防振台に組み込むチューンドダンパの開発

概要

論文の詳細を見る
Vibration isolation tables have a limitation on installation place because of their large weight. Recently, honeycomb structure is introduced into the vibration isolation table in order to lightweight keeping the stiffness. However, if the honeycomb vibration isolation table has the experimental equipment including the vibration resource and the vibration frequency of the resource is identical with a natural frequency of the isolation table, resonance will be occurred between the resource and the table, and it makes large influence on the measurement accuracy. In this study, an optimized TMD, which can prevent resonance between vibration isolation table and the vibration resource, will be suggested and evaluated. The effect of TMD is verified by examination of the adoption on 1DOF lumped spring-mass system. When TMD is installed to vibration isolation tables, the behavior characteristics of the vibration isolation table are simulated by NASTRAN and the optimal design is carried out for installation place, the size of mass and damping ratio. In the simulation, it is proved that introducing two TMDs can prevent the vibration amplitude increase by resonance on the center of the vibration isolation table.
2010-01-31