1.长春光华学院 机械工程学院,长春 130033
2.吉林大学 生物与农业工程学院,长春 130022
于地,男,1989年生,吉林长春人,硕士,实验师;主要研究方向为机械电子工程;E-mail:292287091@qq.com。
收稿:2025-04-02,
纸质出版:2025-10-15
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于地,王兆阳,刘岩松,等. 仿生分形夹芯板芯体结构吸能特性研究[J]. 机械强度,2025,47(10):124-130.
YU Di,WANG Zhaoyang,LIU Yansong,et al. Study on energy absorption characteristics of biomimetic fractal sandwich plate core structure[J]. Journal of Mechanical Strength,2025,47(10):124-130.
于地,王兆阳,刘岩松,等. 仿生分形夹芯板芯体结构吸能特性研究[J]. 机械强度,2025,47(10):124-130. DOI: DOI:10.16579/j.issn.1001.9669.2025.10.014.
YU Di,WANG Zhaoyang,LIU Yansong,et al. Study on energy absorption characteristics of biomimetic fractal sandwich plate core structure[J]. Journal of Mechanical Strength,2025,47(10):124-130. DOI: DOI:10.16579/j.issn.1001.9669.2025.10.014.
为提高传统夹芯板的能量吸收效率,受王莲叶脉树状分形结构启发,设计了一种仿生树状分形夹芯板芯体(Biomimetic Tree-Like Fractal Core
BTLFC)。首先,通过准静态压缩试验,发现二阶BTLFC的比吸能较传统蜂窝芯体提升了5.69%,平均压溃力提升了4.46%。其次,建立了BTLFC的有限元数值模型,结合准静态压缩试验数据,表明有限元模型误差在2.2%以内,证明了有限元模型具有较高的准确性。最后,采用拉丁超立方试验设计、Kriging代理模型及第二代非支配排序遗传算法(Non-dominated Sorting Genetic Algorithm-Ⅱ
NSGA-Ⅱ)对BTLFC的结构参数组合(尺寸比
r
、分叉角度
θ
、分形阶数
D
)进行了多目标优化设计。优化后BTLFC的最优结构展现了更优异的综合性能,其比吸能较传统蜂窝芯体提升了10.19%,峰值压溃力降低了12.27%,质量减小了11.79%。研究结果可为开发高性能能量吸收结构提供新的仿生设计思路。
To enhance the energy absorption efficiency of conventional sandwich panels
a biomimetic tree-like fractal core (BTLFC) inspired by the dendritic fractal structure of the royal lotus leaf vein was designed. Firstly
quasi-static compression tests revealed th
at the 2-order BTLFC exhibited a specific energy absorption 5.69% higher and an average load 4.46% greater than traditional honeycomb cores. Secondly
a finite element numerical model of the BTLFC was established; combined with quasi-static compression test data
the finite element model error was within 2.2%
demonstrating high accuracy of the model. Finally
Latin hypercube test design
Kriging surrogate model
and the non-dominated sorting genetic algorithm-II (NSGA-II) were employed to perform multi-objective optimization on the structural parameter combinations of the BTLFC (size ratio
r
bifurcation angle
θ
fractal order
D
). The optimized BTLFC structure exhibited superior comprehensive performance
with specific energy absorption increased by 10.19%
peak crushing force reduced by 12.27%
and mass decreased by 11.79% compared to traditional honeycomb cores. The findings provide novel biomimetic design insights for developing high-performance energy absorption structures.
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