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基于声发射和蝙蝠算法的三点弯曲作用下CFRP加固钢管的损伤性能研究

周灵杰 佘艳华 何佳明 黄俊杰 谢玉强

周灵杰, 佘艳华, 何佳明, 等. 基于声发射和蝙蝠算法的三点弯曲作用下CFRP加固钢管的损伤性能研究[J]. 复合材料学报, 2024, 42(0): 1-16.
引用本文: 周灵杰, 佘艳华, 何佳明, 等. 基于声发射和蝙蝠算法的三点弯曲作用下CFRP加固钢管的损伤性能研究[J]. 复合材料学报, 2024, 42(0): 1-16.
ZHOU Lingjie, SHE Yanhua, HE Jiaming, et al. Research on damage performance of steel tube reinforced by CFRP under three-point bending loads based on acoustic emission and bat algorithm[J]. Acta Materiae Compositae Sinica.
Citation: ZHOU Lingjie, SHE Yanhua, HE Jiaming, et al. Research on damage performance of steel tube reinforced by CFRP under three-point bending loads based on acoustic emission and bat algorithm[J]. Acta Materiae Compositae Sinica.

基于声发射和蝙蝠算法的三点弯曲作用下CFRP加固钢管的损伤性能研究

基金项目: 国家自然科学基金 (51408057);住房与城乡建设部科学技术项目 (2021-K-086)
详细信息
    通讯作者:

    佘艳华,博士,副教授,硕士生导师,研究方向为工程材料和结构检测 E-mail: syh916@126.com

  • 中图分类号: TB333

Research on damage performance of steel tube reinforced by CFRP under three-point bending loads based on acoustic emission and bat algorithm

Funds: National Natural Science Foundation of China (51408057); Ministry of Housing and Urban Rural Development Science and Technology Project (2021-K-086)
  • 摘要: 研究了碳纤维增强树脂复合材料(Carbon fiber reinforced polymer, CFRP)加固Q345钢管在弯曲负荷下的损伤性能。通过三点弯曲试验,采用吸能特性分析方法评估不同加固方式下的抗弯强度和能量吸收性能。采用声发射(Acoustic emission, AE)技术,对比分析了不同CFRP铺层方式对钢管的加固效果,以及探究结构内部损伤和弯曲破坏的声学特征演化规律。最后提出了蝙蝠算法(Bat algorithm, BA)优化最小二乘支持向量机(Least squares support vector machine, LSSVM)的损伤分类预测模型。研究发现,增加CFRP缠绕层数可以显著提升钢管的抗弯强度和吸能能力,但增大缠绕角度会降低结构性能。通过对比分析不同加固方式下试件的声发射信号,证实了声发射技术在揭示碳纤维复合材料钢管弯曲过程中的损伤模式方面的有效性。能量概率密度的分析和最大似然评估显示,无论加固方式如何,复合管在不同能量级别上均遵循幂律分布,且能量分布指数随着CFRP缠绕层数增加而增大、随着缠绕角度增加而减小。所建立的BA-LSSVM损伤分类模型对试件损伤过程中的损伤程度分类准确性高达98%以上。

     

  • 图  1  CFRP-钢复合管的制备

    Figure  1.  Preparation of CFRP-steel composite tube

    图  2  加载装置图(单位:mm)

    Figure  2.  Loading device diagram (Unit: mm)

    图  3  AE传感器布置位置

    Figure  3.  Location of the AE sensor arrangement

    图  4  CFRP增强钢管的破坏形式

    Figure  4.  Failure forms of CFRP-reinforced tube components

    图  5  ST和C2T0荷载-位移曲线

    Figure  5.  ST and C2T0 load-displacement curves

    图  6  CFRP加固钢管的荷载-位移曲线

    Figure  6.  Load-displacement curves of CFRP-reinforced steel tubes

    图  7  CFRP加固钢管的吸能特性参数对比

    Figure  7.  Comparison of energy absorption characteristic parameters of CFRP-reinforced steel tubes

    图  8  CFRP加固钢管的声发射信号特征参数图

    Figure  8.  Acoustic emission signal characteristic parameter diagram of CFRP-reinforced steel tubes

    图  9  CFRP加固钢管的能量释放特征

    Figure  9.  Energy release characteristics of CFRP reinforced steel tubes

    图  10  CFRP加固钢管的声发射能量概率密度分布图

    Figure  10.  Probability density distribution of AE energy of CFRP-reinforced steel tubes

    图  11  CFRP加固钢管的声发射能量临界指数最大似然估计曲线

    Figure  11.  Maximum likelihood estimation curve of AE energy critical index of CFRP-reinforced steel tubes

    图  12  蝙蝠算法流程图

    Figure  12.  Bat algorithm flowchart

    图  13  BA-LSSVM流程图

    Figure  13.  BA-LSSVM flowchart

    图  14  CFRP加固钢管的预测损伤类型与实际损伤类型对比图

    Figure  14.  Comparison chart of predicted damage types and actual damage types of CFRP-reinforced steel tubes

    表  1  钢管及碳纤维性能参数

    Table  1.   Performance parameters of steel pipe and carbon fiber

    Steel tube Carbon fiber
    Tensile strength/
    MPa
    Yield strength /
    MPa
    Extension rate Gram weight/
    (g·m−2)
    Tensile strength/
    MPa
    Elastic modulus/
    GPa
    Elongation rate
    670 409 16 300 3870 2.45 1.74
    下载: 导出CSV

    表  2  试件名称及参数

    Table  2.   Name and parameters

    Test specimensCFRP winding layersCFRP winding angle/(°)Quality/g
    ST--1651
    C2T0201799
    C4T0401953
    C2T302301798
    C2T602601801
    C2T902901800
    Note: ST—Steel tube.
    下载: 导出CSV
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  • 收稿日期:  2024-03-13
  • 修回日期:  2024-04-16
  • 录用日期:  2024-05-01
  • 网络出版日期:  2024-06-05

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