基于叶脉分枝结构的飞机盖板结构仿生设计

Structural bionic design for aircraft cover plate based on leaf vein branched structure

针对薄壁件的轻量化设计要求,在对王莲叶脉分枝结构形态和构型规律分析基础上,以飞机盖板原型为对象,应用结构仿生设计方法,对盖板内部的筋板分布形式进行结构仿生设计,利用ANSYS APDL参数化设计语言建立仿生型结构的参数化模型并进行筋板结构参数优化.有限元分析结果表明,相对于原型盖板,结构参数优化后的仿生型盖板质量减小,比强度结构效能有较大提高,静力学性能明显改善.

Light-weight is a crucial requirement for structural design of thin walled parts. In the case of original aircraft cover plate, the leaf vein distribution principle of a giant waterlily was analyzed and applied to structural bionic design for original structure. Using ANSYS APDL as a finite element analysis tool, the para metric model of bionic structure was obtained and the best structural parameter of ribs in the bionic structure was presented through optimization. The finite element analysis （FEA） results indicate that, compared with o riginal structure, the optimized bionic structure has less weight, higher efficiency of specific strength, better static mechanical performances.