Study On Wind Load And Wind-induced Response Of The Single-axis Solar Arrays

With the increasing size of solar modules and the requirement to reduce power generation costs,wind load has become the main parameter of solar bracket design.Compared with the traditional fixed support system,the single-axis tracking support system significantly increases power generation,so it is widely used.There is mutual interference between different rows of solar arrays.The design method that only considers single rows will increase the cost of the design of solar arrays.Under the action of wind load,the solar array is prone to large vibration and even damage.Therefore,the influence of wind direction,tilt angle,and other parameters on the wind load and wind-induced response of the single-axis solar arrays can provide an accurate basis for designing the single-axis solar arrays.In this study,the single-axis solar tracker is taken as the research object,the rigid model pressure test of the single-row solar module and solar array were carried out through the wind tunnel test,and the wind-induced response program of the single-axis solar arrays was written based on the Python to study the influence of the interference effect of the single-axis solar arrays on the wind load and structural response.It provides a reference for the wind-resist design of the single-axis solar arrays.The main contributions and results of this study can be summarized as follows.(1)Study on wind load interference effect of single-axis solar arrays.Aiming at the interference effect of wind loads on single-axis solar arrays,this study conducts rigid-model pressure measurement wind tunnel tests on the single-row solar tracker and solar tracker arrays.The essential characteristics of the wind-induced interference effects of the single-axis solar arrays are clarified.(2)Value suggestion of wind load for the single-axis solar arrays.The influence of tilt angle and wind direction on the wind load of the single-axis solar arrays is analyzed,which provides the basis for the value of wind load in different regions of solar arrays.(3)Study on the wind-induced response of the single-axis solar arrays.In this thesis,based on Python,the calculation program of natural vibration characteristics and the wind-induced response of the single-axis solar tracker is written.The effects of wind direction,tilt angle,and damping on the wind-induced response of the single-axis solar arrays are analyzed through the calculation and analysis of many models,combined with the wind load time history data obtained from wind tunnel tests.(4)Value suggestion of wind fluttering factor of the single-axis solar arrays.The wind fluttering factor under different working conditions is summarized.The value of the wind fluttering factor considering different regions,natural vibration frequency,and damping of the single-axis solar arrays is given.