Study on Random Decrement Signature Under Different Triggering Level and Length of Time History

Random Decrement Technique (RDT) is a widely used method to extract free decay response data by averaging time segments obtained under certain triggering condition from structural vibration response. And thus, different triggering condition will inevitably lead to different Random Decrement Signatur...

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Published inTopics in Modal Analysis & Testing, Volume 10 pp. 159 - 166
Main Authors Wu, Jinzhi, Zheng, Xiujuan, Hu, Jie, Zhang, Yigang, Yuan, Fuh-Gwo
Format Book Chapter
LanguageEnglish
Published Switzerland River Publishers 01.01.2017
Springer International Publishing AG
Springer International Publishing
Edition1
SeriesConference Proceedings of the Society for Experimental Mechanics Series
Subjects
CIVIL ENGINEERING, SURVEYING & BUILDING
Dynamics & vibration
Length of time history
Mechanical engineering
Modal parameters
Random decrement technique
Space truss
Triggering level
Random decrement technique
Triggering level
Length of time history
Modal parameters
Space truss
Online AccessGet full text
ISBN3319548093
9783319854892
3319854895
9783319548098
ISSN2191-5644
2191-5652
DOI10.1007/978-3-319-54810-4_17

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Abstract Random Decrement Technique (RDT) is a widely used method to extract free decay response data by averaging time segments obtained under certain triggering condition from structural vibration response. And thus, different triggering condition will inevitably lead to different Random Decrement Signature (RDS) and different modal parameters. The quality of RDS has significant influence on the modal parameter identification results. Based on three assessments criteria for RDS's quality, statistical analysis of change law of RDS with different triggering level and length of time history are carried out by a SDOF system and a 6-DOF system. A multi-triggering method is proposed, by which a better RDS can be obtained. Numerical simulation and the practical engineering application verified the recommended method and values.
AbstractList Random Decrement Technique (RDT) is a widely used method to extract free decay response data by averaging time segments obtained under certain triggering condition from structural vibration response. And thus, different triggering condition will inevitably lead to different Random Decrement Signature (RDS) and different modal parameters. The quality of RDS has significant influence on the modal parameter identification results. Based on three assessments criteria for RDS's quality, statistical analysis of change law of RDS with different triggering level and length of time history are carried out by a SDOF system and a 6-DOF system. A multi-triggering method is proposed, by which a better RDS can be obtained. Numerical simulation and the practical engineering application verified the recommended method and values.
Author Yuan, Fuh-Gwo
Hu, Jie
Wu, Jinzhi
Zheng, Xiujuan
Zhang, Yigang
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Keywords Random decrement technique
Triggering level
Length of time history
Modal parameters
Space truss
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Snippet Random Decrement Technique (RDT) is a widely used method to extract free decay response data by averaging time segments obtained under certain triggering...
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StartPage 159
SubjectTerms CIVIL ENGINEERING, SURVEYING & BUILDING
Dynamics & vibration
Length of time history
Mechanical engineering
Modal parameters
Random decrement technique
Space truss
Triggering level
Title Study on Random Decrement Signature Under Different Triggering Level and Length of Time History
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