In recent years, with the ever-increasing size of blades in wind power, the structural strength and destruction of composite blades have become increasingly important.
In order to reduce the potential threat to the safety and reliability of the blade structure due to the failure of blade local buckling, blade root transition failure, and bearing beam delamination, researchers at the Institute of Engineering Thermophysics, Chinese Academy of Sciences are not losing blade aerodynamic performance. Under the premise of this, innovative design concepts such as large-thickness blunt-edge edge roots, large-thickness leaves, stepped thickness bearing caps, etc. were proposed; and nonlinear finite element numerical analysis methods and full-scale blade bending capacity failure tests were used. The structural response characteristics of the new blade under the ultimate bending load are systematically analyzed, and the effectiveness of the structural design method in improving the ultimate strength of the composite blade and suppressing the local nonlinear buckling is fully verified. The method is applied to large-scale and super-large wind power. The possibility of composite blades. The research results have been successfully applied to a 100kW wind turbine generator. As of now, the subsequent field surveys are being steadily carried out.
The research results have been officially published in Proceedings of the ASME 2014 International Mechanical Engineering Congress & Exposition and Journal of SCIENCE CHINA Technological Sciences. Research work has been selected into the Cover Story and research papers have become Hot Papers.
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