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本研究では, 係数励振力 (周期的変動軸力) と周期的変動荷重が作用する系の非線形応答を平均法を用いて解析した. まず, 平均法の精度を既往の解析結果および Runge-Kutta-Gill 法によるシミュレーション解との比較によって確かめる. 次いで, 係数励振力のみを受けるケーブルの応答をサグ比, 係数励振力の振幅および減衰力のパラメータのもとに明らかにする. さらに, 係数励振力と周期的変動荷重を同時に受ける偏平ケーブルの応答特性を検討する.Nonlinear dynamic response of a suspended small-sag cable driven by harmonic axial load and harmonic transverse load is presented. The basic equation of motion is solved by a Galerkin method for space co-ordinate and the averaging method for time co-ordinate. The single-degree-of-freedom approach is employed in this paper. The accuracy of the present solution is discussed at first. Then, nonlinear dynamic responses of a suspended cable are shown for various sag-to-span ratios, damping ratios and amplitudes of harmonic load

NONLINEAR VIBRATION OF A SMALL-SAG CABLE SUBJECTED TO AN AXIAL TIME-VARYING LOAD AND TRANSVERSE TIME-VARYING LOAD