Analytical Study on Bending Effects in a Stay Cable with a Damper |
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| Authors: | Nam Hoang Yozo Fujino |
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| Affiliation: | 1Lecturer, Faculty of Civil Engineering, Ho Chi Minh City Univ. of Technology, Ho Chi Minh City, Vietnam; formerly, Postdoctoral Research Fellow, The Univ. of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan (corresponding author). E-mail: nam@bridge.t.u-tokyo.ac.jp
2Professor, Dept. of Civil Engineering, The Univ. of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
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| Abstract: | The effects of bending on the modal properties of a stay cable with a transverse damper are analytically studied. Considering that the value of the flexural rigidity in the stay cable is small in practice, an explicit asymptotic formula for the modal damping of a cable with a general type of damper is derived. For a viscous damper, the asymptotic formula obtained is compact, accurate, and thus is very suitable for practical design. Furthermore, for the first few vibration modes of interest, the asymptotic solution is independent of the modal index. It is shown that flexure in the cable reduces the maximum attainable modal damping, possibly up to 20%, while it significantly increases the optimal damping coefficient of the damper. |
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| Keywords: | Damping Vibration Cables Flexure |
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