Wind Load Characteristics And Wind-induced Response Analysis Of Polar Integrated Photovoltaic Power Generation Device

The Antarctic continent is vast and contains rich biological resources and freshwater resources.The information of global climate change hidden under the ice sheet is of great significance to the study of the earth’s climate change.With the development of Antarctic exploration,many tasks need to be carried out in the field far away from scientific research stations,and power supply is one of the main problems restricting the implementation of long-term scientific research and observation in the field of Antarctica.Aiming at the power supply problem of Antarctic field observation,this paper designs an integrated photovoltaic power supply device,and analyzes the wind load characteristics of the integrated photovoltaic panel and the wind-induced response of the integrated structure.The main contents are as follows:Firstly,considering the Antarctic natural environment,transportation and construction conditions of scientific research station,an integrated photovoltaic structure scheme based on container is proposed.Based on the small container,ten photovoltaic panels can be integrated through the foldable photovoltaic support.After thermal insulation design,the container can provide a carrying platform for the electric control system,energy storage unit and observation equipment.Secondly,based on computational fluid dynamics,the wind load characteristics of integrated photovoltaic panels are analyzed.The influence law of integrated photovoltaic panel inclination condition and wind direction angle on its wind load characteristics is analyzed.The results show that the front row of photovoltaic panels bear a large wind load,and the rear row of photovoltaic panels are located in the wake area of the front row of photovoltaic panels,and the overall wind load is small.When the angle between the two rows of photovoltaic panels is too large,the rear row of photovoltaic panels bear negative pressure;The wind direction angle has a great influence on the wind load distribution of photovoltaic panels.When the wind comes from the side,it will increase the local wind load of photovoltaic panels.Thirdly,the mechanical characteristics of photovoltaic support under different wind load conditions are studied by finite element analysis method.The finite element model of photovoltaic support is established,and the stress and deformation of the support are analyzed.The results show that the lower beam of the front photovoltaic support is the main deformation area,and the wind from the side direction will cause the main deformation area of the support to shift to one side.The wind from the side will lead to the stress concentration of the support,and 135 ° is the most unfavorable wind angle.Finally,the dynamic response of photovoltaic support under fluctuating wind is studied.The time history of fluctuating wind speed based on Davenport spectrum is simulated by harmonic superposition method.Through the shape coefficient model of photovoltaic panel established in wind load analysis,the fluctuating wind load of each partition of photovoltaic panel is obtained.Then the dynamic response of the structure under fluctuating wind load is analyzed.It is found that the fluctuating wind has a dynamic amplification effect on the structural response.The maximum stress of the structure increases by 43% and the maximum deformation increases by 35%.