Mitigation of post-flutter oscillations in suspension bridges by hysteretic tuned mass dampers
Mitigation of post-flutter oscillations in suspension bridges by hysteretic tuned mass dampers
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DOI：
10.1016/j.engstruct.2014.03.001
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发表时间：
2014-06
影响因子：
5.5
通讯作者：
A. Casalotti;A. Arena;W. Lacarbonara
中科院分区：
文献类型：
--
作者：
A. Casalotti;A. Arena;W. Lacarbonara
提出了迟滞调谐质量阻尼器系统，用于减轻大跨度悬索桥的多模式颤振。非线性吸波器的性能与经典阻尼（线性粘弹性）吸波器的性能进行了系统比较。由悬索桥的线性化参数结构模型得出的运动方程与控制被动非线性控制系统动力学的方程以及通过准稳态非线性公式和非稳态指标理论获得的瞬态空气动力载荷耦合。采用 Faedo-Galerkin 方法简化了受控气动弹性系统的方程。通过数值模拟来研究减振器系统的有效性，比较没有控制装置的颤振开始和颤振后行为以及安装多个减振器时获得的相应响应。
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.