原文传递
System Decoupling Approach for 3-DOF Bridge Flutter Analysis
| 题名： | System Decoupling Approach for 3-DOF Bridge Flutter Analysis |
| 其他题名： | Bartoli,G.,and Mannini,C.(2008)."A simplified approach to bridge deck flutter."J.Wind Eng.Ind.Aerodyn.,96(2),229–256. |
| 正文语种： | 英文 |
| 作者： | F. Y. Xu |
| 关键词： | Bridge;Flutter analysis;System decoupling approach;Flutter derivatives;Parametric analysis;Wind effects |
| 摘要： | A novel system decoupling approach (SDA) that enables three degree-of-freedom (3-DOF) bridge flutter analysis is proposed in this study to simultaneously investigate the relationships between modal parameters and 18 flutter derivatives. Based on the incentivefeedback mechanisms, the aerodynamic coupled system is conveniently decoupled in an iterative solution. Based on the SDA, it is unnecessary to simultaneously calculate all multiple frequencies for determining modal parameters and eventually quantifying critical flutter wind velocity. The efficacy and accuracy of the SDA is verified using a numerical example of thin flat plate. The coupling effects among three DOFs and influence of 18 flutter derivatives on flutter performance are quantified using the newly proposed method. The flutter mechanisms of thin flat plate and bluff deck section of the Akashi Kaikyo Suspension Bridge are numerically examined, and both difference and common grounds for two typical flutter phenomena are summarized. The results by the SDA show good agreement with those by the commonly used complex eigen-value analysis (CEVA). For the Akashi Kaikyo Bridge with bluff deck section, the analytical results of 2-DOF coupled flutter are coincident with the 3-DOF case and the experimental observations. This study provides significant insights into the flutter characteristics of 3-DOF bridges and explores the roles played by various parameters in modifying bridge deck aerodynamics and the evolution of modal coupling with increasing wind velocity. The simplified formulation that only concerns A1*; A2*; A3*;H3* is presented, by which acceptable accuracy of flutter parameters can also be achieved for torsional modal branch. It is validated using a thin flat plate and the Akashi Kaikyo Bridge with bluff deck. |
| 出版年： | 2015 |
| 论文唯一标识： | P-26Y2015V141N07004 |
| 英文栏目名称： | Technical Papers |
| doi： | 10.1061/(ASCE)ST.1943-541X.0001129 |
| 期刊名称： | Journal of Structural Engineering |
| 拼音刊名(出版物代码)： | P-26 |
| 卷： | 141 |
| 期： | 07 |
| 页码： | 18-29 |
相关文献
- Galloping Mechanism of a Closely Tuned 3-DOF System Considering Aerodynamic Stiffness
- Galloping Stability Criterion for a 3-DOF System Considering Aerodynamic Stiffness and Inertial Coupling
- Galloping Stability Criterion for 3-DOF Coupled Motion of an Ice-Accreted Conductor
- Fatigue Reliability Assessment of Railway Bridges Based on Probabilistic Dynamic Analysis of a Coupled Train-Bridge System
- Aerodynamic and Aerostatic Performance of a Long-Span Bridge with Wide Single Box Girder Installed with Vertical and Horizontal Stabilizers
- Investigation into Relationship between Intensive Land Use and Urban Heat Island Effect in Shijiazhuang City Based on the Tapio Decoupling Theory
检索历史
应用推荐
