振り子形動吸振器による吊橋の連成フラッタの制御 : 第3報, 全橋三次元モデルによる動吸振器配置法の検討

概要

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In this paper, the effect of a tuned pendulum damper (TPD) for suppression of the coupled flutter of a super-long span suspension bridge was examined by using a three dimensional FEM model. In the previous paper, using a flutter analysis for a 2 D bridge deck model without horizontal motion, a major effect of TPD on the bridge deck flutter is confirmed. However, it is also clarified that the horizontal force induced by TPD motion brings about the horizontal vibration mode of the deck and the TPD actually loses its ability to control flutter. We theoretically derived a suitable arrangement and mass distribution of TPDs which reduces the horizontal forces. As a result of this method, it was confirmed by a 3 D FEM model that the flutter speed for a 2 500 m span suspension bridge was greatly improved by TPDs.
2001-09-25