舵面结构参数化建模方法及气动弹性应用

以典型舵面为对象研究适用于飞行器部件的结构参数化建模方法及应用。首先,提出一种基于有限元方法,及映射变换法则的,由二维网格参数化剖分向三维外形展开的,参数化描述思路,通过Matlab编程实现其流程算法;然后,将舵面参数化建模,与结构动力学及颤振分析相结合,分别将结构模型、气动网格和插值结点做参数化描述,进而实现舵面颤振分析模型的参数化;最终,将参数化建模方法,与遗传算法优化流程相结合,实现舵面外形及结构参数的优化设计。以某全动尾翼模型为例,应用文中方法极大提高了结构建模效率;与遗传算法相结合,在满足约束条件的前提下,实现了该舵面初始方案47%的结构减重效果。研究成果可为概念设计阶段的舵面设计提供指导。

Parametric Modeling Method and Aeroelastic Application of Rudder

A typical rudder is studied to conduct a research on the structural parametric modelingmethod and application, which applies to aircralt parts. Firstly , the parametric description based on fi.nite element method and mapping transformation,expansion from two-dimensional mesh parametricdivision to three-dimensional contour, is proposed, which can be realized by Matlab codes ; then , para.metric modeling of rudder can be combined with structural dynamics and flutter analysis. Structuralmodel, aero mesh and interpolation node can be deseribed in a parametric way ,to realize the parame.terization of rudder flutter analysis model : finally ,parametric modeling of rudder would be combined with genetic algorithm optimization ,to realize the optimal design of rudder profile and structural parameters. Taking a typical all-moving tail for instance, the effciency of modeling can be highlraised:Combine with genetic algorithm,the weight of the rudder reduces to 4796 of the initial one un.der constraint condition. The result can provide guidance for the rudder design in conceptual design.