2つの近接した固有振動数をもつ構造系のギャロッピングに及ぼす乱れの影響
1988 年 1988 巻 398 号 p. 193-196
詳細
1988 年 1988 巻 398 号 p. 193-196
Effect of turbulent wind on modal interaction in galloping of structure with two closely-spaced natural frequencies is studied. Numerical simulation indicates that the presence of certain intensity of turbulence causes the modal interaction, i. e. the dominant vibration mode alternately changes from one mode to the other in time domain. The modal responses seemingly are the combination of galloping response with time-varying amplitude and the random buffeting responses. This is also confirmed by wind tunnel observations.
