355 すき間流れによって発生する連結剛体の空力振動(剛体端部の形状, 支持条件の影響に関する検討)

概要

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We carried out an experiment using a model equipment of connected rigid bodies which form leakage flow channel in order to simulate the aerodynamic oscillation of high speed train that arises in a tunnel section, and examined the relationship between the instability and configurations; support condition of the rigid bodes, shapes of the both edges, initial position in the tunnel and combination amount, with the flow velocity changed. As a result of the experiment, two kinds of the instability phenomenon were observed over the specific flow velocity : minute vibration mainly on the yawing mode and divergence displacement. Especially, the eccentricity of head shape of downstream rigid body and initial position was considered to be the factor of which the effect on the instability was high. And, it was proven that the behavior of the rigid bodies complicatedly changed by the combination of these conditions.
社団法人日本機械学会の論文
2000-09-01