论文部分内容阅读
双三角翼气动布局比三角翼飞机具有更好的大攻角空气动力特性。引入了评估教练机训练效能的作战分析法 ,研究了双三角机翼布局飞机空气动力特性的工程计算途径以及飞机性能指标的确定方法。以训练效能作为目标函数并选取机翼平面形状的几何参数为设计变量 ,采用多变量数值寻优方法 ,在战术技术指标及相关几何约束条件下 ,对某高级教练机的双三角机翼气动布局方案进行了优化选择。算例表明最优方案不仅比原准方案具有更高的训练效能 ,还改善了结构的受力情况 ,与工程实践吻合。
The aerodynamic layout of the double delta wing has better aerodynamic characteristics at higher angles of attack than the delta wing aircraft. The operational analysis method for assessing the training effectiveness of trainer aircraft was introduced. The engineering calculation approach of the aerodynamic characteristics of the aircraft with the double delta wing layout and the determination method of the aircraft performance index were studied. Taking the training effectiveness as the objective function and selecting the geometric parameters of the wing plane shape as the design variables, the multivariable numerical optimization method is used to evaluate the aerodynamic layout of a double trapezoid wing of an advanced trainer under the tactical technical indicators and related geometric constraints. Program has been optimized choice. The example shows that the optimal scheme not only has higher training efficiency than the original scheme, but also improves the stress of the structure, which is consistent with engineering practice.