Abstract: Abstract: The concentrated wind energy device is the core of the concentrated wind energy generator, and its material can directly affect the widespread application of the concentrated wind energy generator. This research adopts a fluid-solid interaction (FSI) method. At first, a solid-field model of a concentrated wind energy device is created with the help of the CAD software according to the size of the model. And a cylindrical area is established after the solid-field model is imported into the finite element analysis software. The cylindrical area has a radius of 10 m and a length of 30 m and the distance between the inlet of the fluid-field area and the inlet of the concentrated wind energy device is 5 m. Then in the cylindrical area, a geometric fluid field is established through Boolean subtraction of the solid field area. Based on the CFD software analysis of the fluid field, the wind flow is simulated in a specific wind field. A non-uniform tetrahedron meshing and an SST k-ω turbulence model are adopted. The fluid medium is air, with the temperature of 296.75 K, the density of 1.044 kg/m3, the pressure of 88 800 Pa, the viscosity of 1.85×10-5 kg/(m·s), the thermal conductivity coefficient of 0.02623 W/(m·K), and the constant-pressure specific heat capacity of 1 013 J/(kg·K). During the simulation, the wind speed is set to 25 m/s, the mass flow rate is set to 8199.557 kg/s, and the corresponding turbulent kinetic energy and the specific dissipation rate are respectively 0.714963 m2/s2 and 24.67 s-1. The mass flow inlet and pressure flow outlet are adopted. The roughness height of surface is set to 0.3 mm. When the component residual reaches 1.0×10-4 kg/s, the equation converges and the distribution of the wind speed and wind pressure in the fluid field is obtained. The result shows that the maximum wind speed that the central cylinder can work on the wind turbine blades is 35 m/s and the fluent speed increases along the radial direction of the wall, with a maximum speed of 38.8 m/s at the central cylinder. This indicates that the concentrated wind energy device has increased wind speed and concentrated its energy. In the structural static module, the whole solid field is divided into tetrahedral meshes and the size of each structural unit is 0.02 m. The stress cloud plot and the solid-field deformation plot are obtained after the calculated results of the fluid field are loaded on the concentrated wind energy device. The plots show that the maximum stress area is on the outer edge of the diffusion pipe with a maximum stress of 3.267 MPa, which is far less than the yield strength of 66 MPa, the fracture stress of 65 MPa and the bending strength of 98 MPa in the candidate German Bayer's makrolon-2407 polycarbonate. Therefore, it is concluded that this type of polycarbonate can be used to make the concentrated wind energy device. Meanwhile, the results of the analysis can provide theoretical basis and reference for the later structural improvement and design optimization.