全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

桥梁自激力脉冲响应函数及颤振时域分析

, PP. 103-109

Keywords: 桥梁工程,自激力,理论推导,颤振,脉冲响应函数,状态空间

Full-Text   Cite this paper   Add to My Lib

Abstract:

?为探讨基于自激力脉冲响应函数卷积积分列式的颤振时域分析中存在的问题,使用颤振导数的有理函数近似式推导出了自激力脉冲响应函数的具体形式,建立了基于自激力脉冲响应函数的桥梁颤振运动方程并给出了2种时域求解方案,通过讨论自激力脉冲响应函数的性质解决了颤振时域分析中结构初始响应失真以及积分时间步长如何设定的问题。通过对具有理想平板断面的简支梁的颤振分析发现:结构初始响应失真的现象是自激力中非线性卷积积分项的初始条件未知造成的,通过限定与自激力非定常特性相关的气动系数的下限可以有效解决该问题;时间积分步长会影响到基于自激力递推列式的颤振分析结果的精度,可以根据自激力时域模型中气动力系数及桥梁结构颤振形态估算所需的时步。

References

[1]  SCANLAN R H.Reexamination of Sectional Aerodynamic Force Functions for Bridges[J].Journal of Wind Engineering and Industrial Aerodynamics,2001,89(14/15):1257-1266.
[2]  SALVATORI L,BORRI C.Frequency- and Time-domain Methods for the Numerical Modeling of Full-bridge Aeroelasticity[J].Journal of Computers & Structures,2007,85(11/12/13/14):675-687.
[3]  STAROSSEK U.Complex Notation in Flutter Analysis[J].Journal of Structural Engineering,1998,124(8):975-977.
[4]  CHOWDHURY A G,SARKAR P P.Experimental Identification of Rational Function Coefficients for Time-domain Flutter Analysis[J].Journal of Engineering Structures,2005,27(9):1349-1364.
[5]  张嗣瀛,高立群.现代控制理论[M].北京:清华大学出版社,2006.
[6]  ZHANG Si-ying,GAO Li-qun.Modern Control Theory[M].Beijing:Tsinghua University Press,2006.
[7]  钟万勰.结构动力方程的精细时程积分法[J].大连理工大学学报,1994,34(2):131-136.
[8]  GE Y J,TANAKA H.Aerodynamic Flutter Analysis of Cable-supported Bridges by Multi-mode and Full-mode Approaches[J].Journal of Wind Engineering and Industrial Aerodynamics,2000,86(2/3):123-153.
[9]  HUA X G,CHEN Z Q.Full-order and Multimode Flutter Analysis Using ANSYS[J].Journal of Finite Elements in Analysis and Design,2008,44(9/10):537-551.
[10]  MATSUMOTO M,MATSUMIYA H,FUJIWARA S,et al.New Consideration on Flutter Properties Based on Step-by-step Analysis[J].Journal of Wind Engineering and Industrial Aerodynamics,2010,98(8/9):429-437.
[11]  KAREEM A,WU T.Wind Induced Effects on Bluff Bodies in Turbulent Flows:Nonstationary,Non-gaussian and Nonlinear Features[C]//XIANG H F,GE Y J,CAO S Y.Proceedings of the 7th International Colloquium on Bluff Body Aerodynamics and Its Applications (BBAA7).Beijing:China Communications Audio-visual & Electronic Press,2012:56-79.
[12]  CHEN X Z,KAREEM A.Advances in Modeling of Aerodynamic Forces on Bridge Decks[J].Journal of Engineering Mechanics,2002,128(11):1193-1205.
[13]  CARACOGLIA L,JONES N.A Methodology for the Experimental Extraction of Indicial Functions for Streamlined and Bluff Deck Sections[J].Journal of Wind Engineering and Industrial Aerodynamics,2003,91(5):609-636.
[14]  ZHONG Wan-xie.On Precise Time-integration Method for Structural Dynamics[J].Journal of Dalian University of Technology,1994,34(2):131-136.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133