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中文摘要：
为了研究气动力非线性对飞机静气动弹性特性及飞行载荷的影响,发展了一种基于非线性气动力的飞机静气弹及飞行载荷计算方法。通过引入CFD计算结果,实现对线性方法中的气动力影响系数矩阵的非线性修正,采用模态法求解静气弹配平方程得到飞机非线性的气弹变形及飞行载荷。以某翼身组合体构型为计算算例,分别针对刚性模型和柔性模型,基于非线性气动力完成了飞机静气动弹性分析及载荷计算,并与线性结果进行了对比分析。结果表明,非线性方法可对大迎角范围内飞机静气弹变形及飞行载荷做出较合理的预测。
英文摘要：
In order to investigate the effect of the nonlinear aerodynamics on the characteristics of aeroelasticity and flight loads,the paper present the analysis method based on nonlinear aerodynamic data,in which aerodynamic influence matrix in linear method is modified through introducing the nonlinear results from CFD,and the static aeroelastic / trim equation is solved using modal method to obtain aircraft deformation and flight loads. As a numerical example,the aeroelastic characteristics and flight loads of rigid model and flexible model of a wing body configuration are studied respectively based on nonlinear aerodynamic data,and compared with those based on linear aerodynamic data. After the comparison,it can be concluded that： for high angle of attack,the nonlinear method can provide the rational aeroelastic results and flight loads.
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