind energy and biomass