Research And Implement Of Path Planning For Large-Scale Composite Wind Turbine Blade

As the renewable, green and environmental protection energy, wind energy resource is one of the most developing hi-technologies in energy field. The blades of wind turbine rotor are regarded as the most critical component of the wind turbine system. With the development to large power, light weight and high performance ratio, large scale wind turbine blades is basically made of reinforced material and thermosetting base-resin, and produced through lay-up process at present.Based on the practical situation of wind field in Inner Mongolia region, 1.2WM variable-pitch blade of wind turbine system was chosen as the research object in the paper, composite fiber placement path planning and generating technology of large scale blades were researched. The results of the research shown that these approaches had certain theoretical significance and engineering value.The following works have been done in the paper:1. According to the technical performance index of 1.2MW blades, blade parameters such as rotor diameter, optimum design angle of attack, airfoil, thickness, string length and torsion angle were calculated and selected. Three-dimensional aerodynamic model of blades was built. Longgitudinal section and cross-sectional structure were analyzed of composite wind turbine blade.2. According to the propeller blade element theory, momentum theory and strip theory, the load of blades was analyzed, and centrifugal force, gravity, aerodynamic forces, the torque and stiffness of the blades were calculated. These researches laid the foundation to the simulation analysis of the blades.3. Three-dimensional finite element model of the blades was built in ANSYS. Stress analysis, strain analysis and modal analysis of blades were done, and results of the first principal stress, the shear stress, total deformation and the vibrationmodality were available. After testing, the results met the design standard.4. Two species placement algorithm(equidistant line and mean line) of large-scale composite wind turbine blade have been research. Through building mandrel model of blade, and getting mandrel centroid and placement reference line, path planning for classical angle of 0°、±45°、90°are generated in UG NX4 based on the above placement algorithms.