基于二级优化技术的襟翼导轨设计方法研究及应用

Research and Application of Flap Guide Rail Design Based on Two-step Optimization Method

结构质量对飞机的各项性能具有至关重要的影响,为了有效降低飞机结构质量,合理布置材料,提高材料的利用效率,发展一种二级优化设计技术。以外襟翼平面导轨结构为研究对象,将优化设计问题分解成两个易于求解的子问题——顶层优化设计和底层优化设计,顶层优化设计采用拓扑方法确定腹板的加筋形式,底层优化设计采用尺寸优化确定襟翼导轨的厚度分布;通过两层优化,在结构质量最小化的基础上,使得结构形式最优化。结果表明:在保证应力和位移水平的前提下,二级优化设计技术可以快速有效地减轻结构质量,具有一定的工程应用价值。

The structure weight is of an important influence on the performances of the aircraft. In order to reduce the weight of the wing, distribute materials reasonably and improve utilization rate of materials, two-step optimization method is proposed for flap structure optimization design. Taking the structure of flap guide rail as research object, the complex optimization design problem is analyzed by top-layer and low-layer optimization de- sign as two basic events. The top-layer is topology optimization that determines the web stiffener forms and low-layer is size optimization that determines the thickness distribution of the flap guide rail. Through this two- step optimization, the best structure form base on minimize structure weight is determined. Results show that the method presented is feasible and correct, and is of a significant value in accelerating the engineer realization of the structure optimization.