考虑结构动力学与颤振约束的颤振缩比模型优化设计  

Design Optimization of Scaled Flutter Model Considering Structural Dynamics and Flutter Constraints

作　　者：吴强[1] 万志强[1] 杨超[1] 

机构地区：[1]北京航空航天大学航空科学与工程学院,北京100191

出　　处：《航空学报》2011年第7期1210-1216,共7页Acta Aeronautica et Astronautica Sinica

基　　金：国家自然科学基金(901716006;10902006);高等学校博士学科点专项科研基金(20091102110015)~~

摘　　要：由于颤振缩比模型与原模型在承力结构上存在差异,当二者的结构动力学特性相似时,气动弹性可能并不等效。针对该问题,提出了同时考虑结构动力学约束和颤振约束的颤振缩比模型优化设计方法,建立了利用遗传/敏度混合优化算法求解此问题的流程,研究了优化问题中目标函数和约束条件的选取方式,并以机翼颤振缩比模型为算例对方法的有效性进行了验证。研究表明,对于颤振缩比模型的设计,所提出的同时考虑结构动力学约束和颤振约束的优化设计方法,较之单独考虑结构动力学约束的优化方法具有更好的适用性。For the load-carrying structures of original model and scaled flutter are different, their aeroelastic characteristics may not be matched when their structural dynamics are matched. For this problem, a method is presented of designing a scaled flutter model which takes into consideration both structural dynamics and flutter constraints; a process of using the ge- netic/sensitivity-based hybrid algorithm to solve this problem is built and the method of choosing objective functions and con- straint conditions is discussed. With an example of a scaled flutter model design, the validity of this method is verified. This example indicates that the design optimization method considering both structural dynamics and flutter constraints possesses better applicability than the design optimization method considering structural dynamics only.

关 键 词：气动弹性 缩比模型 颤振 结构动力学 优化设计 

分 类 号：V211.47[航空宇航科学与技术—航空宇航推进理论与工程]