抄録
The Karman vortex was controlled by minutely vibrating the side plates of a square cylinder, and the suppression of the fluid-dynamic forces acting on the square cylinder was made. Two excitation modes were employed : the identical phase mode in which all the side plates vibrate at the same phase, and the opposite phase mode in which side plates divided at the center of span vibrate with 180 degree differential phase alternately. As a result, the former mode can reduce the averaged drag and the later mode can reduce fluctuating lift.
