Systems of hysteretic tuned mass dampers are proposed for multi-mode flutter mitigation in long-span suspension bridges. The performance of the nonlinear absorbers is systematically compared with that of classical damped (linearly viscoelastic) absorbers. The equations of motion ensuing from a linearized parametric structural model of a suspension bridge are coupled with the equations governing the dynamics of the passive nonlinear control system and the time-dependent aerodynamic loads obtained through a quasi-steady nonlinear formulation and the unsteady indicial theory. The equations of the controlled aeroelastic system are reduced employing the Faedo-Galerkin method. Numerical simulations are performed to investigate the effectiveness of the vibration absorbers system comparing both the onset of flutter and the post-flutter behavior without the control devices with the corresponding responses obtained when multiple absorbers are installed. © 2014 Elsevier Ltd.

Casalotti, A., Arena, A., Lacarbonara, W. (2014). Mitigation of post-flutter oscillations in suspension bridges by hysteretic tuned mass dampers. ENGINEERING STRUCTURES, 69, 62-71 [10.1016/j.engstruct.2014.03.001].

Mitigation of post-flutter oscillations in suspension bridges by hysteretic tuned mass dampers

Casalotti A.;Lacarbonara W.
2014-01-01

Abstract

Systems of hysteretic tuned mass dampers are proposed for multi-mode flutter mitigation in long-span suspension bridges. The performance of the nonlinear absorbers is systematically compared with that of classical damped (linearly viscoelastic) absorbers. The equations of motion ensuing from a linearized parametric structural model of a suspension bridge are coupled with the equations governing the dynamics of the passive nonlinear control system and the time-dependent aerodynamic loads obtained through a quasi-steady nonlinear formulation and the unsteady indicial theory. The equations of the controlled aeroelastic system are reduced employing the Faedo-Galerkin method. Numerical simulations are performed to investigate the effectiveness of the vibration absorbers system comparing both the onset of flutter and the post-flutter behavior without the control devices with the corresponding responses obtained when multiple absorbers are installed. © 2014 Elsevier Ltd.
2014
Casalotti, A., Arena, A., Lacarbonara, W. (2014). Mitigation of post-flutter oscillations in suspension bridges by hysteretic tuned mass dampers. ENGINEERING STRUCTURES, 69, 62-71 [10.1016/j.engstruct.2014.03.001].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/438269
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