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A parametric study on reliability-based tuned-mass damper design against bridge flutter

机译:基于可靠性的调谐质量阻尼器设计对桥梁颤动的参数研究

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摘要

We present a probabilistic methodology for designing tuned mass dampers for flutter suppression in long-span bridges. The procedure is computationally efficient and computes the probability of flutter occurrence based on a modified first-order method of reliability analysis, a reduced-order representation of the structure and a time domain formulation of aeroelastic loads. Results of a parametric investigation show that the proposed methodology is preferable to a deterministic design procedure, which relies on nominal values of mechanical and aerodynamic parameters and does not guarantee the maximum safety. Furthermore, the reliability-based approach can be effectively used in the design of multiple tuned mass damper configurations by enhancing robustness against frequency mistuning and by reducing costs associated with supplemental damping for a given safety performance level.
机译:我们提出了一种用于设计调谐质量阻尼器的概率方法,用于在长跨度桥梁中的颤动抑制。 该过程是基于可靠性分析的改进的一阶方法计算的颤动发生的概率,并且结构的降低阶表示和空气弹性载荷的时域制剂的颤动发生的概率。 参数调查结果表明,该方法优于确定性设计程序,依赖于机械和空气动力学参数的标称值,并不能保证最大安全性。 此外,通过增强频率迷雾的鲁棒性以及降低与给定的安全性能水平的补充阻尼相关联的成本,可以有效地使用基于可靠性的质量阻尼器配置的可靠性的方法。

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