摘要
在复合材料的实际损伤检测过程中,基线数据难以获取且不可避免地受到操作和环境条件的影响,导致检测难度增加。通过基于Lamb波空间反演对称破坏原理的无基线方法对复合材料平板进行多损伤定位。通过交换激励接收换能器顺序,获得正-反向传播Lamb波中的直达波包,并进行信号幅值和相位的差异性分析,有效提取损伤路径。然后,采用DBSCAN和K-means聚类算法对缺陷进行定位。通过实验验证了该方法的有效性,并与传统概率成像算法进行对比分析。结果表明,相比于概率成像算法,该方法定位精度得到明显提升。此外,通过对平行阵列的优化有效解决了检测区域存在盲区的问题,并结合D-K算法实现了复合材料板单缺陷和双缺陷的定位。
In the actual damage detection process of composite materials,the baseline data is difficult to obtain and inevitably affected by the operation and environmental conditions,which makes the detection more difficult.Based on the symmetry failure principle of Lamb wave space inversion,the non-baseline method was used to locate the multi-damage of composite plate structures.Through the exchange excitation to receive the transducer sequence,the direct wave packet in the forward-back propagation Lamb wave was obtained,and the difference of signal amplitude and phase was analyzed,the damage path was extracted effectively.Then the defect was located by DBSCAN and K-means cluster algorithm.The effectiveness of the method was verified by experiments,and the traditional probabilistic imaging algorithm was compared with the clustering algorithm.The results show that,compared with the probabilistic imaging algorithm,the positioning accuracy is obviously improved.In addition,the problem of blind area in the detection area is effectively solved by optimizing the parallel array,and the single defect and double defect location of the composite plate is realized by combining the D-K algorithm.
作者
戴中豪
周邵萍
罗志
李沁霏
李锦良
DAI Zhonghao;ZHOU Shaoping;LUO Zhi;LI Qinfei;LI Jinliang(Key Laboratory of Pressurized System and Safety,Ministry of Education,East China University of Science and Technology,Shanghai 200237,China)
出处
《复合材料科学与工程》
北大核心
2025年第1期59-66,108,共9页
Composites Science and Engineering
基金
国家重点研发计划(2021YFB400800)
青年基金(52205151)。
关键词
复合材料
空间反演对称
无基线
聚类算法
LAMB波
composite materials
spatial inversion symmetry
baseless
clustering algorithm
Lamb wave
