AM05-03-008 振動状況による生じる非定常空気力差に関する実験的研究(風工学6,一般講演)

概要

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In recent log-span suspension bridge importance of the flutter numerical analysis is increased. It was the Akashi Kaikyo Bridge, to which this analytical approach was installed as a part of wind resistant design procedures with careful verification steps of the flutter analysis. The flutter analysis is consisted of application of the so-called flutter-derivatives/unsteady-aerodynamic-forces and a detailed structural FEM model. In the latter FEM models it is quite usual to introduce motion-dependent nonlinearity, but in the former aerodynamic forces many investigations have been made but there remain many rooms for discussion. In this paper, the motion dependent effect in the unsteady aerodynamic force and pressure distribution around the models are discussed by unsteady pressure distribution measurement of 1:5 and 1:7.5 box bridge decks with fairings in 1DoF vibration of heaving and torsion of steady, decaying and developing transient forced vibrations.
日本流体力学会の論文
2005-09-05