教師資料查詢 | 類別: 會議論文 | 教師: 傅仲麟 FU, CHUNG-LIN (瀏覽個人網頁)

標題:Spectrum Characteristics of Fluctuating Wind Pressures on Hemispherical Domes
學年101
學期1
發表日期2012/12/12
作品名稱Spectrum Characteristics of Fluctuating Wind Pressures on Hemispherical Domes
作品名稱(其他語言)
著者Lo, Yuan-Lung; Fu, Chung-Lin; Cheng, Chii-Ming
作品所屬單位淡江大學土木工程學系
出版者
會議名稱The 2nd Cross-Strait Symposium on Dynamical Systems and Vibration (SDSV 2012)
會議地點Macau, China
摘要A large span roof is one of the common designs for modern structures, such as sport stadiums,
coal/oil storage, museums, or certain symbolic structures standing for religious or national
meanings. The most concerned of such design is its curved geometry and its sensitivity to wind
loads. For the past three decades, many works have been published to investigate the aerodynamic
characteristics on hemispherical domes. However, only limited description was given on discussing
spectrum characteristics. Systematic wind tunnel tests were carried out to investigate the spectrum
characteristics of fluctuating wind pressures on the surface of hemispherical domes due to Reynolds
number effects in both smooth and turbulent wind flows. Reynolds number in this study varies from
6.6×104 to 1.9×106 to have a wider range for discussion. Instantaneous fluctuating wind pressures were measured and processed FFT for spectrum calculation. Power spectra and cross spectra between two pressures along the meridian were selected for examination. It was observed that not only the location but also the distance difference between two pressures can significantly affect the spectrum distribution. From upstream to downstream, power spectra vary gradually as separation occurs and forms a wake region. With the increase of Reynolds number, coherence varies significantly in the lower reduced frequency range. Oncoming turbulence intensities somehow enhance the wave form distribution over all frequency ranges. However, it is also mentioned that a quantitative description may help more in defining how spectrum characteristics affect the wind
loadings on the surfaces.
關鍵字
語言英文
收錄於
會議性質國際
校內研討會地點
研討會時間20121212~20121219
通訊作者Yuan-Lung Lo
國別中國
公開徵稿Y
出版型式電子版
出處Proceedings of The 2nd Cross-Strait Symposium on Dynamical Systems and Vibration
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