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Applied Mathematics and Mechanics (English Edition) ›› 2009, Vol. 30 ›› Issue (3): 335-341.doi: https://doi.org/10.1007/s10483-009-0307-x

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Parametric studies on relationships between flutter derivatives of slender bridge (II)

徐旭   

  1. Department of Civil Engineering, Shanghai University, Shanghai 200072, P. R. China
  • 收稿日期:2008-12-08 修回日期:2009-01-22 出版日期:2009-03-05 发布日期:2009-03-01
  • 通讯作者: Xu XU, Associate Professor, Ph. D., E-mail: xxu@mail.shu.edu.cn E-mail:xxu@mail.shu.edu.cn

Parametric studies on relationships between flutter derivatives of slender bridge (II)

Xu XU   

  1. Department of Civil Engineering, Shanghai University, Shanghai 200072, P. R. China
  • Received:2008-12-08 Revised:2009-01-22 Online:2009-03-05 Published:2009-03-01
  • Contact: Xu XU, Associate Professor, Ph. D., E-mail: xxu@mail.shu.edu.cn E-mail:xxu@mail.shu.edu.cn

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摘要： Based on curve fitting of coefficients of three component forces of the Messina Straits Bridge, and the previously proposed semi-analytical expressions of flutter derivatives of flexible structure, the change of flutter derivatives of slender bridge cross-section with respect to its aerodynamic center, rotational speed and angle variation is studied using a parametric method. The calculated results are compared with the measured ones, and expressions of flutter derivatives of the Messina Straits Bridge are derived. The intrinsic relationships existing in flutter derivatives are validated again. It is shown that the influence of the rotational speed on flutter derivatives is not negligible. Therefore, it provides an additional semi-analytical approach for analyzing flutter derivatives of the bridge with streamlined cross-section to get its aerodynamic information.

关键词: flutter derivative, slender bridge, parametric analysis

Abstract: Based on curve fitting of coefficients of three component forces of the Messina Straits Bridge, and the previously proposed semi-analytical expressions of flutter derivatives of flexible structure, the change of flutter derivatives of slender bridge cross-section with respect to its aerodynamic center, rotational speed and angle variation is studied using a parametric method. The calculated results are compared with the measured ones, and expressions of flutter derivatives of the Messina Straits Bridge are derived. The intrinsic relationships existing in flutter derivatives are validated again. It is shown that the influence of the rotational speed on flutter derivatives is not negligible. Therefore, it provides an additional semi-analytical approach for analyzing flutter derivatives of the bridge with streamlined cross-section to get its aerodynamic information.

Key words: flutter derivative, slender bridge, parametric analysis

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