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Modal testing

About: Modal testing is a research topic. Over the lifetime, 4047 publications have been published within this topic receiving 64772 citations.


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Journal ArticleDOI
TL;DR: In this article, experimental modal analysis was conducted on the specimens previously subjected to fatigue loading to determine the modal parameters (natural frequency, damping ratio and mode shape) and the results showed that the changes of modality parameters provided a proper means for predicting the fatigue behavior of composite structures.

38 citations

Journal ArticleDOI
TL;DR: In this paper, the authors examined the characteristics of modal damping of cable-stayed bridges in detail, in order to investigate the characteristics and mode dependency of structural damping.

38 citations

Journal ArticleDOI
TL;DR: An alternate approach is proposed which utilizes frequency and shape information acquired from modal testing to update reduced order finite element models using exact analytical model improvement techniques.

38 citations

01 Jan 1997
TL;DR: In this article, a comparative study on the postprocessing of experimental modal data from a large scale steel stringer bridge for damage identification is presented, and the results in both modal and flexibility space are presented.
Abstract: A comparative study on the postprocessing of experimental modal datafrom afull scale steel stringer bridge for damage identification is presented. The bridge was tested before and aJ2er removal of one of the bearing plates at one abutment Frequency Response Functions, measured cd different spatial locaiions, are used to post-process the data using a Complex Mode Indicator Furution(CMlF) algorithm. Dynamic properties of the bn’dge show major differences between the two cases. In addition, modal flexibility of the bridge is calculated for the measured degrees of freedom. Modal flexibility of the btidge shows good agreement with static instrumentation results under truck loading The induced damage is successfully quantified for this loading case. The “after-removal” condition doia was also post-processed a t Las Alamos N a t i o n a l Laborcdory u s i n g t h e Eigensystem Realization Algolithm (ERA) in order to provide a distant check and correlation for the results. T h i s p a p e r b r i e f l y desctibes t h e t w o d i f f e r e n t algorithms and presents the results in both modal and flexibility space. Further, the principal focus of this paper is the pas-processing algorithms and one damage index, although a number of different damage identifcaiion indices are being used for varying levels and types of damage as part of the ongoing research project

37 citations

Journal ArticleDOI
TL;DR: In this paper, the authors presented the finite element calibration of Berke Arch Dam by using Operational Modal Testing (OMT) and ANSYS software, and analytically determined vibration characteristics such as natural frequencies and mode shapes.
Abstract: This paper presents the finite element calibration of Berke Arch Dam by using Operational Modal Testing. Achievement of this purpose involves structural vibration characteristics of Berke Arch Dam using analytical and Operational Modal Analyses. Therefore, the study has two parts — analytical and experimental. In the analytical part of the study, the authors developed a 3D finite element model of Berke Arch Dam-reservoir-foundation system using ANSYS software, and analytically determined vibration characteristics such as natural frequencies and mode shapes. In the experimental part of the study, sensitive accelerometers were placed to several points of Berke Arch Dam, and ambient vibration tests were conducted over four days to obtain dynamic characteristics. The Enhanced Frequency Domain Decomposition technique is used to estimate natural frequencies, mode shapes and damping ratios of the Berke Arch Dam experimentally. Results showed that there were some differences between analytical and experimental na...

37 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202367
2022164
202141
202059
201967
201878