New progress made in research on the whole structure system of wind turbines of engineering thermophysics

Destruction Response of Whole Wind Turbine Structure under Different Shutdown Attitudes

In order to ensure the safe and reliable operation of wind turbines under different working conditions, the entire structure needs to have sufficient structural strength. Under the action of some extremely probable extreme loads (such as super typhoon), structural destruction of wind turbines is inevitable. Since wind turbines are interconnected engineering equipment consisting of a variety of structural components (such as blades, towers, foundations) and mechanical components (such as generators, gear boxes, yaw and pitch systems, etc.), how In the case of extreme destruction events, it is of great significance to regulate and control the structure destruction process of wind turbines, effectively avoid the occurrence of catastrophic failure modes, reduce damage losses, and reduce subsequent maintenance costs.

To address this issue, researchers from the National Energy Wind Blade Research and Development (Laboratory) Center of the Institute of Engineering Thermophysics, Chinese Academy of Sciences have innovatively incorporated the concept of “strong column-weak beam” in structural engineering into the wind turbine assembly. The machine structure system, through comprehensive aeroelastic and structural analysis, reveals the fuse protective function of the vane blade damage to the whole machine; combining with the actual wind turbine destruction under extreme wind conditions, the different shutdown attitudes are clarified. The impact mechanism of the entire wind turbine destruction; research results pointed out that the current international design specification for wind turbine (IEC 61400-1) needs to be adjusted for the different levels of importance of different components, and the corresponding sub-coefficient coefficients are proposed. The related research results have been published in the Engineering Failure Analysis, an international academic journal. The research work has been supported by the National Natural Science Foundation of China and the starting fund of overseas students returning from the Ministry of Education.

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