某直升机全复合材料尾段结构优化设计研究

以蒙皮复合材料各方向铺层的厚度为设计变量,对直升机全复合材料尾段结构进行静力分析以及优化设计,使其在满足结构刚度、强度约束的条件下结构重量最轻.应用ANSYS软件,采用APDL参数化编程语言,实现参数化建模、静力分析以及优化设计.应用四种约束方法,提高优化结果的可靠性.优化结果表明,结构重量较初始经验设计减轻了50%左右,载荷分配更加合理,消除了一些应力集中现象,使其更好的满足全部的约束条件,达到预期的优化效果.

Optimization Design of Composite Cauda Structure of a Helicopter

By regarding ply depth of composite skins as designed variables,the static analysis and optimization design of composite cauda structure of a helicopter are performed for a best structure weight within given structural stiffness and strength.This paper develops an optimization design environment of ANSYS software system,which applied APDL-command facilities to achieve structural geometrical model,static analysis and structural design optimization.For better reliability of optimization results,four kinds of restrict methods are adopted.The optimization design results shown that structure weight has a notable reduction,even 50% compared with the early structure,and load distribution seems more reasonable under the fulfillment of restrict conditions.