Collaborative Research: Three-dimensional Continuously Scanning Laser Vibrometry with Application to Structural Damage Detection

合作研究：三维连续扫描激光测振法在结构损伤检测中的应用

• 批准号: 1763024
• 负责人: Weidong Zhu
• 金额: $ 25.23万
• 依托单位: University of Maryland Baltimore County
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1763024&HistoricalAwards=false
• 关键词: Collaborative; Research; Three; dimensional; Continuously

The laser vibrometer is a state-of-art-art instrument used to characterize vibration of a structure. This information is important to evaluate the correctness of design of structures that routinely experience vibration; to identify areas of concern for maintenance and repairs of those structures before failure occurs; and to pinpoint the location and mode of failure of the structures, if pre-failure remediation is not undertaken or is insufficient. This technique, however, is very tedious and time-consuming for measurement of structures with complex configurations. These may include large structures subject, for example, to ongoing loading from wind, or flowing water, or the steady flow of traffic. This project aims to develop a continuously scanning laser vibrometry method for accurate and rapid characterization of vibrations of structures with complex configurations. The ultimate application of this research will advance the national prosperity and defense by providing early warnings of the need for maintenance and repair of structures, or of the onset of failures of critical structures. This can reduce potential economic and human losses, in addition to advancing knowledge in the field of measurement science. Outcomes of this project will also be demonstrated to underserved high school students in a summer educational program to spark their interest in science and engineering.Overarching objectives of this project are to investigate full-field three-dimensional continuously scanning laser vibrometry and apply it to non-model-based structural damage detection. Laser vibrometry can measure three-dimensional vibrations of structures with curved surfaces and time-varying positions and orientations, and estimate their vibration shapes that can be used for damage detection when structures are under ambient excitation. Scan trajectories of three laser spots need to be synchronized, which requires derivation of kinematic relations between a prescribed scan trajectory and each laser spot. Non-image-based and image-based methods will be developed to obtain them. New output-only vibration shape measurement methods will be developed for structures under ambient excitation. A robust and efficient non-model-based damage detection method that uses different types of vibration shapes measured by laser vibrometry will be developed. The damage detection method is robust, practical and versatile, and does not require any baseline information of structures, such as their dimensions and boundary conditions, and vibration shapes of corresponding undamaged structures.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

激光测振仪是一种用于表征结构振动的先进仪器。这些信息对于评估经常经历振动的结构设计的正确性非常重要；在这些建筑物出现故障之前，确定维修和维修的关注范围；并查明结构的故障位置和模式，如果没有采取或不充分的故障前补救措施。然而，这种方法对于复杂结构的测量是非常繁琐和耗时的。这些可能包括大型结构，例如，受到风、流水或稳定交通流量的持续载荷。本项目旨在开发一种连续扫描激光振动测量方法，以准确、快速地表征复杂结构的振动。这项研究的最终应用将通过提供结构维护和维修需求的早期预警，或关键结构失效的开始，促进国家的繁荣和国防。这可以减少潜在的经济和人员损失，并促进测量科学领域的知识。这个项目的成果也将在一个暑期教育项目中向缺乏服务的高中生展示，以激发他们对科学和工程的兴趣。本课题的主要目标是研究全视野三维连续扫描激光振动测量技术，并将其应用于非基于模型的结构损伤检测。激光测振可以测量具有曲面和时变位置和方向的结构的三维振动，并估计其振动形状，用于结构在环境激励下的损伤检测。三个激光光斑的扫描轨迹需要同步，这就需要推导出指定的扫描轨迹与每个激光光斑之间的运动关系。将开发非基于图像和基于图像的方法来获取它们。新的仅输出的振动形状测量方法将用于环境激励下的结构。本文将开发一种鲁棒且高效的非基于模型的损伤检测方法，该方法利用激光测振仪测量的不同类型的振动形状。该方法具有鲁棒性好、实用性强、通用性强的特点，不需要结构的尺寸、边界条件、相应的未损伤结构的振动形态等基础信息。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Identification of modal parameters of a model turbine blade with a curved surface under random excitation with a three-dimensional continuously scanning laser Doppler vibrometer system

三维连续扫描激光多普勒测振系统识别随机激励下曲面模型涡轮叶片模态参数

• DOI: 10.1016/j.measurement.2023.112759
• 发表时间: 2023
• 期刊: Measurement
• 影响因子: 5.6
• 作者: Yuan, K.;Zhu, W.D.
• 通讯作者: Zhu, W.D.

Local damage detection of membranes based on Bayesian operational modal analysis and three-dimensional digital image correlation

• DOI: 10.1016/j.ymssp.2019.04.051
• 发表时间: 2019-09-15
• 期刊: MECHANICAL SYSTEMS AND SIGNAL PROCESSING
• 影响因子: 8.4
• 作者: Hu, Yujia;Guo, Weigong;Xu, Yongfeng
• 通讯作者: Xu, Yongfeng

A Comparative Study on Structural Damage Detection Using Derivatives of Laser-Measured Flexural and Longitudinal Vibration Shapes

使用激光测量的弯曲和纵向振动形状的导数进行结构损伤检测的比较研究

• DOI: 10.1007/s10921-020-00702-4
• 发表时间: 2020-07
• 期刊: Journal of Nondestructive Evaluation
• 影响因子: 2.8
• 作者: Xu Wei;Zhu Weidong;Xu Yongfeng;Cao Maosen
• 通讯作者: Cao Maosen

Operational modal analysis using lifted continuously scanning laser Doppler vibrometer measurements and its application to baseline-free structural damage identification

• DOI: 10.1177/1077546318821154
• 发表时间: 2019-04-01
• 期刊: JOURNAL OF VIBRATION AND CONTROL
• 影响因子: 2.8
• 作者: Xu, Y. F.;Chen, Da-Ming;Zhu, W. D.
• 通讯作者: Zhu, W. D.

Operational modal analysis of a rotating structure under ambient excitation using a tracking continuously scanning laser Doppler vibrometer system

• DOI: 10.1016/j.ymssp.2020.107367
• 发表时间: 2021-05
• 期刊: Mechanical Systems and Signal Processing
• 影响因子: 8.4
• 作者: L. Lyu;Wei-dong Zhu