Optimal Tuning of Amplitude Proportional Coulomb Friction Damper for Maximum Cable Damping

Weber, Felix; Høgsberg, Jan Becker; Krenk, Steen

doi:10.1061/(asce)0733-9445(2010)136:2(123)

Cited by 54 publications

(34 citation statements)

References 26 publications

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“…The discussion earlier shows that a predominant and uncontrolled friction damper on a cable yields strong amplitude dependent cable damping as long as the damper works and does not provide any damping to the cable when the constant friction force locks the cable at amplitudes below a certain threshold. This observation is in agreement with the numerical analysis of a taut string with uncontrolled friction damper as shown in and the experimental results shown in . It is therefore concluded that the predominant friction force must be controlled depending on the actual vibration state of the cable as shown in where a controllable friction damper was used.…”

Section: Magnetorheological Damper In Passive Modesupporting

confidence: 92%

Amplitude and frequency independent cable damping of Sutong Bridge and Russky Bridge by magnetorheological dampers

Weber

Distl

2014

Struct. Control Health Monit.

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SUMMARY Two control approaches for magnetorheological (MR) dampers on cables based on collocated control without state estimation are formulated, which generate amplitude and frequency independent cable damping: cycle energy control and controlled viscous damping (CVD). The force tracking is solved by the inverted Bingham model whose parameters are fitted as function of current and frequency. Cycle energy control and CVD are experimentally validated by hybrid simulations and free decay tests on stay cables of the Sutong Bridge, China, and the Eiland Bridge, the Netherlands. The implementation of CVD on the Russky Bridge, Russia, includes two novelties: the force tracking also takes the actual MR damper temperature into account to ensure precise force tracking for MR damper temperatures −40 to +60 °C and the decentralised real‐time control units with pulse width current modulation are installed next to each MR damper to avoid long direct current (DC) power lines with associated losses and thereby minimise power consumption. Copyright © 2014 John Wiley & Sons, Ltd.

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Section: Magnetorheological Damper In Passive Modesupporting

confidence: 92%

Amplitude and frequency independent cable damping of Sutong Bridge and Russky Bridge by magnetorheological dampers

Weber

Distl

2014

Struct. Control Health Monit.

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“…Installing external dampers or actuators has been shown to be one of the most effective way to enhance cable damping and, therefore, to mitigate different kinds of cable vibrations, such as rain/wind-induced vibration, vortex-induced vibration, buffeting, and wake galloping. Numerous models and analysis methods for simulation of cable vibration have been reported [3][4][5][6] and used to study various types of passive dampers, including viscous dampers, [4,[7][8][9][10][11][12][13][14][15] nonlinear dampers, [16,17] and tuned mass dampers. [18,19] These results showed that, after careful tuning, viscous and tuned mass dampers could provide optimal additional damping to a specified mode of a cable, and passive friction dampers could provide optimal additional damping to a specified vibration amplitude.…”

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Inertial mass damper for mitigating cable vibration

Duan

Spencer

et al. 2017

Struct. Control Health Monit.

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Summary Stay cables used in cable‐stayed bridges are prone to vibration due to their low‐inherent damping characteristics. Many methods have been implemented in practice to mitigate such vibration. Recently, negative stiffness dampers have gained attention because of their promising energy dissipation ability. The viscous inertial mass damper (VIMD) has been shown to have properties similar to negative stiffness dampers. This paper examines the potential of the VIMD to enhance the damping, and mitigate the vibration, of stay cables. First, a control‐oriented model of the cable is employed to formulate a system level model of the cable–VIMD system for small in‐plane motion. After carefully classifying and labeling the mode order, the modal characteristics of the system are analyzed, and the optimal damper parameters for the several lower frequency modes are determined numerically. The results show that the achievable modal damping ratio can be up to nearly an order of magnitude larger than that of the traditional linear viscous damper; note that the optimal parameters of the VIMD are distinct for each mode of interest. These results are further validated through analysis of the cable responses due to the distributed sinusoidal excitation. Finally, a case study is conducted for a cable with a length of 307 m, including the design of practical damper parameters, modal‐damping enhancement, and vibration mitigation under wind loads. The results show that the VIMD is a promising practical passive damper that possesses greater energy dissipation capacity than the traditional viscous damper for such cable–damper systems.

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“…Duan et al (2005), Christenson et al (2006), Li et al (2007), Wu and Cai (2010), Weber et al (2010) studied cable vibration mitigation by controllable Magnetorheological (MR) or friction type dampers. Main and Jones (2002b) discussed the influence of damper nonlinearity.…”

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Damping of Full-Scale Stay Cable with Viscous Damper: Experiment and Analysis

Zhou

Sun

Xing

2014

Advances in Structural Engineering

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A full-scale cable vibration mitigation experiment was conducted by means of a 215.58-meters-long stay cable attached with a pair of viscous dampers. Test results showed that the damping of the cable was greatly increased after the installation of viscous dampers. It was found that the obtained damping of the cable with viscous dampers depended on the amplitude, and the maximum damping was smaller than the maximum attainable damping. The viscous damper showed nonlinear behaviors regarding the mechanical performances, as well as the interior stiffness. Therefore, the effect of the interior stiffness of a damper on the cable damping was also studied by using an analytical formulation of the complex eigenvalue problem. An engineering approximation concerning the damping of a taut cable with a viscous damper was proposed, where the influence of the interior stiffness was taken into account. The analytical approximate formulations were further extended to nonlinear viscous damper based on the assumption of equivalent energy dissipation in one period. It turned out that the analytical results considering effects of interior stiffness and nonlinearity were in a good agreement with the measured damping. Both the test and analytical results confirmed that damper interior stiffness would greatly reduce the maximum attainable damping, and damping would be amplitude-dependent for cable with a nonlinear viscous damper.

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Optimal Tuning of Amplitude Proportional Coulomb Friction Damper for Maximum Cable Damping

Cited by 54 publications

References 26 publications

Amplitude and frequency independent cable damping of Sutong Bridge and Russky Bridge by magnetorheological dampers

Amplitude and frequency independent cable damping of Sutong Bridge and Russky Bridge by magnetorheological dampers

Inertial mass damper for mitigating cable vibration

Damping of Full-Scale Stay Cable with Viscous Damper: Experiment and Analysis

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