测试技术学报2025，Vol.39Issue(6)：646-653,8.DOI:10.62756/csjs.1671-7449.2025083
基于频谱分解和相谱增强方法的兰姆波相速度频散评估
Phase Velocity Dispersion Evaluation of Lamb Wave Based on Spectrum Decomposition and Phase Spectrum Enhancement Methods
摘要
Abstract
Lamb waves are widely used in non-destructive testing and structural health monitoring due to their advantages of long propagation distance,low attenuation,and high sensitivity to material defects and properties.Phase velocity,as one of the fundamental characteristics of Lamb waves,can be utilized for defect detection,material property estimation,and dispersion evaluation.Most existing phase velocity dis-persion reconstruction methods require the deployment of multiple sensor arrays,which are costly and complex to arrange.This paper proposes a hybrid method based on spectrum decomposition and phase spectrum enhancement,which reconstructs the phase velocity dispersion curves of Lamb waves using only two adjacent sensors.The proposed method was validated through simulations on both aluminum and CFRP plates,and further verified experimentally on CFRP plates.The results were compared with theo-retical values obtained from the semi-analytical finite element method.The findings demonstrate that the phase velocity dispersion curves of both the A0 and S0 modes of Lamb waves were successfully recon-structed,with a consistency rate of over 90%compared to the theoretical values.This method not only simplifies the measurement process but also enhances the accuracy and stability of dispersion curve recon-struction,providing a new technical approach for non-destructive testing and structural health monitoring.关键词
兰姆波/相速度/频散重建/频谱分解/相谱增强Key words
Lamb wave/phase velocity/dispersion reconstruction/spectrum decomposition/phase spec-trum enhancement分类
通用工业技术引用本文复制引用
任毅,蒋晓菡,俞燕萍,景健,张辉,郑凯..基于频谱分解和相谱增强方法的兰姆波相速度频散评估[J].测试技术学报,2025,39(6):646-653,8.基金项目
国家重点研发计划资助项目(2023YFC3010303) （2023YFC3010303）
国家自然科学基金资助项目(52272433) （52272433）
江苏省市场监督管理局技术项目(KJ2024024) （KJ2024024）
