Study on flutter mechanism and identification of flutter derivatives based on energy equivalence

LIU Lei; GUAN Qinghai; LI Jiawu; LIU Jianxin

doi:10.7638/kqdlxxb-2018.0118

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Study on flutter mechanism and identification of flutter derivatives based on energy equivalence

更新时间：2026-05-28

- Study on flutter mechanism and identification of flutter derivatives based on energy equivalence
- Vol. 38, Issue 2, Pages: 224-231(2020)
- 作者机构：
  
  1. 天津城建大学天津市土木建筑结构防护与加固重点实验室,天津,300384
  2. 长安大学陕西省公路桥梁与隧道重点实验室,西安,710064
  3. 长安大学风洞实验室,西安,710064
- 作者简介：
- 基金信息：
- DOI：10.7638/kqdlxxb-2018.0118
  CLC： TH212;TH213.3
- Published：2020
- 稿件说明：
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刘磊, 管青海, 李加武, 刘健新. 基于能量等效原理的颤振机理及颤振导数识别[J]. 空气动力学学报, 2020, 38(2): 224-231.

LIU Lei, GUAN Qinghai, LI Jiawu, et al. Study on flutter mechanism and identification of flutter derivatives based on energy equivalence[J]. 2020, 38(2): 224-231.
刘磊, 管青海, 李加武, 刘健新. 基于能量等效原理的颤振机理及颤振导数识别[J]. 空气动力学学报, 2020, 38(2): 224-231. DOI： 10.7638/kqdlxxb-2018.0118.

LIU Lei, GUAN Qinghai, LI Jiawu, et al. Study on flutter mechanism and identification of flutter derivatives based on energy equivalence[J]. 2020, 38(2): 224-231. DOI： 10.7638/kqdlxxb-2018.0118.

摘要

桥梁和风是相互作用的流固耦合系统，风对桥梁的作用效应可以分为阻尼效应和刚度效应。首先基于能量等效原理将Scanlan线性颤振自激力分为纯阻尼效应项

、

，纯刚度效应项

、

和既有刚度效应又有阻尼效应的双重效应项

、

。将颤振自激力进行积分运算分别求出其阻尼效应项的做功时程和刚度效应项的无功时程并从功能角度对经典耦合颤振驱动机理进行了研究，最后通过将耦合颤振微分方程转化为功能方程形式，提出了一种基于自激力瞬时做功的颤振导数识别方法并证明了该方法的可靠性。

Abstract

Bridges and winds are fluid-solid interacting coupling systems. The effects of wind on bridge systems can be divided into damping effects and stiffness effects. Firstly

based on the principle of energy equivalence

the Scanlan linear flutter self-excitation is divided into pure damping effect term

、

pure stiffness effect term

、

and double effect term

、

with both stiffness and damping effect. The flutter self-excitation is integrated to calculate the reactive time history of the damping effect term and the stiffness effect term. The classical coupling flutter driving mechanism is studied from the functional point of view. The differential equation is transformed into a functional equation form. Moreover

and a flutter derivative identification method based on self-excited instantaneous work is proposed and the reliability of the method is proved.

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Keywords

references

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