测试技术学报2025，Vol.39Issue(3)：267-275,283,10.DOI:10.62756/csjs.1671-7449.2025033
基于光纤光栅和小波包变换的复合材料板状结构的冲击能量辨识方法
Impact Energy Identification Method of Composite Plate Structure Based on FBG and Wavelet Packet Transform
摘要
Abstract
To identify the impact energy of composite materials efficiently,an impact energy classification method based on fiber Bragg grating(FBG)sensor and wavelet packet energy was proposed.Firstly,the impact load test system was built with the carbon fiber reinforced polymer(CFRP)lamellar structure as the experimental object,and the grid area of the composite plate was divided.The FBG sensor was implanted inside the composite plate to establish the strain-temperature sensor network.By adjusting the height of the drop hammer,the impact loading experiments of 5,10 and 15 J CFRP plates were carried out.In the experiment system,the impact signal was collected and converted into a strain signal by the FBG sensor.Then,the response signal data is decomposed by wavelet packet transformation,and the energy ratio of each frequency band is calculated.At the same time,the ultrasonic damage analysis of the composite plate after the impact load was carried out to verify that the structural damage degree caused by different energy impacts was different.Finally,according to the energy ratio of the frequency band,the classification characteristics of the impact energy were screened to realize the division of different impact energies,and the verification was carried out.The experimental results show that this method has simple calculation steps and an energy classification accuracy of 88.9%,which has certain engineering application value.关键词
复合材料/光纤光栅传感器/小波包变换/冲击能量辨识Key words
composite materials/fiber Bragg grating sensors/wavelet packet transform/impact energy identification分类
计算机与自动化引用本文复制引用
徐忠宣,张思思,王玉儒,张雷..基于光纤光栅和小波包变换的复合材料板状结构的冲击能量辨识方法[J].测试技术学报,2025,39(3):267-275,283,10.基金项目
国家自然科学基金资助项目(62273206) （62273206）
