复合材料风力机叶片尾缘结构优化设计

Structural optimization of trailing edge for composite wind turbine blade

针对静强度载荷作用下风力机叶片尾缘易发生局部屈曲失效问题,采用自适应单目标优化算法,将叶片气动中心与翼型曲线耦合约束,以叶尖挠度为优化目标,对叶片尾缘结构进行优化设计。分析尾缘屈曲变形规律,并与某企业提供的叶片静强度试验数据进行了对比,结果表明:优化后叶片模型在屈服强度、叶尖挠度和应变等方面的误差较传统纯壳体模型分别降低了10%、15. 7%和10. 6%,研究结果为叶片结构稳定性研究奠定了理论基础。

For the static strength load,the wind turbine blade trailing edge is prone to local buckling failure. The adaptive singleobjective optimization algorithm was used to couple the aerodynamic center of the blade with the airfoil curve. The tip deflection was optimization target and the trailing edge structure of the blade was optimized. The law of buckling deformation of the trailing edge was analyzed and compared with the static strength test data provided by a certain enterprise. The results show that the error of yield strength,tip deflection and strain of the optimized blade model is reduced by 10 %、15. 7 % and 10. 6 % respectively compared with the traditional pure shell model,the research results laid a theoretical foundation for the study of blade structure stability.