马源, 曾攀, 赵加清, 陆红亚. 基于变形及固有频率测量的纤维增强复合材料 风机叶片等效弹性参数反求方法[J]. 工程力学, 2014, 31(7): 192-198. DOI: 10.6052/j.issn.1000-4750.2013.02.0122
引用本文: 马源, 曾攀, 赵加清, 陆红亚. 基于变形及固有频率测量的纤维增强复合材料 风机叶片等效弹性参数反求方法[J]. 工程力学, 2014, 31(7): 192-198. DOI: 10.6052/j.issn.1000-4750.2013.02.0122
MA Yuan, ZENG Pan, ZHAO Jia-qing, LU Hong-ya. INVERSE CALCULATION OF EQUIVALENT ELASTIC CONSTANTS OF FIBER REINFORCED COMPOSITE WIND GENERATOR BLADES FROM DISPLACEMENT AND NATURAL FREQUENCY MEASUREMENTS[J]. Engineering Mechanics, 2014, 31(7): 192-198. DOI: 10.6052/j.issn.1000-4750.2013.02.0122
Citation: MA Yuan, ZENG Pan, ZHAO Jia-qing, LU Hong-ya. INVERSE CALCULATION OF EQUIVALENT ELASTIC CONSTANTS OF FIBER REINFORCED COMPOSITE WIND GENERATOR BLADES FROM DISPLACEMENT AND NATURAL FREQUENCY MEASUREMENTS[J]. Engineering Mechanics, 2014, 31(7): 192-198. DOI: 10.6052/j.issn.1000-4750.2013.02.0122

基于变形及固有频率测量的纤维增强复合材料 风机叶片等效弹性参数反求方法

INVERSE CALCULATION OF EQUIVALENT ELASTIC CONSTANTS OF FIBER REINFORCED COMPOSITE WIND GENERATOR BLADES FROM DISPLACEMENT AND NATURAL FREQUENCY MEASUREMENTS

  • 摘要: 该文建立了一种基于变形及固有频率测量的风机叶片等效弹性参数反求方法。该反求方法通过构造偏差方程将弹性参数反求工作转化为函数优化问题。运用了数字图像相关算法测试叶片在静载及冲击载荷下的位移信息,并采用基于可变容限技术的遗传算法优化偏差函数,求解等效弹性参数。计算的等效弹性参数得到了叶片结构静载试验数据的验证,该弹性参数用于计算叶轮组的模态信息,该模态信息与单叶片的模态相对应。

     

    Abstract: An inverse calculation method is proposed in this study to determine the equivalent elastic constants of a wind generator blade. In this method, a deviation function is constructed using elastic displacements and natural frequencies of the blade. The function is thereafter optimized to determine the equivalent elastic constants. The static displacements and shock responses of the wind turbine blade are determined by the digital image correlation method and the deviation function is optimized by the genetic algorithm with the flexible allowance technique. Inversely calculated equivalent orthotropic elastic constants are verified by more static experiments on the blade. The elastic constants are also used to calculate the mode shapes of a three-blade rotor, which agrees with the mode shapes of a single blade.

     

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