基于拓扑优化技术的导弹折叠舵结构颤振优化设计

在高超声速飞行的过程中,导弹舵面会出现颤振问题,可在短短几秒内导致结构破坏甚至解体.为了改善舵面颤振特性,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折叠舵结构颤振抑制设计,获得比原始设计方案拥有更大颤振临界速度的折叠舵结构.结果表明该方法具有如下优点: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创造性地应用到改善导弹折叠舵颤振特性的实际工程问题上,并在设计后进行强度校核;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,进而用拓扑优化方法高效解决.

DESIGN OF FLUTTER OPTIMIZATION FOR MISSILE'S PUCKER RUDDER STRUCTURE BASED ON TOPOLOGY OPTIMIZATION TECHNOLOGY

On the high-speed flight condition, the pucker rudder of missiles may have flutter problems that lead to damage even collapse of the structure in a few seconds. To improve the flutter characteristic of the pucker rudder and make the process more scientific and efficient, based on topology optimization technology, the program was developed to obtain a pucker rudder structure with higher critical flutter speed. The results show that the method has the following advantages: the traditional method like matching mass is left behind, on topology optimization technology, a new structure is achieved efficiently and accurately. The topology optimization is creatively applied to improve the flutter characteristic of the missile’s pucker rudder and the structural strength is checked after design. The flutter problem, a fluid-solid coupling problem, is simplified and the dynamics problem is innovatively transformed into statics problem so that it will be solved efficiently.