Aerodynamic coupling effects on flutter and buffeting of bridges

被引:194
作者
Chen, XH [1 ]
Matsumoto, M
Kareem, A
机构
[1] Univ Notre Dame, Dept Civil Engn & Geol Sci, NatHaz Modeling Lab, Notre Dame, IN 46556 USA
[2] Kyoto Univ, Dept Global Environm Engn, Kyoto 6068501, Japan
[3] Univ Notre Dame, Dept Civil Engn & Geol Sci, Notre Dame, IN USA
来源
JOURNAL OF ENGINEERING MECHANICS-ASCE | 2000年 / 126卷 / 01期
关键词
D O I
10.1061/(ASCE)0733-9399(2000)126:1(17)
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
The effects of aerodynamic coupling among modes of vibration on the flutter and buffeting response of long-span bridges are investigated. By introducing the unsteady, self-excited aerodynamic forces in terms of rational function approximations, the equations of motion in generalized modal coordinates are transformed into a frequency-independent state-space format. The frequencies, damping ratios, and complex mode shapes at a prescribed wind velocity, and the critical flutter conditions, are identified by solving a complex eigenvalue problem. A significant feature of this approach is that an iterative solution for determining the flutter conditions is not necessary, because the equations of motion are independent of frequency. The energy increase in each flutter motion cycle is examined using the work done by the generalized aerodynamic forces or by the self-excited forces along the bridge axis. Accordingly, their contribution to the aerodynamic damping can be clearly identified. The multimode flutter generation mechanism and the roles of flutter derivatives are investigated. Finally, the coupling effects on the buffeting response due to self-excited forces are also discussed.
引用
收藏
页码:17 / 26
页数:10
相关论文
共 22 条
[1]   AERODYNAMIC FLUTTER ANALYSIS OF SUSPENSION BRIDGES BY A MODAL TECHNIQUE [J].
AGAR, TJA .
ENGINEERING STRUCTURES, 1989, 11 (02) :75-82
[2]  
[Anonymous], P S CABL STAYED SUSP
[3]  
BLEICH F, 1948, P ASCE, V74, P1269
[4]  
Davenport A.G., 1962, J STRUCT ENG, V88, P233, DOI [10.1061/jsdeag.0000773, 10.4319/lo.2013.58.2.0489, DOI 10.4319/1O.2013.58.2.0489]
[5]  
Diana G, 1998, BRIDGE AERODYNAMICS, P131
[6]  
Diana G., 1993, P INT SEM UT LARG BO, P183
[7]   Coupled flutter and buffeting analysis of long-span bridges [J].
Jain, A ;
Jones, NP ;
Scanlan, RH .
JOURNAL OF STRUCTURAL ENGINEERING, 1996, 122 (07) :716-725
[8]   DESIGN FOR ACTIVE FLUTTER SUPPRESSION AND GUST ALLEVIATION USING STATE-SPACE AEROELASTIC MODELING [J].
KARPEL, M .
JOURNAL OF AIRCRAFT, 1982, 19 (03) :221-227
[9]   Multimode coupled flutter and buffeting analysis of the Akashi-Kaikyo bridge [J].
Katsuchi, H ;
Jones, NP ;
Scanlan, RH .
JOURNAL OF STRUCTURAL ENGINEERING-ASCE, 1999, 125 (01) :60-70
[10]   MULTIMODE BRIDGE RESPONSE TO WIND EXCITATIONS [J].
LIN, YK ;
YANG, JN .
JOURNAL OF ENGINEERING MECHANICS-ASCE, 1983, 109 (02) :586-603