Fundamental Experiment for the Flow Induced Vibration of a Tree in Open Channel

Abstract

In order to study the effect of vibration of trees on the flow in river, the characteristics of flow-induced vibration of a circular cylinder and a twig of pine tree elastically mounted in open channel were investigated experimentally. The amplificationof drag force and lift force acting on a cylinder in flow-inducecd vibration and that of a twig of pine tree were evaluated quantitatively. The locking-in phenomenon was also recognized in the flow induced vibration of pine tree.