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Author(s): |
Xin Wang, School of Mechanical & Electric Engineering, Tianjin Polytechnic University, Tianjin, China/Tianjin Key Laboratory of Advanced Mechatronics Equipment Technology, Tianjin Polytechnic University, Tianjin, China
Yuxiu Xu, School of Mechanical & Electric Engineering, Tianjin Polytechnic University, Tianjin, China/Tianjin Key Laboratory of Advanced Mechatronics Equipment Technology, Tianjin Polytechnic University, Tianjin, China
Yubao Du, College of Publish, Hangzhou Dianzi University, Hangzhou, China. |
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Abstract: |
In this paper, the dynamic characteristics of the large wind turbine blade are studied from the material shrinkage and expansion of ice when the temperature decreases. The dynamic characteristic of a 2.5MW blade is calculated with the thermal load. The blade static and dynamic characteristics caused by low temperature and expansion of ice are gotten from the deformation, stress distribution and dynamic response. This provides a theoretical basis for the anti-frozen design of the large wind turbine blade. The study shows that, with the continuous decreasing of temperature, the second bending dynamic stress of blade gradually reduces, and the third bending dynamic stress gradually increases. When the temperature drops to - 40℃, the maximum dynamic stress of blade has exceeded the allowable value. The risk of fracture will occur if we continue to work.
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