Two-dimensional optical coherence vibration tomography for low-frequency vibration measurement and response-only modal analysis

被引：10

作者：

Zhong, Jianfeng ^{[1
]}

Zhong, Shuncong ^{[1
,2
]}

Zhang, Qiukun ^{[1
]}

机构：

[1] Fuzhou Univ, Sch Mech Engn & Automat, Lab Opt Terahertz & Nondestruct Testing, Fuzhou 350108, Peoples R China

[2] Univ Strathclyde, Dept Naval Architecture Ocean & Marine Engn, Glasgow G4 0LZ, Lanark, Scotland

来源：

MECHANICAL SYSTEMS AND SIGNAL PROCESSING | 2016年 / 79卷

基金：

高等学校博士学科点专项科研基金; 中国国家自然科学基金;

关键词：

Two-dimensional optical coherence tomography; Line vibration measurement; Three-dimension surface vibration; Modal analysis; LASER-DOPPLER VIBROMETRY; DAMAGE;

D O I：

10.1016/j.ymssp.2016.02.027

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

A high-speed camera-based two-dimensional optical coherence vibration tomography (2DOCVT) system with a subnanometre displacement resolution was developed and employed for low-frequency vibration measurement and modal analysis. Experimental results demonstrated the ability of low-frequency absolute displacement measurement of structural line vibrations without scanning. Three-dimensional (3D) surface displacement of a vibrating structure could also be obtained using the developed 2DOCVT by scanning the structure. The scanning 2DOCVT system acted like a 3D optical coherence vibration tomography system. The developed 2DOCVT system could capture structural modal parameters without vibration excitation input information, and therefore, it is a response only method. The 2DOCVT could be recommended in the application of low-frequency vibration measurement and modal analysis of beam and plate structures, especially when the vibration amplitude is at nanometre or micrometre scale. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：65 / 71

页数：7

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