| With fossil resources drying up, new energy of wind power technology has been greatly admired and developed. Inner Mongolia has unique wind resources, but frequent sandstorm weather lead wind turbine blade coating to erode seriously which are under the high speed rotation, and it shortens the service life of the blade and also increases the operation and maintenance coasts of wind farms.This paper researches contact mechanical properties of wind turbine blade coating in the wind-carrying erosion and wear process which is aimed at the special geographical environment of Inner Mongolia. Based on Hertz theory, it analyzes and deduces the normal and tangential contact mechanics formula in the process of sand erode blade coating. And when erosion speed and sediment concentration under the same condition, it gets normal stress increases with the increase of erosion angle, tangential stress decreases with the increase of erosion angle. Tangential contact force value always being the maximum when erosion angle is 30. Using ANSYS finite element simulation software to simulate the change of contact force in the process of sand erode blade coating. The simulation results show that the maximum stress appear at the erosion center location, and the stress from the erosion center location gradually expand outward in the form of wave, while stress values also gradually become smaller. Adopting A401 thin film pressure sensor to verify software simulation models on the erosion wear test bench, and measures contact force values under the different parameters of sediment concentration, erosion speed and erosion angle.Through using the research method of theoretical calculation, ANSYS/LS-DYNA simulation and experimental verification, it analyzes the contact mechanical property of wind turbine blade coating in the erosion process. And it also further provides certain scientific basis for the improvement and optimization of the wind turbine blade coating. |
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