风轮机叶片电磁散射特性的占比分析与解析模型的建立

针对风轮机叶片雷达散射截面积的变化特性，分析了风轮机叶片雷达散射截面积（Radar Cross Section, RCS）对其整体雷达散射特性占比情况，实现对叶片解析模型适用范围的选取。考虑了风轮机叶片旋转平面与雷达视线（Line of Sight, LOS）夹角、叶片材料、叶片几何形状等因素对风轮机散射特性的影响，运用UG软件对风轮机叶片进行三维建模，利用真实叶片与相应简化圆柱叶片电磁散射特性的差异构建高保真的风轮机真实叶片电磁散射特性的解析模型，实现风轮机叶片RCS的快速计算。最后将解析模型计算结果与实测数据进行对比，验证了论文给出的真实叶片电磁散射特性解析模型的有效性。 

The Proportion Analysis of the Electromagnetic Scattering Characteristics and the Construction of Analytical Model for Wind Turbine Blades

Electromagnetic scattering characteristics of the wind turbine blades are analyzed.Based on the proportion analysis of the wind turbine blade RCS to its overall radar scattering characteristics,the applicable range for the analysis model of the wind turbine blades is selected.The UG software is used to model the wind turbine blade in three dimensions,in which the influence factors on the scattering characteristics are considered,such as the angle between the rotation plane of the wind turbine blade and the line of Sight(LOS),wind turbine blade material and geometry and so on.The analytic model of the electromagnetic scattering characteristics of the real blade is constructed by using the difference of electromagnetic scattering characteristics between the actual blade and the corresponding simplified cylindrical blade.The proposed model can realize the fast calculation of the RCS of wind turbine blades.Finally,the results obtained by the proposed analytical model are compared with the measured data,which can verify the validity of the proposed analytical model.