Development of Vibration Damper Using Mutual Collision of Plural Vibrators

研制了一种由悬臂梁及其端部质量组成的多振子减振器，以吸收主系统的机械能，使其相互碰撞。在两个振子的情况下，明确了振子之间的间隙、恢复系数和固有频率对阻尼器性能的影响。结果表明，三个振子阻尼器的减振效果与两个振子相同。通过在x-y平面运动的振子对平面内具有两个方向振动的结构进行了减振试验，结果表明该阻尼器对两个方向的振动也是有效的。

A vibration damper with plural vibrators which consist of a cantilever beam and a mass of its end has been developed to absorb the main system mechanical energy with their mutual collisions. Influence of a gap between the vibrators, the coefficient of restitution and the natural frequency on the damper performance is made clear in the case of two vibrators. It is shown that the effect for a three vibrators damper is same as the two vibrators. Vibration suppress for a structure with two directional vibrations in plane is tried by the vibrators moving in x-y plane and it is demonstrated that the present damper is also effective to the two directional vibrations.