本文提出了一个基于遗传算法的平面叶栅优化设计方法。该方法利用奇点分布法设计无厚翼型骨线 ,然后通过遗传算法使叶栅表面边界层中的流动损失最小化 ,以此搜索沿骨线最佳的厚度分布规律 ,厚度分布被参数化表示。已知叶栅的流场分析由一个基于边界元的程序完成。将该方法应用于ZZ440叶栅的设计 ,结果显示是有效和可行的。 In this paper, an optimization method of plane cascade based on genetic algorithm is proposed. The method uses the singular point distribution method to design the thicker airfoil line, and then minimizes the flow loss in the boundary layer of the cascade by using genetic algorithm to search for the optimal thickness distribution along the bone line. The thickness distribution is parameterized Said. It is known that flow field analysis of cascades is done by a bounded element-based program. The method is applied to the design of ZZ440 cascade, the results show that it is effective and feasible.