| 由动态阻尼特性判断结构颤振的临界风速 |
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| 引用本文： | 曹志远,徐旭.由动态阻尼特性判断结构颤振的临界风速[J].上海大学学报(自然科学版),2001,7(2):165-169. |
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| 作者姓名： | 曹志远 徐旭 |
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| 作者单位： | 1. 同济大学工程力学与技术系,
2. 上海大学校长办公室, |
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| 摘 要： | 将航空理论中的飞机机翼颤振的分析方法U-g法引入到桥梁颤振的研究中，从而可以由结构的动态阻尼特性，即由g随来流风速U或由对数衰减率dk随折减速度的变化曲线，来判断桥梁发生颤振的临界风速，并就具体的算例进行了研究，良好的结果验证了该方法在土木工程中的适用性。
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| 关 键 词： | 临界风速 动态阻尼 桥梁 结构颤振 结构风工程理论 扭转颤振 |
| 文章编号： | 1007-2861(2001)02-0165-05 |
| 修稿时间： | 2000年8月20日 |
Determining Critical Velocity of Structure Flutter with Characteristics of Dynamical Damping |
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| CAO Zhi-yuan,XU Xu.Determining Critical Velocity of Structure Flutter with Characteristics of Dynamical Damping[J].Journal of Shanghai University(Natural Science),2001,7(2):165-169. |
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| Authors: | CAO Zhi-yuan XU Xu |
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| Institution: | CAO Zhi-yuan 1,XU Xu 2 |
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| Abstract: | Various analyzing methods of bridge flutter are summarized, and the U-g method used in the analysis of airplane wings flutter in aviation theory is introduced into the researches of bridge flutter. The critical velocity of bridge when it begins to flutter can be determined with characteristics of structure dynamical damping, i.e. diagrams of g versus income wind velocity U, or logarithm decline rate versus reduced velocity. The critical velocity of two bridges are studied, the results validate the applicability of the method in civil engineering. |
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| Keywords: | flutter critical velocity dynamical damping |
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