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Open AccessArticle

Analysis for the Vibration Mechanism of the Spillway Guide Wall Considering the Associated-Forced Coupled Vibration

by Jijian Lian 1, Yan Zheng 1, Chao Liang 1,2,3,* and Bin Ma 1,*
1
State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China
2
Postdoctoral workstation, Yellow River Engineering Consulting Co., Ltd., Zhengzhou 450003, China
3
Postdoctoral Research Station of Water Conservancy Engineering, Hohai University, Nanjing 210098, China
*
Authors to whom correspondence should be addressed.
Appl. Sci. 2019, 9(12), 2572; https://doi.org/10.3390/app9122572
Received: 16 March 2019 / Revised: 31 May 2019 / Accepted: 22 June 2019 / Published: 25 June 2019
(This article belongs to the Section Acoustics and Vibrations)
During the flood discharge in large-scale hydraulic engineering projects, intense flow-induced vibrations may occur in hydraulic gates, gate piers, spillway guide walls, etc. Furthermore, the vibration mechanism is complicated. For the spillway guide wall, existing studies on the vibration mechanism usually focus on the vibrations caused by flow excitations, without considering the influence of dam vibration. According to prototype tests, the vibrations of the spillway guide wall and the dam show synchronization. Thus, this paper presents a new vibration mechanism of associated-forced coupled vibration (AFCV) for the spillway guide wall to investigate the dynamic responses and reveal coupled vibrational properties and vibrational correlations. Different from conventional flow-induced vibration theory, this paper considers the spillway guide wall as a lightweight accessory structure connected to a large-scale primary structure. A corresponding simplified theoretical model for the AFCV system is established, with theoretical derivations given. Then, several vibrational signals measured in different structures in prototype tests are handled by the cross-wavelet transform (XWS) to reveal the vibrational correlation between the spillway guide wall and the dam. Afterwards, mutual analyses of numeral simulation, theoretical derivation, and prototype data are employed to clarify the vibration mechanism of a spillway guide wall. The proposed mechanism can give more reasonable and accurate results regarding the dynamic response and amplitude coefficient of the guide wall. Moreover, by changing the parameters in the theoretical model through practical measures, the proposed vibration mechanism can provide benefits to vibration control and structural design. View Full-Text
Keywords: flow-induced vibration mechanism; spillway guide wall; associated-forced coupled vibration; theoretical model; prototype test; cross-wavelet transform flow-induced vibration mechanism; spillway guide wall; associated-forced coupled vibration; theoretical model; prototype test; cross-wavelet transform
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Lian, J.; Zheng, Y.; Liang, C.; Ma, B. Analysis for the Vibration Mechanism of the Spillway Guide Wall Considering the Associated-Forced Coupled Vibration. Appl. Sci. 2019, 9, 2572.

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