基于拓扑优化技术的升力面结构颤振抑制设计

DESIGN OF FLUTTER SUPPRESSION FOR LIFTING SURFACE STRUCTURE BASED ON TOPOLOGY OPTIMIZATION TECHNOLOGY

导弹在高速飞行的过程中,会出现升力面颤振问题,可在短时间内导致导弹结构破坏甚至解体。为了改善升力面颤振特性,并让设计过程更加科学和高效,结合拓扑优化技术,开发了相应的优化程序应用于导弹升力面结构颤振抑制设计,获得比原始设计方案拥有更大颤振临界速度的升力面结构。所设计的方法具有如下优点:相比传统的配重等方法,从拓扑优化的新思路高效、准确地获得新构型;将拓扑优化的前沿技术应用到改善飞行器升力面颤振特性的实际工程问题上;将颤振这种复杂的流固耦合问题从结构动力学问题逐步简化为静力学模型,用拓扑优化方法解决。

On a high-speed flight condition, the lifting surface of missiles may have flutter problems that lead to structural damage even collapse. To improve the flutter characteristic of the lifting surface and make the process more scientific and efficient, the program was developed to obtain a lifting surface structure with higher critical flutter speed, based on topology optimization technology. The results show that the method has the following advantages: on topology optimization technology, a new structure is achieved efficiently and accurately, but the traditional method such as matching mass is left behind; the topology optimization is applied to improve the flutter characteristic of the aircraft lifting surface; the flutter problem, a fluid-solid coupling problem, is simplified, and the dynamic problem is innovatively transformed into a static problem so that it will be solved simply.