Mechanism and Parameter Design for Vibration Suppression Using Mode Localization

2016 Fiscal Year Final Research Report

• Project/Area Number: 26420168
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Dynamics/Control
• Research Institution: Kyushu University
• Principal Investigator: Mori Hiroki 九州大学, 工学研究院, 准教授 (50451737)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 制振 / 局在化 / ダンパ

Outline of Final Research Achievements

The presence of irregularity in a periodic structure results in the vibration localization which exhibits locally large amplitude. The combination of the vibration localization and a viscous damper can be one way to improve damping performance by intentionally creating a vibration mode which is strongly localized at the damper position. This study investigates the behavior of free and forced vibration of a uniform tensioned string which is coupled to ground through homogeneously distributed stiffness and to a viscous damper, examining the effect of vibration localization on the damping performance. Damping characteristics are evaluated by analyses of two types of the analytical models as well as by experiment. The results show that the added concentrated mass induces vibration mode which is strongly localized at the damper position, demonstrating improvement in damping performance.

Free Research Field

機械力学，機械振動学