中山大学学报（自然科学版）（中英文）2024，Vol.63Issue(2)：108-114,7.DOI:10.13471/j.cnki.acta.snus.2023B064
柔性曲拱振动测量的双尺度数字图像相关方法
Two-scale digital image correlation method for vibration measurement of flexible curved arch
摘要
Abstract
A two-scale digital image correlation method based on flexible curved arch is proposed in this paper.In integer pixel scale,the initial estimation of deformation parameters at pixel level is quickly found by Fourier transform.In sub-pixel scale,combined with pixel level initial estimation and inverse synthesis Gaussian-Newton iteration,the deformation measurement results with sub-pixel precision is obtained.After the vibration response of the structure is obtained,the natural frequency and mode of the structure are identified by frequency domain decomposition method.Finally,the visual measure-ment experiment was conducted on a flexible curved arch,supplemented by comparative analysis of laser vibration measurement,to verify the effectiveness of the proposed method in vibration measurement and modal identification of flexible structures.关键词
数字图像相关方法/双尺度位移恢复/柔性大变形结构/模态辨识Key words
digital image correlation/two-scale displacement recovery/flexible and large deforma-tion structure/modal identification分类
数理科学引用本文复制引用
李婉培,吕中荣,谢培悦,焦柯,汪利..柔性曲拱振动测量的双尺度数字图像相关方法[J].中山大学学报（自然科学版）（中英文）,2024,63(2):108-114,7.基金项目
广东省重点领域研发计划(2022B0101080001) （2022B0101080001）
国家自然科学基金(11972336) （11972336）
