基于第二代非支配排序遗传算法的转子优化设计  

Design and Optimization of a Two-Disk Rotor System Based on NSGA_Ⅱ

作　　者：黄晶晶[1] 郑龙席[1] 刘钢旗[1] 梅庆 

机构地区：[1]西北工业大学动力与能源学院,陕西西安710072 [2]航空发动机振动技术航空科技重点实验室,湖南株洲412002

出　　处：《推进技术》2015年第12期1881-1886,共6页Journal of Propulsion Technology

基　　金：航空科学基金(20112153019)

摘　　要：为了减小双盘转子系统的整体振动,针对航空发动机普遍采用的典型1-0-1支承结构下的双盘转子,提出了一种使用多学科优化软件Isight与通用有限元软件ANSYS集成的分析方法。将两转盘位置作为优化变量,以一阶临界转速在10%内的变化为约束条件,采用第二代非支配排序遗传算法NSGA_Ⅱ(Non-Dominated Sorting Genetic AlgorithmⅡ)最小化过一阶临界转速时两转盘的振幅。在高速柔性模拟转子试验器上进行了试验验证,优化后,盘1过一阶临界转速时最大振幅下降了77%,盘2下降了68%,试验结果证明了该优化方法的正确性,能够有效、准确地获取转盘的最优位置,提高了转子设计的效率和质量。In order to reduce the overall vibration of a two-disk rotor system,an integrated analytical method was proposed to optimize the two-disk rotor system under the aero-engine support structure of typical 1-0-1with multidisciplinary optimization software Isight and general finite element software ANSYS. The positions of the two disks were selected as the optimization variables,the first critical speed with the variation range of 10%was set as the constraint,and the optimization objective was to minimize the amplitudes of the two disks crossing the first critical speed with Non-Dominated Sorting Genetic Algorithm Ⅱ（NSGA_Ⅱ）. In order to verify the validity of the design optimization,the transient test was carried out on a high-speed flexible rotor mockup. The maximum amplitude of disk 1 cross first critical speed fell by 77% and the maximum amplitude of disk 2 decreased by 68% after optimization. Experimental results indicate that the optimization method could obtain the positions of the flexible rotor with the minimum amplitude effectively,accurately and rapidly,and improve the design efficiency and quality.

关 键 词：双盘转子 多目标优化 第二代非支配排序遗传算法 

分 类 号：V231[航空宇航科学与技术—航空宇航推进理论与工程] O347.6[理学—固体力学]