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自相似仿生层次多胞薄壁管的耐撞性研究及优化

徐少强 李伟伟 李琳

徐少强,李伟伟,李琳. 自相似仿生层次多胞薄壁管的耐撞性研究及优化[J]. 机械科学与技术,2022,41(12):1852-1859 doi: 10.13433/j.cnki.1003-8728.20200517
引用本文: 徐少强,李伟伟,李琳. 自相似仿生层次多胞薄壁管的耐撞性研究及优化[J]. 机械科学与技术,2022,41(12):1852-1859 doi: 10.13433/j.cnki.1003-8728.20200517
XU Shaoqiang, LI Weiwei, LI Lin. Research and Optimization on Crashworthiness of Self-similar Bionic Multi-cell Thin-walled Tube[J]. Mechanical Science and Technology for Aerospace Engineering, 2022, 41(12): 1852-1859. doi: 10.13433/j.cnki.1003-8728.20200517
Citation: XU Shaoqiang, LI Weiwei, LI Lin. Research and Optimization on Crashworthiness of Self-similar Bionic Multi-cell Thin-walled Tube[J]. Mechanical Science and Technology for Aerospace Engineering, 2022, 41(12): 1852-1859. doi: 10.13433/j.cnki.1003-8728.20200517

自相似仿生层次多胞薄壁管的耐撞性研究及优化

doi: 10.13433/j.cnki.1003-8728.20200517
基金项目: 国家自然科学基金青年基金项目(11902183)
详细信息
    作者简介:

    徐少强(1996−),硕士研究生,研究方向为车辆系统动力学,xsq1220@163.com

    通讯作者:

    李伟伟,副教授,硕士生导师,liww@sdut.edu.cn

  • 中图分类号: O313.4

Research and Optimization on Crashworthiness of Self-similar Bionic Multi-cell Thin-walled Tube

  • 摘要: 仿生结构以其优异的力学性能被广泛的应用于各种机械结构中。为了提高薄壁结构的耐撞性,将结构仿生学概念引入其结构设计中,提出了一种新型的多胞薄壁吸能结构。采用了理论和数值模拟技术对0~2阶次层次截面的薄壁结构进行对比分析,结果表明:随着仿生层次结构的不断增加,仿生薄壁结构的吸能特性与变形模式进一步提升。同时,结合响应面法和遗传算法对2阶层次截面的薄壁结构进行了优化,并得到了相应的Pareto前沿图,为薄壁结构的耐撞性设计提供了新思路。
  • 图  1  仿生结构的演变

    图  2  计算模型

    图  3  简化的超折叠单元

    图  4  仿生结构截面图

    图  5  各薄壁管能量比率曲线

    图  6  3种薄壁结构的变形状态图

    图  7  各管的轴向冲击力-位移曲线

    图  8  误差分析图

    图  9  Isight流程图

    图  10  Pareto 最优解集

    表  1  有限元模型参数

    模型参数数值
    材料密度 $\rho /({\text{kg} }\cdot { {\text{mm} }^{ - 1} })$ 2.7×10−6
    泊松比 $\mu $ 0.3
    弹性模量 E/MPa 68210
    屈服应力/MPa 80
    极限应力/MPa 173
    网格尺寸/mm 2
    下载: 导出CSV

    表  2  各管的沙漏能

    截面形状沙漏能/J内能/J沙漏能与内能之比/%
    T02.193235.60.07
    T113.1213370.00.10
    T215.7922399.00.07
    下载: 导出CSV

    表  3  各管冲击力理论预测值与数值模拟值比较

    截面形状理论值/N仿真值/N相对误差/%
    T01.895×1042.021×104−6.23
    T19.419×1049.027×1044.35
    T21.451×1051.503×105−3.47
    下载: 导出CSV

    表  4  薄壁管的能量吸收

    截面形状内能/J质量/kg比吸能/(kJ·kg−1
    T03235.60.34569.362
    T113370.60.64820.63
    T222399.00.820827.29
    下载: 导出CSV

    表  5  样本数据统计

    编号D1/mmD2/mmt/mm${F_{PCF}}$/NSEA
    /(kJ·kg−1
    122.0019.371.684133620.025.74
    222.6818.110.86350400.017.42
    323.379.891.747129340.029.11
    424.0518.741.17980945.020.44
    524.7412.421.621123280.027.72
    625.428.631.24278086.021.68
    726.1114.951.30593666.023.09
    826.7916.840.80058959.015.34
    927.4715.581.432110330.023.91
    1028.1614.321.937171240.030.46
    1128.8417.471.874170050.028.59
    1229.5313.050.98963369.018.67
    1330.218.001.36895711.021.43
    1430.8913.681.116133620.019.72
    1531.5811.791.55850400.025.26
    1632.2610.532.000129340.027.84
    1732.9511.161.05380945.018.26
    1833.6316.210.926123280.016.76
    1934.3220.001.49578086.022.27
    2035.009.261.81193666.024.57
    下载: 导出CSV

    表  6  响应面优化值与有限元仿真结果对比分析

    参数取值 /mm目标参数NSGA-Ⅱ算法优化
    优化值仿真值误差/%
    D122.541SEA/(kJ·kg−129.07528.930.50
    D211.207FPCF/N123360124040−0.55
    t1.6901
    下载: 导出CSV
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出版历程
  • 收稿日期:  2020-07-31
  • 网络出版日期:  2023-02-16
  • 刊出日期:  2022-12-05

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