In order to study the flutter performance of the flexible photovoltaic supports under the condition of roof wind field

based on the Ansys Fluent calculation platform

according to the measured results of a roof wind field

the simulation of the roof wind field is realized by embedding a custom function （ UDF ）. The Newmark-β method is used to calculate the fluid-solid coupling of flexible photovoltaic modules in the range of 0°-40°. The simulation includes vertical and torsional degrees of freedom. It is found that the flexible photovoltaic module will also undergo vertical bending and torsional coupling vibration in the roof wind field environment

and this flutter form is self-limiting soft flutter. The inclination angle of the photovoltaic module has a significant effect on the flutter performance of the roof flexible photovoltaic system： within the inclination angle of the photovoltaic module of 0°-30°

the flutter critical wind speed decreases with the increase of the inclination angle; in the angle of 30°-40°

the flutter critical wind speed increases with the increase of the inclination angle. The spectrum analysis shows that with the increase of inclination angle

the proportion of torsional motion in coupled vibration increases gradually

and the proportion of torsional component in the range of 0°-40°inclination angle is 52.3%-74.2%. The flutter critical wind speed obtained from this analysis can provide reference for the region selection and parameter design of roof flexible photovoltaic system engineering construction.