OSCILLATION CONTROL DEVICE

摘要

PURPOSE: A vibration control device is provided to prevent deformation and break of materials by preventing that a natural vibration frequency and an excitation vibration frequency become same. CONSTITUTION: A vibration control device comprises a fluid storage tank(20), a fluid injection unit, and a fluid discharge unit. The fluid storage tank is arranged in one side of a funnel part of a ship. The fluid injection unit and the fluid discharge unit are connected to the fluid storage tank and control the vibration frequency of the funnel part through the amount of fluid injected to or discharged from the fluid storage tank. The fluid injection unit and the fluid discharge unit are comprised by a pump or a valve.