• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2025, Vol. 61 ›› Issue (24): 38-47.doi: 10.3901/JME.2025.24.038

• 仪器科学与技术 • 上一篇    

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基于BO-CNN模型的复合材料疲劳损伤超声导波监测方法

丁梦珂1, 高东岳1, 顾海洋1, 王博睿1, 周国泰2, 武湛君1   

  1. 1. 江南大学纤维工程与装备技术学院 无锡 214122;
    2. 哈尔滨玻璃钢研究院有限公司 哈尔滨 150000
  • 收稿日期:2025-02-08 修回日期:2025-09-02 发布日期:2026-01-26
  • 作者简介:丁梦珂,女,2001年出生。主要研究方向为结构健康监测。E-mail:6233017005@stu.jiangnan.edu.cn
    高东岳(通信作者),男,1984年出生,博士,副研究员,硕士研究生导师。主要研究方向为耐极端环境复合材料飞行器结构健康监测、中极端环境传感器可靠性分析、大型结构网络优化设计。E-mail:gaody@jiangnan.edu.cn
  • 基金资助:
    国家自然科学基金面上(12372134);江苏省研究生科研与实践创新计划(SJCX24_1356)资助项目。

Ultrasonic Guided Wave Monitoring of Composite Fatigue Damage Based on BO-CNN model

DING Mengke1, GAO Dongyue1, GU Haiyang1, WANG Borui1, ZHOU Guotai2, WU Zhanjun1   

  1. 1. College of Fiber Engineering and Equipment Technology, Jiangnan University, Wuxi 214122;
    2. Harbin FRP Institute Co. Ltd. Harbin 150000
  • Received:2025-02-08 Revised:2025-09-02 Published:2026-01-26

摘要: 监测复合材料疲劳损伤对保障复合材料结构安全具有重要意义。为此,提出基于超声导波与机器学习模型相结合的复合材料疲劳损伤监测方法,旨在提高损伤识别的准确性。该方法首先筛选出受疲劳损伤影响较大的超声导波信号特征,再进行共线性分析降低特征矩阵冗余性,进行预处理后组成样本库;然后以信号特征矩阵为输入,以损伤特征为输出构建出卷积神经网络(Convolutional neural network,CNN)损伤预测模型,结合贝叶斯优化(Bayesian optimization,BO)调整模型超参数,最后将样本库按照8∶1∶1的比例随机分成训练集、验证集和测试集,利用验证集进行超参数选择,测试集进行模型评估。试验结果表明:构建的BO-CNN损伤预测模型相对于CNN损伤预测模型具有更好的损伤诊断能力,量化精度从0.94提高至0.98,且损伤回归预测任务中表现出更高的可靠性。

关键词: 结构健康监测, 疲劳损伤, 机器学习, 卷积神经网络, 贝叶斯优化

Abstract: Monitoring composite fatigue damage is of great significance to ensure the safety of composite structures, for this reason, a composite fatigue damage monitoring method based on the combination of ultrasonic guided wave and machine learning model is proposed, aiming to improve the accuracy of damage identification. The method firstly screens out the ultrasonic guided wave signal features that are greatly affected by fatigue damage, then carries out covariance analysis to reduce the redundancy of the feature matrix, and preprocesses it to form a sample library. Subsequently, the signal feature matrix is used as the input, and the damage features are used as the output to construct a convolutional neural network(CNN) damage prediction model. This model is then combined with the bayesian optimization(BO) to adjust the hyperparameters of the model. Ultimately, the sample library is randomly divided into training set, validation set and test set according to the ratio of 8∶1∶1, using the validation set for hyper-parameter selection and the test set for model evaluation. The experimental results show that the constructed BO-CNN damage prediction model has better damage diagnosis capability relative to the CNN damage prediction model, the quantization accuracy is improved from 0.94 to 0.98, and the damage regression prediction task shows higher reliability.

Key words: structural health monitoring, fatigue damage, machine learning, convolutional neural network, Bayesian optimization

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