建築物機械設備降噪隔振與抗震整合設計法暨效能測試研究

Integrated Design and Validation Method of Attenuating Structure-Borne Noise and Vibration and Anti-Earthquake for Mechanical Equipments in Buildings

盧威宇(Wei-Yu Lu) ； 王偉輝(Wei-Hui Wang)

《中華民國振動與噪音工程學會論文集》 2008 (2008/05) Pp. 308-319

https://doi.org/10.30028/CSSVANNUAL.200805.0308

摘要

在建築物中所設置的機械設備，如電梯、空調壓縮機及冷凍機、空調管路、變壓器等，一方面要能承受地震負荷而不致影響其運轉功能，一方面又需隔振以降低機械設備引起之結構傳音，由於規範要求之抗震墊勁度遠高於隔振降噪所需之彈性墊勁度，故抗震墊及隔振墊之選擇在建築之設計中，常以抗震優先，以致隔振降噪之效果不彰，機械振動引起之結構低頻噪音遂成為一項極待克服之問題。本文利用二段式隔振器來兼顧抗震與機械產生之結構音隔振，並探討二段式隔振器其動態勁度與阻尼比量測設計方法，並佐以測試驗證其效果，由實際應用案例顯示，兼俱抗震之隔振裝置，其隔振效果可達10~12分貝。

關鍵字

抗震 ； 隔振 ； 結構音

並列摘要

A number of mechanical equipments such as elevators, compressors ventilators, vents and pipes, transformers etc., are usually installed in a building; consequently, it needs to attenuate the structure-borne noise generated by the equipments, on the other hand, to be capable of sustaining seismic load. Owing to the difference existing in the peak frequencies of mechanical vibration of the equipments and the seismic load, the required stiffness of the isolators for both vibration sources is quit different. It can be a problem to design such isolator to satisfy these two purposes simultaneously. While in this paper, a two-stage isolator is is used to satisfy these two purposes. The design consideration regarding to the dynamical stiffness and damping ratio are discussed. From the validation measurement of an application example, it shows that effectiveness in noise reduction of an amount 10~12 dB can be attained.

並列關鍵字

Seismic restraint ； Vibration isolated ； Structure- borne noise