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© 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

Highlights

  • An new analysis method for vibration-transmission paths based on CEEMDAN-SVD-TE is proposed.

  • It is verified that the CEEMDAN-SVD-TE method has higher effectiveness and is superior to the single TE algorithm.

  • The feasibility of CEEMDAN-SVD-TE in practical engineering is verified by engineering examples from the Quxue hydropower house.

  • By using the information-transmission rate, it is identified that the lower frame foundation is an essential node for vibration transmission.

Abstract

The analysis of the vibration-transmission path is one of the keys to the vibration control and safety monitoring of a hydropower house, and the vibration source of the hydropower house is complex, making it more difficult to analyze the vibration-transmission path. In order to accurately identify the transmission path of the vibration in a hydropower house, an identification method for the vibration-transmission path based on CEEMDAN-SVD-TE is presented in this paper. First of all, this paper verifies that the CEEMDAN-SVD-TE method has higher effectiveness and is superior to the single transfer-entropy (TE) algorithm in information-transmission-direction identification; secondly, based on the measured field-vibration data, CEEMDAN-SVD noise-reduction technology is used to adaptively decompose the characteristics according to the signal energy; finally, the transfer-entropy theory and the information-transmission rate are used to determine the vibration-transmission path of the hydropower house. The results show that the main transmission path of the vibration caused by tailwater fluctuation is tailwater pipe (top cover measurement point)→turbine pier (stator foundation measurement point, lower frame foundation measurement point)→generator floor (generator floor measurement point). This research can offer a reference for vibration control and safety monitoring of hydropower houses, and provide a new idea for structural vibration reduction.

Details

Title
Study on Vibration-Transmission-Path Identification Method for Hydropower Houses Based on CEEMDAN-SVD-TE
Author
Zhang, Jianwei 1   VIAFID ORCID Logo  ; Li, Ziyu 1 ; Huang, Jinlin 2 ; Cheng, Mengran 1 ; Li, Huokun 3 

 School of Water Resources, North China University of Water Resources and Electric Power, Zhengzhou 450046, China; [email protected] (J.Z.); [email protected] (M.C.) 
 Guangdong Research Institute of Water Resources and Hydropower, Guangzhou 510610, China; [email protected] 
 School of Civil Engineering and Architecture, Nanchang University, Nanchang 330031, China; [email protected] 
First page
7455
Publication year
2022
Publication date
2022
Publisher
MDPI AG
e-ISSN
20763417
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2700542028
Copyright
© 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.