Identification of aerodynamic derivatives of bridge decks at high testing wind speed
Identification of aerodynamic derivatives of bridge decks at high testing wind speed
复制标题
高试验风速下桥面气动导数辨识
DOI：
10.1139/cjce-2017-0010
复制
发表时间：
2018-05
影响因子：
1.4
通讯作者：
Zhiyong Zhou
中科院分区：
文献类型：
--
作者：
Quanshun Ding;Shuanghu Dong;Zhiyong Zhou
提出了一种基于系统双模式和单模式提取的八种气动导数辨识方法，以提高高测试风速下辨识的适用性和准确性。定义了衡量模态对自由振动响应贡献的参与率，并提出了单模态提取方法来提取高风速下系统的模态参数。为了验证所提出方法的可靠性和适用性，识别了具有已知自激力的虚拟部分的空气动力学导数。值得注意的是，在低风速和高风速范围内，识别结果与目标结果之间有很好的一致性，并且该方法在颤振临界状态后效果良好。通过塘沽海河大桥分段风洞试验，识别了桥面在-3°、0°、3°攻角下的气动导数。
An identification of eight aerodynamic derivatives based on dual-mode and single-mode extraction of system is presented to improve the applicability and accuracy of identification at high testing wind speed. The participation rate to measure the contribution of modes on free-vibration responses is defined and the single-mode extraction is presented to extract the modal parameters of the system at high wind speed. To verify the reliability and applicability of the presented method, the aerodynamic derivatives of a dummy section with known self-excited forces are identified. It is noted that there is a very good agreement between the identified results and the target ones in the range of the low and high wind speeds and the presented method works well after the critical state of flutter. The sectional wind tunnel test of the Tanggu-haihe bridge is performed to identify the aerodynamic derivatives of the deck at the attack angles of −3°, 0°, and 3°.
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DOI：
10.1016/j.jweia.2010.09.005
发表时间：
2010-12
影响因子：
4.8
作者：
通讯作者：
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DOI：
10.1061/(asce)0733-9399(2009)135:8(771
发表时间：
2009-08
期刊：
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2003-05
影响因子：
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影响因子：
5.5
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1994-08
期刊：
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影响因子：
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