防振台に組み込むチューンドダンパーの開発に関する研究

概要

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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 lightweightkeeping the stiffness. However, if the honeycomb vibration isolation table has the experimentalequipment including the vibration resource and the vibration frequency of the resource is identical witha 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 canprevent resonance between vibration isolation table and the vibration resource, will be suggested andevaluated. The effect of TMD is verified by examination of the adoption on 1DOF lumped spring-masssystem. When TMD is installed to vibration isolation tables, the behavior characteristics of the vibrationisolation 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 canprevent the vibration amplitude increase by resonance on the center of the vibration isolation table.
2011-01-31