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首页> 外文期刊>Journal of Earthquake Engineering >GROUND MOTION DOMINANT FREQUENCY EFFECT ON THE DESIGN OF MULTIPLE TUNED MASS DAMPERS
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GROUND MOTION DOMINANT FREQUENCY EFFECT ON THE DESIGN OF MULTIPLE TUNED MASS DAMPERS

机译：地面运动主导频率对多调谐质量阻尼器设计的影响

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Utilising the Kanai-Tajimi and Clough-Penzien spectrums and the pseudo-excitation algorithm in the frequency domain, parametric study is performed to examine the effect of the dominant frequency of ground motion on the optimum parameters and effectiveness of multiple tuned mass dampers (MTMD) with identical stiffness and damping coefficient but with unequal mass. The examination of the optimum parameters is conducted through the minimisation of the minimum values of the maximum displacement and acceleration dynamic magnification factors of the structure with the MTMD. The optimum parameters of the MTMD include the optimum frequency spacing reflecting the robustness, the average damping ratio and the tuning frequency ratio. Minimisation of the minimum values of the maximum displacement and acceleration dynamic magnification factors, nondimensionalised respectively by the maximum displacement and acceleration dynamic magnification factors of the structure without the MTMD, is used to measure the effectiveness of the MTMD. The results indicate that in the two cases where both the total mass ratio is below 0.02 and the total mass ratio is above 0.02, but the dominant frequency ratio of ground motion is below unity (including unity), the earthquake ground motion can be modelled by a white noise. It is worth noting, however, that for the total mass ratio above 0.02, the Kanai-Tajimi Spectrum or Clough-Penzien spectrum needs to be employed to design the MTMD for seismic structures in situations where the dominant frequency ratio of ground motion is beyond unity.
机译：利用Kanai-Tajimi和Clough-Penzien频谱以及伪激励算法在频域中进行参数研究，以检查地震动的主导频率对多重调谐质量阻尼器（MTMD）的最佳参数和有效性的影响具有相同的刚度和阻尼系数，但质量不相等。通过最小化带有MTMD的结构的最大位移和加速度动态放大系数的最小值来进行最佳参数的检查。 MTMD的最佳参数包括反映鲁棒性的最佳频率间隔，平均阻尼比和调谐频率比。最大位移和加速度动态放大系数的最小值的最小化（分别由没有MTMD的结构的最大位移和加速度动态放大系数来确定）用于测量MTMD的有效性。结果表明，在两种情况下，总质量比均小于0.02和总质量比均大于0.02，但地震动的主频比小于1（包括1），地震地震动可通过以下方式建模：白噪声。但是，值得注意的是，对于总质量比大于0.02的情况，在地面运动的主频比超过1的情况下，需要使用Kanai-Tajimi谱或Clough-Penzien谱来设计地震结构的MTMD。 。

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