Effect of noise on output-only structural identification of beams

Output-only structural identification is conducted by output data of the structure. These data usually include structural response together with some noise. Success of output-only methods in determining the vibration parameters of a structure depends on the signal to noise ratio (SNR) of the output...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Seyed Rasoul Nabavian, Mohammad Reza Davoodi, Bahram Navayi Neya, Seyed amin Mostafavian
Formato:	article
Lenguaje:	FA
Publicado:	Iranian Society of Structrual Engineering (ISSE) 2020
Materias:	structural identification output-only method contilever beam signal to noise ratio peak picking stochastic subspace identification Bridge engineering TG1-470 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/4f5e9ea23b6940af96faa2f8de75f221
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:4f5e9ea23b6940af96faa2f8de75f221
record_format	dspace
spelling	oai:doaj.org-article:4f5e9ea23b6940af96faa2f8de75f2212021-11-08T15:53:20ZEffect of noise on output-only structural identification of beams2476-39772538-261610.22065/jsce.2018.130329.1555https://doaj.org/article/4f5e9ea23b6940af96faa2f8de75f2212020-09-01T00:00:00Zhttps://www.jsce.ir/article_70567_6717d9adfed4ef6c60554e5cb1fcc4f3.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616Output-only structural identification is conducted by output data of the structure. These data usually include structural response together with some noise. Success of output-only methods in determining the vibration parameters of a structure depends on the signal to noise ratio (SNR) of the output data. In this paper, the vibration parameters (Natural frequency and Mode shape) of a contilever beam have been obtained using output data which have different signal to noise ratios. The vibration parameters of the beam were determined using modal analysis of finite element model and considered as reference parameters. Then, appropriate input was applied to the beam and the acceleration signal was obtained. To generate noisy data, noise with different powers compared to signal powers were added to acceleration signal. The modal parameters of the beam were obtained using two output-only methods, Peak Picking (PP) and Stochastic Subspace Identification (SSI). The vibration parameters having signal-to-noise ratios greater than 25 (lower noise level) for all considered modes were identified properly. At a signal-to-noise ratio of 0.25 to 25 (higher noise level), it was not possible to identify the modal parameters of the first mode of the beam, but the parameters of the higher modes were identified with good accuracy.Seyed Rasoul NabavianMohammad Reza DavoodiBahram Navayi NeyaSeyed amin MostafavianIranian Society of Structrual Engineering (ISSE)articlestructural identificationoutput-only methodcontilever beamsignal to noise ratio peak pickingstochastic subspace identificationBridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 7, Iss 3, Pp 20-34 (2020)
institution	DOAJ
collection	DOAJ
language	FA
topic	structural identification output-only method contilever beam signal to noise ratio peak picking stochastic subspace identification Bridge engineering TG1-470 Building construction TH1-9745
spellingShingle	structural identification output-only method contilever beam signal to noise ratio peak picking stochastic subspace identification Bridge engineering TG1-470 Building construction TH1-9745 Seyed Rasoul Nabavian Mohammad Reza Davoodi Bahram Navayi Neya Seyed amin Mostafavian Effect of noise on output-only structural identification of beams
description	Output-only structural identification is conducted by output data of the structure. These data usually include structural response together with some noise. Success of output-only methods in determining the vibration parameters of a structure depends on the signal to noise ratio (SNR) of the output data. In this paper, the vibration parameters (Natural frequency and Mode shape) of a contilever beam have been obtained using output data which have different signal to noise ratios. The vibration parameters of the beam were determined using modal analysis of finite element model and considered as reference parameters. Then, appropriate input was applied to the beam and the acceleration signal was obtained. To generate noisy data, noise with different powers compared to signal powers were added to acceleration signal. The modal parameters of the beam were obtained using two output-only methods, Peak Picking (PP) and Stochastic Subspace Identification (SSI). The vibration parameters having signal-to-noise ratios greater than 25 (lower noise level) for all considered modes were identified properly. At a signal-to-noise ratio of 0.25 to 25 (higher noise level), it was not possible to identify the modal parameters of the first mode of the beam, but the parameters of the higher modes were identified with good accuracy.
format	article
author	Seyed Rasoul Nabavian Mohammad Reza Davoodi Bahram Navayi Neya Seyed amin Mostafavian
author_facet	Seyed Rasoul Nabavian Mohammad Reza Davoodi Bahram Navayi Neya Seyed amin Mostafavian
author_sort	Seyed Rasoul Nabavian
title	Effect of noise on output-only structural identification of beams
title_short	Effect of noise on output-only structural identification of beams
title_full	Effect of noise on output-only structural identification of beams
title_fullStr	Effect of noise on output-only structural identification of beams
title_full_unstemmed	Effect of noise on output-only structural identification of beams
title_sort	effect of noise on output-only structural identification of beams
publisher	Iranian Society of Structrual Engineering (ISSE)
publishDate	2020
url	https://doaj.org/article/4f5e9ea23b6940af96faa2f8de75f221
work_keys_str_mv	AT seyedrasoulnabavian effectofnoiseonoutputonlystructuralidentificationofbeams AT mohammadrezadavoodi effectofnoiseonoutputonlystructuralidentificationofbeams AT bahramnavayineya effectofnoiseonoutputonlystructuralidentificationofbeams AT seyedaminmostafavian effectofnoiseonoutputonlystructuralidentificationofbeams
_version_	1718441564338913280

Effect of noise on output-only structural identification of beams

Ejemplares similares