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首页> 外文期刊>Earthquake Engineering & Structural Dynamics >Multiple active-passive tuned mass dampers for structures under the ground acceleration
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Multiple active-passive tuned mass dampers for structures under the ground acceleration

机译：地面加速度作用下的结构的多个主动-被动调谐质量阻尼器

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摘要

Multiple active-passive tuned mass dampers (MAPTMD) consisting of many active-passive tuned mass dampers (APTMDs) with a uniform distribution of natural frequencies have been, for the first time here, proposed for attenuating undesirable oscillations of structures under the ground acceleration. The MAPTMD is manufactured by keeping the stiffness and damping coefficient constant and varying the mass. The control forces in the MAPTMD are generated through keeping the identical displacement and velocity feedback gain and varying the acceleration feedback gain. The structure is represented by the mode-generalized system corresponding to the specific vibration mode that needs to be controlled. Through minimization of the minimum values of the maximum dynamic magnification factors (DMF) of the structure with the MAPTMD (i.e. through implementation of Min.Min.Max.DMF), the optimum parameters of the MAPTMD are investigated to delineate the influence of the important parameters such as mass ratio, total number, normalized acceleration feedback gain coefficient and system parameter ratio on the effectiveness (i.e. Min.Min.Max.DMF) and robustness of the MAPTMD. The optimum parameters of the MAPTMD include the optimum frequency spacing, average damping ratio and tuning frequency ratio. Additionally, for the sake of comparison, the results for a single APTMD are also taken into account in the present paper. It is demonstrated that the proposed MAPTMD can be employed to significantly reduce the oscillations of structures under the ground acceleration. Also, it is shown that the MAPTMD can render high robustness and has better effectiveness than a single APTMD. In particularly, if and when requiring a large active control force, MAPTMD is more promising for practical implementations on seismically excited structures with respect to a single APTMD.
机译：在此，首次提出了由固有频率均匀分布的许多主动-被动调谐质量阻尼器（APTMD）组成的多个主动-被动调谐质量阻尼器（MAPTMD），用于衰减地面加速度下结构的不良振动。通过保持刚度和阻尼系数恒定并改变质量来制造MAPTMD。通过保持相同的位移和速度反馈增益并改变加速度反馈增益，可以在MAPTMD中产生控制力。该结构由对应于需要控制的特定振动模式的模式通用系统表示。通过使用MAPTMD最小化结构的最大动态放大系数（DMF）的最小值（即通过实施Min.Min.Max.DMF），研究了MAPTMD的最佳参数，以描述重要因素的影响。诸如质量比，总数，归一化加速度反馈增益系数和系统参数比率等参数对MAPTMD的有效性（即Min.Min.Max.DMF）和鲁棒性的影响。 MAPTMD的最佳参数包括最佳频率间隔，平均阻尼比和调谐频率比。另外，为便于比较，本文还考虑了单个APTMD的结果。结果表明，所提出的MAPTMD可以用来显着降低地面加速度下结构的振动。而且，显示出与单个APTMD相比，MAPTMD可以提供高鲁棒性并且具有更好的有效性。特别地，如果并且当需要大的主动控制力时，相对于单个APTMD，对于在地震激励结构上的实际实现，MAPTMD更有希望。

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