Cause investigation of high-mode vortex-induced vibration in a long-span suspension bridge

Hwang, You Chan; Kim, Sun-Joong; Kim, Ho-Kyung

doi:10.1080/15732479.2019.1604771

“…When the frequency of vortex shedding is close to the natural frequency of the bridge, VIV may be excited. The VIV of bridge has the following characteristics: (1) VIV is usually a limited amplitude vibration at low wind speed; (2) When the excitation frequency is close to the natural frequency of the bridge, the VIV locking phenomenon will occur, which will make the bridge vibrate greatly; (3) The vibration amplitude is related to bridge section shape, damping, mass and Schmidt number; (4) The vortex shedding can also cause bending vibration and torsion vibration.…”

Section: Monitoring and Perception Based On Characteristics Of Viv Si...mentioning

confidence: 99%

“…According to the research of khalak et al [17], the amplitude coefficient 𝑎(𝑡) of VIV is affected by the phase difference between the structural displacement response and the vortex induced force, which is an amplitude modulated signal that changes slowly with time and can be written as: 𝑎(𝑡) = 𝑎 0 + ∑ 𝑎 𝑚 𝑐𝑜𝑠(𝜔 𝑚 𝑡 + 𝜙 𝑚 ) 𝑀 𝑚=1 (4) Where 𝑎 0 is the initial amplitude, 𝑎 𝑚 , 𝜔 𝑚 and 𝜙 𝑚 are the amplitude, frequency and phase of the m-th AM signal component respectively, and M is the number of AM signal components. Under the condition of single-mode narrow-band signal, 𝜔 𝑚 ≪ 𝜔.…”

Section: Monitoring and Perception Based On Characteristics Of Viv Si...mentioning

confidence: 99%

“…VIV events have occurred in many cable-supported bridges in recent years, such as the Yi Sun-sin bridge in South Korea, the Xihoumen Bridge in China, and the Great Belt Bridge in Denmark, etc. [2,4,5]. This kind of event often causes widespread social concern and discussion.…”

Section: Introductionmentioning

confidence: 99%

“…3 For bridge structures, VIV directly affects driving comfort and safety. VIV events have occurred in many cable-supported bridges in recent years, such as the Yi Sun-sin Bridge in South Korea, the Xihoumen Bridge in China, and the Great Belt Bridge in Denmark, 2,4,5 and this kind of event often causes widespread social concern. However, based on the cognition that bridge VIVs are classified as limited-amplitude vibrations, this type of vibration is allowed to occur in the bridge design process, and it is mainly controlled by limiting the maximum amplitude.…”

Section: Introductionmentioning

confidence: 99%

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Monitoring, intelligent perception, and early warning of vortex‐induced vibration of suspension bridge

Dan

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Li

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2022

Structural Contr & Hlth

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Vortex-induced vibration(VIV) is a serious problem of suspension bridges and other long-span bridges during the service period. It can cause the excessive amplitude of the structure under low wind speed, which not only affects the driving comfortableness and safety but also makes the structure face the risk of fatigue failure. The previous research on the identification and evaluation of bridge VIV events during the service period is based on the offline batch processing and analysis of monitoring data, which can not realize real-time perception, calculation, and early warning online. In this paper, according to the vibration characteristics of single-mode sinusoidal-like vibration of engineering structure during VIV, an intelligent monitoring and early warning method for VIV of suspension bridge based on recursive Hilbert transform is proposed. Firstly, the real-time acceleration integral algorithm is used to realize the real-time calculation from the acceleration monitoring data to the dynamic displacement of the stiffening beam, and then the recursive Hilbert transform is used to obtain the real-time analytical signal of the structural displacement during VIV; based on its single-mode near-circular trajectory characteristic, the VIV index and the real-time analysis method are proposed to characterize the development trend of VIV events. This online extraction algorithm can realize the first time warning and the whole process tracking and perception of VIV events. Furthermore, this article also provides a real-time online identification method of key motion parameters such as the instantaneous frequency, phase and amplitude of the structure during VIV, which lays a foundation for real-time monitoring of the whole process of VIV and further evaluation and management decision-making. The accuracy, reliability and engineering feasibility of the proposed method are verified by numerical simulation and VIV monitoring data of a real bridge.

show abstract

“…When the frequency of vortex shedding is close to the natural frequency of the bridge, VIV may be excited. The VIV of bridge has the following characteristics: (1) VIV is usually a limited amplitude vibration at low wind speed; (2) When the excitation frequency is close to the natural frequency of the bridge, the VIV locking phenomenon will occur, which will make the bridge vibrate greatly; (3) The vibration amplitude is related to bridge section shape, damping, mass and Schmidt number; (4) The vortex shedding can also cause bending vibration and torsion vibration.…”

Section: Monitoring and Perception Based On Characteristics Of Viv Signals 11 Characteristics Of Structures Viv Response Signalmentioning

confidence: 99%

Monitoring, intelligent perception and early warning of vortex-induced vibration of suspension bridge

Dan¹,

Li²

2021

Preprint

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View full text Add to dashboard Cite

Vortex-induced vibration(VIV) is a serious problem of suspension bridges and other long-span bridges during the service period. It can cause the excessive amplitude of the structure under low wind speed, which not only affects the driving comfortableness and safety but also makes the structure face the risk of fatigue failure. The previous research on the identification and evaluation of bridge VIV events during the service period is based on the offline batch processing and analysis of monitoring data, which can not realize real-time perception, calculation, and early warning online. In this paper, according to the vibration characteristics of single-mode sinusoidal-like vibration of engineering structure during VIV, an intelligent monitoring and early warning method for VIV of suspension bridge based on recursive Hilbert transform is proposed. Firstly, the real-time acceleration integral algorithm is used to realize the real-time calculation from the acceleration monitoring data to the dynamic displacement of the stiffening beam, and then the recursive Hilbert transform is used to obtain the real-time analytical signal of the structural displacement during VIV; based on its single-mode near-circular trajectory characteristic, the VIV index and the real-time analysis method are proposed to characterize the development trend of VIV events. This online extraction algorithm can realize the first time warning and the whole process tracking and perception of VIV events. Furthermore, this article also provides a real-time online identification method of key motion parameters such as the instantaneous frequency, phase and amplitude of the structure during VIV, which lays a foundation for real-time monitoring of the whole process of VIV and further evaluation and management decision-making. The accuracy, reliability and engineering feasibility of the proposed method are verified by numerical simulation and VIV monitoring data of a real bridge.

show abstract

Active control of vortex-induced vibration of a circular cylinder by using the oscillatory plate immersed in the cylinder wake at low Reynolds number

Ren

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Xin

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Gu

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2022

Acta Mech. Sin.

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Cause investigation of high-mode vortex-induced vibration in a long-span suspension bridge

Cited by 65 publications

References 23 publications

Monitoring, intelligent perception, and early warning of vortex‐induced vibration of suspension bridge

Monitoring, intelligent perception, and early warning of vortex‐induced vibration of suspension bridge

Monitoring, intelligent perception and early warning of vortex-induced vibration of suspension bridge

Active control of vortex-induced vibration of a circular cylinder by using the oscillatory plate immersed in the cylinder wake at low Reynolds number

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