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桥梁断面气动导数识别的三自由度强迫振动频域法
发表时间:2008-01-31 浏览量:2461 下载量:694
全部作者: | 陈政清,牛华伟 |
作者单位: | 湖南大学风工程试验研究中心 |
摘 要: | 介绍了新开发的完全数控的三自由度强迫振动装置,通过三次单自由度试验和一次耦合振动试验研究了桥梁断面18个气动导数识别的频域方法。通过平板断面的气动导数识别验证了FFT方法和本文提出的CORR算法识别气动导数的有效性,并对流线型箱梁断面的18个气动导数进行了识别。 |
关 键 词: | 桥梁工程;气动导数;强迫振动法;频域法;三自由度 |
Title: | Three degree-of-freedom forced vibration frequency domain method for identification of aerodynamic derivatives of bridge decks |
Author: | CHEN Zhengqing, NIU Huawei |
Organization: | Wind Engineering Research Center of Hunan University |
Abstract: | A completely numeral-controlled 3-DOFs forced vibration device was introduced. The frequency method for identification of 18 aerodynamic derivatives of the bridge deck was studied by three times 1-DOF test and one time 3-DOFs test. The effectiveness of the FFT method and the developed CORR algorithm is investigated by the identification of a thin-plate sectional model. The 18 aerodynamic derivatives of a streamline box girder were also identified. |
Key words: | bridge engineering; aerodynamic derivatives; forced vibration method; frequency domain method; three degrees of freedom |
发表期数: | 2008年5月第2期 |
引用格式: | 陈政清,牛华伟. 桥梁断面气动导数识别的三自由度强迫振动频域法[J]. 中国科技论文在线精品论文,2008,1(2):205-213. |

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