约束直接搜索法求解螺旋桨参数优化设计问题

建立了螺旋桨参数优化设计的计算模型，包括初步设计和终结设计两部分，都可归结为三变量（螺旋桨盘面比、螺距比、进速系数）的非线性约束优化问题，提出了组合复合形法和自适应随机搜索法的混合方法，经过算例比较，可更有效地解决复杂的非线性优化问题。

Constrained Direct Search Method to Solve the Propeller Parametric Optimal Design Problem

A propeller parametric optimal design model is established. It includes primary design and complete design, both of which can be generalized in the three variables (expanded area ratio,pitch ratio,advance coefficient) nonlinear constrained optimzation problem. A composite method combining complex method and adaptive random search method is presented. It is proved by some numerical examples that this method can solve sophisticated nonlinear optimal design problems efficiently.