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本文对复合材料翼面结构进行了满足颤振速度约束的最小重量设计。目标函数为结构重量,颤振速度及工艺尺寸要求为约束条件,运用可行方向法求解优化问题。文中用双三次多项式来模拟翼面复合材料蒙皮厚度,多项式系数及其他有限元的厚度或横截面积为设计变量,通过变量成组减小设计规模,用解析法求颤振速度对设计变量的导数。文后用本法对两个机翼盒段模型进行了优化设计。
In this paper, the minimum weight design that satisfies the flutter speed constraint of the composite airfoil structure is carried out. The objective function is the constraint of structure weight, flutter velocity and process size requirements, and the feasible direction method is used to solve the optimization problem. In this paper, the bi-cubic polynomial is used to simulate the thickness of the airfoil composite skin, the polynomial coefficients and the thickness or cross-sectional area of other finite elements as design variables, the design scale is reduced by grouping variables, and the flutter velocity Derivatives. After the text with the method of two wing box model was optimized.