Research on wind induced vibration response of flexible photovoltaic support structure considering friction effect
The flexible photovoltaic support structure may lead to significant displacement and vibration due to the wind load,so the wind-induced vibration response should be focused.The finite element model of three large span flexible photovoltaic support structure was mod-eled in SAP2000,and the wind load time history generated by the Davenport wind speed power spectrum was adopted as input load.The re-sponses of the flexible photovoltaic support structure was obtained and compared with the responses under static wind load.Then,the friction between the cable and the middle bracket was considered,and the wind-induced vibration responses under different friction coefficients and the influence of friction on the wind-induced vibration responses of flexible photovoltaic brackets were investigated.The results indica-ted that the displacement and cable force amplification coefficient are 1.64 and 1.63,respectively,in dynamic time history analysis.The friction between the cable and the middle bracket can increase the energy dissipation capacity of the structure,which help to reduce the wind-induced vibration responses of the flexible photovoltaic bracket.The equivalent wind load amplification coefficient values varied greatly under different working conditions,so it is necessary to comprehensively consider the actual situation and choose a reasonable value for the wind load amplification coefficient when conducting static analysis of flexible photovoltaic support structure.
Wind pressure time historyFlexible photovoltaic support structureFrictionWind induced vibration responseTime history analysis
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