基于改进Elman神经网络的CFRP补强钢板界面脱粘预测研究

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摘要针对碳纤维复合材料（carbon fiber reinforced polymer, CFRP）补强钢结构出现内部界面脱粘损伤后难以观测的问题，结合Lamb波检测方法和神经网络提出了一种界面脱粘预测方法。搭建了基于Lamb波的CFRP补强钢板信号分析实验平台，利用ABAQUS软件建立了CFRP补强钢板的机电耦合有限元模型，并通过实验验证了有限元模型的准确性。将长方形和圆形两种脱粘形状的信号在时域和频域内进行分析，基于自适应遗传算法改进的Elman神经网络建立了CFRP补强钢板脱粘预测模型，并将与脱粘面积相关性较高的信号特征数据作为预测模型的特征数据。对预测模型进行性能测试，脱粘形状为长方形和圆形预测值的平均绝对百分比误差分别为3.03%和8.06%，结果表明改进的Elman网络对于脱粘损伤具有较好的预测精度。

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	王庆松1
	张玉1
	张洪雨1
	陈柏桦2

关键词 ：界面脱粘, Lamb波, 碳纤维复合材料, 脱粘预测, Elman神经网络

Abstract：Aiming at the problem that it is difficult to observe the internal interface debonding damage of carbon fiber composite (CFRP) strengthening steel structures, a method for interface debonding prediction using Lamb wave and neural networks was proposed. The experimental platform for the CFRP strengthening steel plate signal analysis based on Lamb wave was built. The electromechanical coupling finite element model was established using ABAQUS software, and the accuracy of the finite element model was verified by experiment. The signals obtained from the models with rectangular and circular debonding shapes were analyzed in the time and frequency domain. Based on the Elman neural network improved by the adaptive genetic algorithm, the prediction model for the debonding area of steel plate reinforced with CFRP was established. The signal feature data with a high correlation with the debonding area was used as the feature data for the prediction model. The performance of the prediction model is verified, and the mean absolute percentage error of the predicted debonding area for rectangular and circular debonding shapes is 3.03% and 8.06%, respectively, which show that the improved Elman network has better prediction accuracy for debonding.

Key words： interfacial debonding lamb waves carbon fiber reinforced polymer debonding prediction Elman neural network

收稿日期: 2023-02-22 出版日期: 2024-02-15

引用本文:

王庆松1，张玉1，张洪雨1，陈柏桦2. 基于改进Elman神经网络的CFRP补强钢板界面脱粘预测研究[J]. 振动与冲击, 2024, 43(3): 120-127.
WANG Qingsong1, ZHANG Yu1, ZHANG Hongyu1, CHEN Baihua2. Prediction of interfacial debonding of CFRP reinforced steel plate based on improved Elman neural network. JOURNAL OF VIBRATION AND SHOCK, 2024, 43(3): 120-127.

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http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2024/V43/I3/120

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