陕西师范大学学报（自然科学版）2024，Vol.52Issue(2)：43-50,8.DOI:10.15983/j.cnki.jsnu.2024303
基于PVDF梳状换能器的零群速度Lamb波层合板损伤检测的数值研究
Numerical investigation on damage detection of ZGV Lamb waves in laminated plates based on PVDF comb transducers
摘要
Abstract
In order to improve the accuracy and sensitivity of damage detection in laminated plates,a damage detection method is proposed based on zero group velocity(ZGV)Lamb waves excited by polyvinylidene fluoride(PVDF)comb transducers.The two dimensional time domain finite element method is used to study the excitation of the ZGV Lamb waves by PVDF comb transducers.By changing Young's modulus of the aluminum layer in laminated plates to characterize different damaged degrees,the relationship between the voltage response characteristics of PVDF comb transducers and the damage degree is analyzed.The results show that PVDF comb transducers can effectively excite the ZGV Lamb waves and detect the damaged degree of laminated plates.As the damage degree increases,the ZGV resonance peak amplitude response by the PVDF comb transducers in the frequency domain decreases significantly with decreasing Young's modulus of the aluminum layer,so as to evaluate the change of damage in the laminated plates sensitively.The optimized PVDF comb transducers have advantages in the excitation and reception performance of ZGV Lamb waves,which further improves the accuracy and sensitivity of damage detection in laminated plates.关键词
损伤检测/PVDF/梳状换能器/零群速度Lamb波/杨氏模量变化Key words
damage detection/PVDF/comb transducers/ZGV Lamb waves/variation of Young's modulus分类
数理科学引用本文复制引用
郭帅,尹莘新,邓明晰..基于PVDF梳状换能器的零群速度Lamb波层合板损伤检测的数值研究[J].陕西师范大学学报（自然科学版）,2024,52(2):43-50,8.基金项目
国家自然科学基金(12134002) （12134002）
