多関節平板の関節数による振動特性の変化

抄録

Multi-articulated flat plate was proposed to use the flow-induced oscillation as energy resources. It flutters in a uniform flow periodically, but it is still unknown why it is flutters. It was hypothesized that the fluttering motion of Multi-articulated flat plate was caused by the waving motion generated in the flow. In order to prove it, it would be verified that the frequency, the fluttering mode, and the amplitude distribution of the Multi-articulated flat plate would not vary with the number of joint of it. The frequency and the fluttering mode were measured on the fluttering Multi-articulated flat plates of 3, 4, 5, 6, 7, 8, 11 and 22 axes by the wind tunnel experiments. The fluttering frequency was obtained form the displacement by its fluttering motion. Continuous photos were shot by the digital camera, and the amplitude distribution was obtained by image processing. From the results, although the amplitude distributions were different, the fluttering frequency and fluttering mode of Multi-articulated flat plate was almost same.