會議論文
| 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 | en |
| 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 | CHN |
| 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 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/93173 ) |