H∞ optimization of fluid viscous dampers for reducing vibrations of high-speed railway bridges
H∞ optimization of fluid viscous dampers for reducing vibrations of high-speed railway bridges
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DOI：
10.1016/j.jsv.2013.12.030
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发表时间：
2014-04
影响因子：
4.7
通讯作者：
M. Luu;M. D. Martínez-Rodrigo;V. Zabel;Carsten Konke
中科院分区：
文献类型：
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作者：
M. Luu;M. D. Martínez-Rodrigo;V. Zabel;Carsten Konke
本文采用代数方法和数值方法对高速铁路桥梁的流体粘滞阻尼器（FVDs）进行了优化设计，以减小结构的共振动力响应。所提出的方法选择的目标函数的基础上的H∞范数在感兴趣的频带。该函数允许考虑结构阻尼特性并同时最小化与多个模式相关的结构响应。特别是，所提出的目标函数也可以扩展到非线性问题，以确定非线性流体粘滞阻尼器的最佳参数，这可能是一个有趣的解决方案，在应用中，高的力水平，预计在阻尼器。最后，通过数值仿真验证了该方法的有效性.仿真结果表明，用该方法得到的最优FVD系数比用已有方法得到的FVD系数更精确。此外，还证明了该方法在求解有高阶模态贡献和考虑非线性FVD问题时的有效性。
This work deals with the optimization of fluid viscous damper systems (FVDs) to reduce the resonant dynamic structural response of high-speed railway bridges by algebraic and numerical approaches. The presented method chooses the objective function based on the H∞ norm over the frequency band of interest. This function allows taking into account structural damping properties and minimizing simultaneously the structural response associated with multiple modes. Especially, the proposed objective function may also be extended to nonlinear problems to determine optimal parameters of nonlinear fluid viscous dampers which may be an interesting solution in applications where high force levels are expected in the dampers. Finally, the proposed method is validated through numerical simulations. The simulation results show that the optimal FVD coefficients obtained by using the presented method are more exact than those by the previous method. Besides, the effectiveness of the method for solving the problems with the contribution of high modes and the consideration of nonlinear FVDs is also proved.