Study on Structural Performance of Double-layer Flexible Photovoltaic Support Structure
The double-layer flexible photovoltaic support structure displayed strong nonlinearity,large deflection and wind sensitivity,which requires in-depth studies on the structural performance.By means of the ABAQUS finite element(FE)software,the static behavior,the dynamic characteristics and response,and the wind vibration coefficient of the double-layer flexible photovoltaic support structure were investigated.The influences of the key parameters including the span length,the spacing of the horizontal connection system and the limit value of deflection on the structural performance were examined.It has been revealed that the wind-induced response of the structure increased with larger span length,and the mid-span deflection and the internal force of the upper-layer cables increased with increasing values of the spacing of the horizontal connection system.Moreover,the dynamic response of the structure can be reduced by raising the prestressing value of the upper-layer cables,while excessive prestressing of the lower-layer cable leads to amplified wind vibration response.The range of the wind vibration coefficient of the double-layer flexible photovoltaic support structure was provided,together with the prestressing suggestions for both the upper and lower-layer cables,which are capable of providing references for the anti-wind design of the structure.
flexible photovoltaic support structuredouble-layer cable systemstatic performancedynamic responsewind vibration coefficient
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