E233 高レイノルズ数領域における橋梁非定常空気力係数の振幅依存性

概要

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When measuring unsteady aerodynamic forces by the forced oscillation technique, one pair of amplitudes of forced oscillation for heaving and torsional motions is usually selected on the assumption that there is no amplitude effect on unsteady aerodynamic force coefficients. Therefore, from a wind engineering point of view, in order to correctly evaluate flutter characteristics of long-span bridges, the amplitude effects on the unsteady aerodynamic force coefficients acting on bridge decks must be carefully investigated. This paper gives the results of research on amplitude effects on unsteady aerodynamic force coefficients measured in the high Reynolds number region from 1.4×10^5 to 1.5×10^6 based on the dimension of deck height. A 1 : 10 scale bridge deck section model were used in the NRC 9m×9m wind tunnel. The wind tunnel tests were conducted in uniform smooth flow.
日本流体力学会の論文
2002-07-23