基于蚁群算法和模态局部化参数的失谐叶盘减振研究

针对航空发动机叶盘结构由于失谐而引发振动超标事后处理的实际困难,建立了典型叶盘结构集中参数模型,分析了失谐叶片排列顺序对模态局部化的影响,将具有良好优化性能的蚁群优化技术应用到叶片安装位置的优化设计中.仿真结果表明:对于一组既定的失谐叶片,不同的叶片安装顺序能极大影响叶盘系统的固有特性;同时也证明了蚁群算法能够快速、准确地得到使叶盘模态局部化明显改善的叶片排列顺序,为叶盘系统的排障提供了一种有效手段

Vibration Reduction of Mistuned Blade-Disc by Ant Colony Algorithm and Modal Localization Parameter

A typical model of lumped parameters of blade-disc structure was developed to solve the problems of the difficult post-processing for the superstandard vibration of aero-engine caused by mistuned blade-disc structure. The effect of the sequential arrangements of mistuned blades on modal localization was studied, and the ant colony optimization technique was applied to the optimal design of positioning every blade. Simulation results showed that for the definite mistuned blades the different sequential arrangements will affect the inherent characteristics of the blade disc system very greatly and, simultaneously, verified that the ant colony algorithm can provide the sequential arrangements of blades quickly and accurately so as to improve obviously the modal localization of the blade disc, thus providing an efficient way available to the trouble-shooting of the blade disc system.