一様流中で後縁を支持された柔軟シートの挙動に関する実験および線形安定解析

概要

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Experiments and 2D linear stability analysis of the behavior of flexible thin sheets cantilevered at the trailing edge in a uniform flow are presented. In the experiment, the sheet displacament is measured temporally with a laser displacement sensor. In the stability analysis, the problem is reduced to an eigenvalue problem by representing the sheet flexural vibration equation for the sheet motion by the finite difference method and the flow field by the vortex method. Reasonable agreement is obtained between experimental and analytical results. Flutter occurs at a lower flow speed. As we increase the flow speed, the flutter ceases once and divergence occurs at a higher flow speed. The reduced frequency increases as the mass ratio increases. The first order bending mode is observed for flutter and divergence. The frictional force makes the flutter onset region smaller and the divergence onset region larger.
社団法人日本機械学会の論文
2000-01-25