Bridge vibration under complex wind field and corresponding measurements: A review

Yu, Enbo; Xu, Guoji; Han, Yan; Peng, Hu; Townsend, Jamie F.; Li, Yongle

doi:10.1016/j.jtte.2021.12.001

Cited by 5 publications

(3 citation statements)

References 168 publications

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“…To guarantee specific accuracy in the study of the frequency spectrum, called ∆ f , the number of samples in the window, L, must be set accordingly (7).…”

Section: Methodology For Identification Of Vibration Modes Of a Wind ...mentioning

confidence: 99%

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Identification of Vibration Modes in Floating Offshore Wind Turbines

Serrano-Antoñanazas,

Sierra-Garcia,

Santos

et al. 2023

JMSE

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Compared to onshore turbines, floating offshore wind turbines (FOWTs) take advantage of the increased availability of offshore wind while causing less environmental impact. However, the strong winds, waves, and currents to which they are subjected trigger oscillations that can cause significant damage to the entire structural system and reduce its useful life. To reduce these loads, active tower damping techniques such as filter banks can be used. These filters must be carefully tuned to block specific vibration frequencies. Therefore, it is essential to analyze the nature of the oscillations in the FOWT and to understand how the frequencies vary in time. This topic is usually approached from a point of view very focused on a specific turbine. What is proposed here is a general method, which can be applied to any type of wind turbine, to automatically study the relationship between vibration frequencies and the degrees of freedom (DOF) of the turbine, which facilitates the design of structural control. Each frequency is associated with the DOF of the FOWT that produces it. This methodology has been successfully validated in simulation experiments with the NREL 5 MW ITI Barge FOWT. Under the wind conditions of the experiments, the main frequency found is 0.605 Hz. This frequency coincides with the 3P theoretical frequency of the FOWT. This proposal may help to design structural control systems able to damp these vibration frequencies with accuracy and efficiency.

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“…To guarantee specific accuracy in the study of the frequency spectrum, called ∆ f , the number of samples in the window, L, must be set accordingly (7).…”

Section: Methodology For Identification Of Vibration Modes Of a Wind ...mentioning

confidence: 99%

“…It is therefore essential to develop control strategies to reduce these potentially damaging oscillations. The effect of the wind in the mechanical structures is not only interesting in the wind energy field, but also has been studied in civil engineering and transport [6,7].…”

Section: Introductionmentioning

confidence: 99%

Identification of Vibration Modes in Floating Offshore Wind Turbines

Serrano-Antoñanazas,

Sierra-Garcia,

Santos

et al. 2023

JMSE

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“…In windy environments, the road vehicles driving on bridge deck are submerged in the aerodynamic flow around the bridge. It is prone to suffer from the vibration of the bridge and crosswinds (Kim et al, 2020; Han et al, 2022; Yu et al, 2022). The overtaking of road vehicles on long-span bridges is a common phenomenon.…”

Section: Introductionmentioning

confidence: 99%

Safety analysis of road vehicles overtake on cables-Stayed bridge under crosswinds

Chen

Wang

et al. 2022

Advances in Structural Engineering

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It is inevitably to encounter overtaking events as vehicles pass through long-span bridges under crosswinds. The effects of the aerodynamic interference on the dynamic responses of the overtaking vehicles should be taken into account in the analysis of the driving safety of vehicles under crosswinds. The time-varying aerodynamic coefficients of the overtaking vehicles are obtained by scale model wind tunnel tests. A vehicle dynamic model is established for the analysis of the dynamic responses of articulated lorry. Based on the coupling vibration framework of the wind-vehicle-bridge system, an improved dynamic analysis system is constructed to solve the transient aerodynamic responses of the overtaking vehicle. It investigates the effects of the overtaking events on the driving safety of vehicles on bridge deck under crosswinds. The results show that the interference aerodynamic forces produced during the overtaking process have significant influences on the dynamic responses of vehicles. The maximum load transfer ratio and side-slip factor of vehicles in consideration of the effects of overtaking event are much greater than the case taking no account of the interference aerodynamic forces. Although the overtaking event do not play a decisive role in the driving safety of vehicles crossing the bridge, it is necessary to consider the combined adverse effects of the overtaking event and crosswinds on the safety of vehicles.

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