| The tensile membrane structure has the characteristics of light weight,high strength,high wave transmission,and low heat absorption.The structure is expected to be used in a new generation of large-scale marine radomes.In this paper,the dynamic response of the tensioned membrane radome under the action of wind load is studied.The main research contents and results are as follows:Through numerical simulation,the fluid-structure interaction dynamic response of the rectangular planar membrane structure under the action of wind load is studied,and calculated the maximum in-plane stress and maximum out-plane displacement of the membrane of the rectangular planar tensile membrane structure under different wind speeds,different wind direction angles and different initial membrane surface prestresses.The simulation results show that when the membrane structure resists the wind load perpendicular to the membrane surface,the deformation of the center of the structure is large.Under the same working conditions,with the increase of the initial prestress applied to the structure,the maximum deformation of the membrane surface also decreases,and the time for the membrane surface to reach the maximum deformation is shorter.Under the same prestress condition,the greater the inlet wind speed of the flow field,the greater the maximum deformation of the membrane surface of the membrane structure.Through numerical simulation,the fluid-structure interaction dynamic response of the saddle-shaped membrane structure under the action of wind load is studied,the form-finding shape of the saddle-shaped membrane structure under different initial prestresses of the membrane surface is studied,and the saddle-shaped membrane structure under different initial prestresses is calculated.Compared the simulation results of the maximum in-plane stress and maximum out-plane displacement of the membrane of the saddle-shaped membrane structure with the planar membrane structure.The results show that the flat membrane structure has better wind resistance than the saddle-shaped membrane structure when the initial prestress of the membrane surface is small.However,with the increase of prestress,the saddle-shaped membrane structure is better than the flat membrane structure in terms of the maximum inplane stress and maximum out-plane displacement.A scaled experiment of the plane tensioned membrane structure subjected to wind load is designed,and a simple wind tunnel is built.Through the experiment,the variation of the maximum deformation of the membrane surface under different wind speeds and different initial prestresses of the membrane surface is obtained.And compared with the numerical simulation results for the scaled model,the comparison results show that the experimental results and the numerical simulation show the same trend of change,which indirectly verifies the credibility of the simulation results in this paper. |
