Failure analysis of a leaf gate jammed in closing process

Ma, Chao; Sheng, Chuanming; Lian, Jijian; Ma, Bin; Liu, Fang

doi:10.1016/j.engfailanal.2020.104391

Cited by 6 publications

(2 citation statements)

References 13 publications

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“…The emergency gate in the closing process often experienced crawl vibrations with intermittent movement or failure of gate-closing [14]. Thus, the characteristics of the closing process is the focus of this study.…”

Section: Operation Conditionmentioning

confidence: 99%

Holding Force and Vertical Vibration of Emergency Gate in the Closing Process: Physical and Numerical Modelling

Wang

Liu

2021

Applied Sciences

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A two-dimensional unsteady fluid–structure interaction numerical model was established, based on the physical model test, to investigate the influence of vertical vibration on the holding force of an emergency gate in the closing process. Gate motion was controlled by the user-defined function in Fluent. Attention was paid to the relationship between the vertical vibration, hydrodynamic loads and flow discharge. The experiment results show that holding force has three typical forms in the closing process and it is related to the service gate height. The numerical model can reflect the gate vertical vibration and the gate-closing displacement in the form of steps. Gate vertical vibration in the closing process is a motion-induced vibration caused by gate active falling. Moreover, the transition from full-flow to open-flow behind the emergency gate has a great influence on the gate vertical vibration. With a small gate opening, gate vertical vibration makes the flow discharge fluctuation increase. Furthermore, flow discharge has an influence on the gate body loads, which is mainly concentrated in the upstream plate and gate bottom. Finally, the lift force coefficient at the gate bottom is different from the standard and is mainly controlled by the outflow boundary condition. The simulation result is in good agreement with the experiment and the relative error meets engineering requirements, suggesting that the numerical model can successfully simulate the gate fluid–structure interaction and reproduce the characteristics of physical quantities in the closing process.

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Section: Operation Conditionmentioning

confidence: 99%

Holding Force and Vertical Vibration of Emergency Gate in the Closing Process: Physical and Numerical Modelling

Wang

Liu

2021

Applied Sciences

Self Cite

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“…Flow-induced vibration of a plane gate is a common phenomenon in water conservancy engineering that can alter the flow field around the gate and subsequently lead to fluid-structure coupling [1][2][3]. Several mechanisms have been proposed to describe and explain the complex relationships among flow characteristics, fluid excitation and gate motion.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Slip–Stick Vibration of Plane Gate

Wang,

Xu,

Liu

et al. 2024

Water

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The slip–stick vibration intensity of a plane gate is usually large, which often brings serious safety risks to itself and the auxiliary structure. The slip–stick vibration of a plane gate is investigated using an experimental model test. The test conditions mainly focus on the gate-closing and gate-opening processes in transient flow. Based on the results, comparison diagrams of the slip–stick vibration response versus the external fluid excitation are constructed. The intensity and period of the slip–stick vibration both gradually increase with the opening degree of the plane gate decreasing. The frequency of slip–stick vibration is consistent with the natural frequency of the equivalent system, indicating that the slip–stick vibration is a nonlinear self-excited vibration. The slip–stick vibration and fluid excitation acting on the plane gate have a significant difference in response intensity and dominant frequency. In addition, a difference in gate support material can have a significant effect on the slip–stick vibration intensity. Therefore, the friction factor between gate support and track, rather than the fluid excitation, is the direct cause of slip–stick vibration, which can further prove that the slip–stick vibration is a friction-induced vibration caused by the gate’s active motion, enriching the theory of the gate’s vibration.

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Dynamic failures of water controlling radial gates of hydro-power plants: Advancements and future perspectives

Liu

Chen

et al. 2023

Engineering Failure Analysis

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Failure analysis of a leaf gate jammed in closing process

Cited by 6 publications

References 13 publications

Holding Force and Vertical Vibration of Emergency Gate in the Closing Process: Physical and Numerical Modelling

Holding Force and Vertical Vibration of Emergency Gate in the Closing Process: Physical and Numerical Modelling

Experimental Study on the Slip–Stick Vibration of Plane Gate

Dynamic failures of water controlling radial gates of hydro-power plants: Advancements and future perspectives

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