Effect of noise on output-only structural identification of beams

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Nabavian Seyed Rasoul; Davoodi Mohammad Reza; Navayi Neya Bahram; Mostafavian Seyedamin

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Journal Paper

Paper Information

Journal: JOURNAL OF STRUCTURAL AND CONSTRUCTION ENGINEERING Year:2020 | Volume:7 | Issue:3 Page(s): 20-34

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Information Journal Paper

Title

Effect of noise on output-only structural identification of beams

Author(s)

Nabavian Seyed Rasoul | Davoodi Mohammad Reza | Navayi Neya Bahram | Mostafavian Seyedamin | Issue Writer Certificate

Keywords

Structural identificationQ1

Output-only methodQ1

Contilever beamQ1

Signal to noise ratioQ1

Peak pickingQ1

Stochastic subspaceQ1

identificationQ1

Abstract

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.

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APA: Copy

Nabavian, Seyed Rasoul, Davoodi, Mohammad Reza, Navayi Neya, Bahram, & Mostafavian, Seyedamin. (2020). Effect of noise on output-only structural identification of beams. JOURNAL OF STRUCTURAL AND CONSTRUCTION ENGINEERING, 7(3 ), 20-34. SID. https://sid.ir/paper/405907/en

Vancouver: Copy

Nabavian Seyed Rasoul, Davoodi Mohammad Reza, Navayi Neya Bahram, Mostafavian Seyedamin. Effect of noise on output-only structural identification of beams. JOURNAL OF STRUCTURAL AND CONSTRUCTION ENGINEERING[Internet]. 2020;7(3 ):20-34. Available from: https://sid.ir/paper/405907/en

IEEE: Copy

Seyed Rasoul Nabavian, Mohammad Reza Davoodi, Bahram Navayi Neya, and Seyedamin Mostafavian, “Effect of noise on output-only structural identification of beams,” JOURNAL OF STRUCTURAL AND CONSTRUCTION ENGINEERING, vol. 7, no. 3 , pp. 20–34, 2020, [Online]. Available: https://sid.ir/paper/405907/en

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