210 渦励振される弾性支持円柱の外乱相殺制御(FA・制御)(オーガナイズドセッション(a)材料力学・材料強度に関する新展開)

概要

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This paper studies the disturbance cancellation control to suppress a vortex-induced vibration (VIV) of a circular cylinder in a cross flow. We propose an external force model based on the two modes of the vortex pattern of the wake, i.e. Karman vortex street mode and 2P mode. The appearance of the vortex pattern modes depends on the flow rate and the amplitude of the cylinder. The external force to the cylinder is derived from the complex potential of the flow field. The disturbance cancellation control is applied to the cylinder with elastic supports under VIV. The external force is assumed as a harmonic excitation force whose period depends on the flow rate and the amplitude of the cylinder. Numerical simulations are carried out and we confirm that the control method is effective to reduce the vibration amplitude of the cylinder.
一般社団法人日本機械学会の論文
2000-09-25