中文摘要：

针对大展弦比复杂机翼，提出了一种在机翼全局坐标系下综合考虑机翼扭转角、上倾角和后掠角的机翼刚度计算方法。以某大展弦比复杂机翼为例，用笔者提出的方法给出了复杂机翼刚度计算的具体过程与计算结果，并与国外文献的计算方法作了对比分析。结果表明：笔者所提出的方法概念更具合理性，刚度计算结果精度更高。文中所提出的方法可对大展弦比复杂机翼刚度计算分析提供有益参考。

英文摘要：

For complex wings with large aspect ratio, a calculation method for the structural stiffness is presented. In this method, torsion angle, dihedral angle and swept-back angle are taken into consideration in the global refer- ence frame in a comprehensive manner. Taking the complex wings with large aspect ratio as an example, the specif- ic calculation process and results of the stiffness are illustrated. In addition, a comparison between this method and other calculation methods is made. The results of the comparison indicate that the main theory of the calculation method in this paper is more reasonable and the stiffness of complex wings is more accurate. Therefore, our method is a better method for calculating the stiffness of complex wings with large aspect ratio.