航空学报 > 2024, Vol. 45 Issue (10): 229273-229273   doi: 10.7527/S1000-6893.2023.29273

快速优化薄板中各向异性材料分布的等效变形模量算法

许敉, 毛泽钡, 王博, 李桐()   

  1. 大连理工大学 工程力学系 工业装备结构分析优化与CAE软件全国重点实验室,大连 116024
  • 收稿日期:2023-07-06 修回日期:2023-07-24 接受日期:2023-08-08 出版日期:2024-05-25 发布日期:2023-08-24
  • 通讯作者: 李桐 E-mail:tong@dlut.edu.cn
  • 基金资助:
    国家自然科学基金(12172077);大连市高层次人才创新支持计划(2019RD04);大连市科技创新基金(2020JJ25CY011)

An equivalent⁃deformation⁃modulus algorithm for fast optimization of anisotropic material distribution in thin plates

Mi XU, Zebei MAO, Bo WANG, Tong LI()   

  1. State Key Laboratory of Structural Analysis,Optimization and CAE Software for Industrial Equipment,Department of Engineering Mechanics,Dalian University of Technology,Dalian 116024,China
  • Received:2023-07-06 Revised:2023-07-24 Accepted:2023-08-08 Online:2024-05-25 Published:2023-08-24
  • Contact: Tong LI E-mail:tong@dlut.edu.cn
  • Supported by:
    National Natural Science Foundation of China(12172077);Dalian High-Level Talent Innovation Support Program(2019RD04);Dalian Science and Technology Innovation Fund(2020JJ25CY011)

摘要:

各向异性材料广泛存在于各种机械设备的承重构件中。与各向同性材料不同,各向异性材料中不同材料相的分布和方向,可以根据载荷条件调整承重构件的力学性能。本文提出了一种各向异性材料分布的优化方法,即等效变形模量(EDM)算法,以有效地优化各向异性薄板的承载能力。该算法实现了对薄板抗弯能力的多模态协同优化,解决了传统优化算法中特征值重叠的问题,在航空领域中将起到重要作用。以短纤维增强聚合物薄板的纤维取向优化为例,在不改变薄板质量和形状的前提下,与传统优化算法相比,EDM算法可以将临界屈曲载荷提高28.9%,将计算成本降低98.1%。此外,EDM算法还被应用于机身中形状不规则的承重构件设计中,并使其临界屈曲载荷提高27.2%~30.8%。

关键词: 特征值, 等效变形模量, 多模态协同优化, 材料分布, 屈曲分析

Abstract:

Anisotropic materials widely exist in load-bearing components for various mechanical devices. Unlike isotropic materials, the distribution and orientation of different material phases in anisotropic materials can sensitively mediate the mechanical output of these components according to the loading conditions. In this paper, an optimization method for anisotropic material distribution, named Equivalent-Deformation-Modulus (EDM) algorithm, is proposed to efficiently optimize the load-bearing ability of anisotropic thin plates. This EDM algorithm will play an important role in the aviation, for it enables the multi-modal co-optimization for the buckling resistance of thin plates, and solves the problem of overlapping eigenvalue in traditional optimization algorithm. Taking the optimization of fiber orientation in short fiber reinforced polymer thin plate as an example, without changing the mass and shape of the plate, this EDM algorithm can improve the critical buckling load by 28.9% and reduce the computational cost by 98.1%, compared to traditional optimization algorithm. The EDM method was also applied to designing a load-bearing component in the airframe with an irregular shape by increasing the critical buckling load by 27.2%-30.8%.

Key words: eigenvalue, equivalent-deformation-modulus, multi-modal co-optimization, material distribution, buckling analysis

中图分类号: