摘要
为了提升类方形蜂窝等效力学性能,在推导了其尺寸参数与等效力学性能的函数后,将尺寸参数作为设计变量、等效力学性能为优化目标,建立了类方形蜂窝夹芯胞元优化数学模型,采用了多目标遗传算法进行优化设计。给出胞元尺寸单参数响应及多尺寸协同作用的响应分析并从多目标优化代表性解中选取到最优解。优化结果得到:当夹芯胞元尺寸参数l/t取114.3899、l/h取0.9598时,等效密度增加59.52%,y方向等效弹性模量减小了67.37%,但x方向等效弹性模量增大了109.77%,等效剪切模量增加了421.94%,类方形蜂窝夹芯的等效力学性能显著提升。研究结果对类方形蜂窝夹层结构的优化设计提供一定的依据和参考。
In order to improve the equivalent mechanical performances of quasi-square honeycombs,a mathematical model of cell optimization was established and a multi-objective genetic algorithm was used for the optimization design.With deduction of the function of dimension parameters and equivalent mechanical properties,the size parameters were taken as the design variables and the equivalent mechanical properties were taken as the optimization objectives,The optimized results show that when the l/t is 114.3899 and the l/t is 0.9598,the equivalent density rose by 59.52%,the y-direction equivalent elastic modulus decreased by 67.37%.In contrast,the equivalent elastic modulus in x-direction rose by 109.77%and the equivalent shear modulus rose by 421.94%.The equivalent mechanical performances of quasi-square honeycomb structure are significantly improved.The research results provide some basis and reference for the optimal design of honeycomb sandwich structures.
作者
李响
黄欢
段宇
殷圣地
LI Xiang;HUANG Huan;DUAN Yu;YIN Shengdi(Hubei Engineering Research Center for Graphite Additive Manufacturing Technology and Equipment,China Three Gorges University,Yichang 443002,China;College of Mechanical and Power Engineering,China Three Gorges University,Yichang 443002,China)
出处
《机械》
2023年第9期1-7,共7页
Machinery
基金
国家自然科学基金(51975325、51305232)
三峡大学石墨增材制造技术与装备湖北省工程研究中心开放基金(HRCGAM202108)。
关键词
类方形蜂窝
等效力学性能
优化设计
胞元尺寸
quasi-square honeycomb
equivalent mechanical performance
optimized design
cell size
