基于Guyan缩聚的颤振优化设计方法  

Flutter Optimization Method Based on Guyan Polycondensation

作　　者：李哲 洪良友[1] 曹清远 马泽鹏 徐振亮[3] 崔高伟[1] LI Zhe;HONG Liangyou;CAO Qingyuan;MA Zepeng;XU Zhenliang;CUI Gaowei(Beijing Institute of Structure and Environment Engineering,Beijing 100076,China;Huawei Technologies Co.Ltd,Shenzhen 518028,China;China Academy of Launch Vehicle Technology,Beijing 100076,China)

机构地区：[1]北京强度环境研究所,北京100076 [2]华为技术有限公司,深圳518028 [3]中国运载火箭技术研究院,北京100076

出　　处：《强度与环境》2024年第3期46-51,共6页Structure & Environment Engineering

基　　金：国家自然科学基金(12002055)。

摘　　要：飞行器在设计过程中为了避免颤振发生,会对舵面及其局部连接结构进行反复的迭代设计,直至满足规定的裕度要求。为了提高飞行器颤振优化过程中结构模态分析的效率,本文利用结构动力学原问题的力学特征,选择一组合适的减缩基向量,基于Guyan缩聚与超单元的模态综合法将大型结构的动力学问题进行物理降阶,将设计结构中不变方案的部分进行缩聚,变成外部超单元,提高结构方案迭代的效率,最终通过结构优化,实现了防止颤振的目标。In order to avoid the flutter,the aircraft will carry out repeated iterative design of rudder surfaces and its local connection structure until satisfying the margin requirements.In order to improve the efficiency of structural mode analysis in flutter optimization of aircraft,an appropriate set of reduced basis vectors is estabilished based on the mechanical characteristics of the original problem of structural dynamics.And then,the structure dynamic model is reduced by Guyan polycondensation and superelement methods.The parts of the invariable design scheme are condensed into external superelement so that the iteration efficiency is improved.Finally,the goal of preventing flutter is realized through structural optimization.

关 键 词：物理降阶 缩聚 颤振 

分 类 号：V215.3[航空宇航科学与技术—航空宇航推进理论与工程]