應用非線性元件於高架地板之創新設計隔振器研究

The Study of a Creative Design Vibration Isolator for Elevated Floors by Applying a Nonlinear Component

王信富(Hsin-Fu Wang)

指導教授 ： 黎文龍

國立臺北科技大學/機電學院/機電整合研究所/碩士(2008年)

https://doi.org/10.6841/NTUT.2008.00212

摘要

高架地板廣泛的使用在高科技設備中，作者發現：藉由調整結構勁度也能同時擁有隔振的可能性。ㄧ般來說，在高架地板的設計中，人們大都只會考慮高架地板支柱的剛性，很少考慮其隔振的問題。本研究中，我們利用碟型彈簧相同的原理，創新設計一個非線性元件，利用調節勁度而有隔振器的效果，且此隔振器屬於被動式隔振器的ㄧ種。隔振器中加了非線性元件，解決了一般被動式隔振缺乏調整彈性的問題，其基本原理在於利用調整勁度去改變隔振系統的自然頻率，使其向低頻偏移，而達到更好的隔振效果。在本研究中，分析與實驗的結果非常相符，此外在預壓17㎜情況下，甚至可得到傳輸比0.076非常好的隔振效果，由此數據顯示本研究利用創新的非線性元件於地板支柱上有很好的隔振效果。最後我們得到一個結論：用非線元件結合高架地板之設計，確實可以達到很好了的隔振效果，如果進ㄧ步將此非線性元件定義成一系列的規格產品，經系統化的歸納整理後，將可被工業界所使用，創造更高的附加價值。

關鍵字

高架地板 ； 被動式隔振器 ； 非線性元件

並列摘要

By reviewing the Elevated Floors (EF) currently used for technical facilities, the author found the possibility of including isolation functions to EF in addition to the structural stiffness. Generally speaking, one normally considers the stiffness of EF during the design, and seldom considers vibration isolation. In this report, a nonlinear component has been creatively integrated to the structural stiffness, and thus it becomes an isolator. In fact, this isolator can be classified as a passive one. However, by adding it to the EF, one overcomes the main shortcoming of a passive isolator which is less adaptively to the environments. This is done by adjusting stiffness to change its natural frequency, which in turn is to pre-stress the nonlinear component. By pre-compressing the nonlinear element, the first natural frequency can thus be moved to the lower side. As a consequence, the effect of EF isolation can be more profound. The report shows a very good agreement while comparing the experimental result to that of the FEA (Finite Element Analysis). Moreover, the present model can achieve the transmissibility of 0.076 from the experimental results when it is fully pre-compressed. As a conclusion, the present study has verified that the possibility of including an isolator to the EF currently use. However, a more systematic study is required in case of applying it to the industries.

並列關鍵字

Elevated Floors ； Passive isolator ； Non-linear components

參考文獻

[42] 蔡忠瑾，“應用非線性元件模組之創新微振避振平台研發”，國立台北科技大學　機電整合研究所碩士論文

[43] 陳信宏，“頻率可調式非線性微吸振器之研究”，國立台北科技大學製造科技研究所，2003。

[1] Eugene I. Rivin, “Passive Vibration Isolation,” Amer. Soc. of Mech. Eng., 2003.

[3] G. Curti and R. Montanini, “On the Influence of Friction in the Calculation of Conical Disk Springs,” Transaction of the ASME, vol. 121, pp. 622-627, 1999.

[6] G. Curti and F. A. Raffa, “Material Nonlinearity Effects in the Stress Analysis of Conical Disk Spring,” Transaction of the ASME, vol. 114, pp. 238-244, 1992.