基于增材制造的着陆器仿生缓冲结构的力学特性  

Mechanical properties of a bionic buffer structure of a lander based on additive manufacturing

作　　者：于征磊 曹青 张钧栋 沙鹏威 金敬福[2] 魏万祯 梁平 张志辉 YU Zheng-lei;CAO Qing;ZAHNG Jun-dong;SHA Peng-wei;JIN Jing-fu;WEI Wan-zhen;LIANG Ping;ZHANG Zhi-hui(Key Laboratory of Bionic Engineering,Ministry of Education,Jilin University,Changchun 130022,China;College of Biological and Agricultural Engineering,Jilin University,Changchun 130022,China)

机构地区：[1]吉林大学工程仿生教育部重点实验室,长春130022 [2]吉林大学生物与农业工程学院,长春130022

出　　处：《吉林大学学报（工学版）》2024年第10期3077-3084,共8页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家重点研发计划项目(2022YFB4600500);国家自然科学基金项目(51975246);吉林省科技发展计划项目(20230508045RC);吉林省发改委项目(2023C041-4);重庆市科技发展计划项目(CSTB2022NSCQMSX0225)。

摘　　要：为满足着陆缓冲器的吸能需求,从缓冲器的缓冲填充材料入手,借鉴Kelvin结构和螺旋结构,运用工程仿生原理,设计并建立了类足球烯仿生结构、多螺旋仿生结构两种结构模型。考虑到着陆器缓冲结构的吸能和可重复利用要求,通过增材制造技术并采用具有形状记忆效应的NiTi合金制备了仿生结构样件,通过模拟和试验对样件的力学特性、吸能和可回复性能进行分析验证。结果表明:通过对比仿真模拟实验和等距静压试验的力-位移曲线,验证了数值模拟的准确性;多螺旋仿生结构具有较好的力学性能,其最大吸能量为3096.23 J;两种结构的回复率分别高达98.02%和97.12%,类足球烯仿生结构回复率略高。该研究利用增材制造法制备了腿式着陆器缓冲仿生结构,为着陆器缓冲结构仿生设计提供了参考。In order to meet the energy absorption requirement of the landing buffer,this paper starts with the buffer filling material of the buffer,draws lessons from the Kelvin structure and spiral structure,and uses the engineering bionic principle to design and establish two kinds of structure models:footballene bionic structure and multi-helix bionic structure.Considering the requirement of energy absorption and reuse of the buffer structure of the lander,the biomimetic structure samples were prepared by NiTi alloy with shape memory effect and were made by additive manufacturing technology.The mechanical properties,energy absorption ability and recoverability of the samples were analyzed and verified by simulation and experiments.The results show that the accuracy of the numerical simulation is verified by comparing the force-displacement curves of the simulation test and the isometric static pressure test,in which the multi-helix bionic structure has better mechanical properties,and its maximum energy absorption is 3096.23 J;the recovery rates of the two structures are as high as 98.02% and 97.12%,respectively,and the recovery rate of footballene bionic structure is slightly higher.In this study,the bionic buffer structure of the leg lander is prepared by the method of adding materials,which provides a reference for the bionic design of the buffer structure of the lander.

关 键 词：工程仿生学 缓冲结构 数值模拟 增材制造 仿生设计 

分 类 号：TB17[生物学—生物工程]