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標題: 可調式調諧質量阻尼器對機器運轉引致樓板振動之減振研究
A Study on Adjustable Tuned Mass Damper to Reduce Floor Vibration due to Machinery
作者: 張民岦
Chang, Min-Li
關鍵字: Tuned mass damper;調諧質量阻尼器;Floor vibration;Full-Scale experiment;樓板振動;實尺寸試驗
出版社: 土木工程學系所
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This study deals with the optimum design of a tuned mass damper (TMD) for mitigating machine-induced vertical vibration of structures. Theoretically, a TMD without damped tuning of the machine operating frequency provides the optimum control performance. Considering the fact that zero damping is impossible, and since there are many uncertainties in structural modal parameters and machinery excitation frequencies, this study proposes a new field-based design procedure and an adjustable vertically moving TMD (VTMD) to obtain the optimum vibration reduction.
The proposed VTMD is made up of variable mass blocks and changeable commercial springs. A prototype of the VTMD was tested on a simply supported beam (3 m length) to investigate its characteristics in the Large-scale Structure Laboratory of National Chung Hsing University. Both of the Full-Scale building experimental results (one was the Full-scale RC school building floor, and the other was the Full-scale pre-cast RC waffle slab building) confirmed the effectiveness of the VTMD. The result of the floor test indicated a reduction in acceleration of more than 40 %. The result of the waffle slab test showed that a reduction in acceleration of 17-23 % can be achieved even though the mass ratio of VTMD to structure is very small.
The last part of this study, the numerical results from floors equipped with a VTMD in a high-tech fabrication factory in Central Taiwan Science Park, shows that the proposed VTMD can be used as an effective control device to reduce floor vibrations in high-tech fabrication factories.
其他識別: U0005-1708200909290800
Appears in Collections:土木工程學系所

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