428 容器壁の動特性が粒状体ダンパの制振性能に与える影響について

概要

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"Particle damper" is well known as a technique for add damping to a vibrating structure by filling it with many particles. One of the biggest advantages of this technique is that a damping effect can be achieved over a broad frequency range by the damper. Moreover, the damping effect is not dependent on temperature unlike many visco-elastic damping materials. However, it is also well known that the effect depends on a vibration amplitude. If a direction of vibration is vertical, and the acceleration of vibration is less than 1G, the particle damper has little damping effect. The purpose of this report is to propose a new damper which gives a high damping effect even though the acceleration is less than 1G. The bottom of the proposed damper is made of a leaf spring and it accelerate the vibration acceleration of particles to generate the damping effect. Results of a experiment proved that the proposed damper gives a high damping effect even though the acceleration of vibration is less than 1G.
2011-09-05