带弹性支承的颗粒—钢球碰撞阻尼的实验研究

杜妍辰 刘喆 李海超

振动与冲击 ›› 2013, Vol. 32 ›› Issue (24) : 56-60.

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振动与冲击 ›› 2013, Vol. 32 ›› Issue (24) : 56-60.
论文

带弹性支承的颗粒—钢球碰撞阻尼的实验研究

  • 杜妍辰1 刘喆1 李海超2

作者信息 +

Experimental Study on the Particle - Ball Impact Damper with Elastic Support

  • DU Yanchen1 LIU Zhe1 LI Haichao2

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文章历史 +

摘要

为提高碰撞阻尼器的减振性能,提出一种带弹性支承的颗粒碰撞阻尼器,这种新型碰撞阻尼器将弹性碰撞的动量交换机制或塑性碰撞的耗能机制有机地结合在一起。在一根悬臂梁上分别对无阻尼、碰撞阻尼、颗粒阻尼、带弹性支承的碰撞阻尼和带弹性支承的颗粒碰撞阻尼5种情况的减振效果进行了实验研究。实验结果表明:(1)在所有被测试阻尼器中,带弹性支承的颗粒碰撞阻尼器不仅拥有更高的振幅衰减率,而且表现出对不同频率的稳定性;(2) 正是由于弹簧和颗粒塑性变形的双重作用,使得本文提出的带弹性支承的颗粒碰撞阻尼器取得了传统的碰撞阻尼器无法实现的优异减振效果;(3) 对于带弹性支承的颗粒碰撞阻尼器来说,存在一个最佳支承刚度。

Abstract

In order to improve the damping performance of the impact damper, the particle impact damper with elastic support is presented. This new kind of impact damper combines the momentum exchange in elastic impact and energy dissipation in plastic impact together. Experimental studies on the damping performance are carried out on a cantilever beam in the following 5 cases : no damper, impact damper, particle damper, impact damper with elastic support and particle impact damper with elastic support. The experimental results show that (1) in all test dampers, the particle impact damper with elastic support not only possesses the highest attenuation ratio, but also exhibits stability for different frequencies; (2) it is the combination of spring and the plastic deformation of particles that makes the particle impact damper with elastic support exhibit better performance which cannot be achieved by traditional impact dampers; (3) there exists an optimal stiffness of support for the particle impact damper with elastic support.

关键词

颗粒碰撞阻尼 塑性变形 弹性支承 振动控制

Key words

Particle impact damping Plastic deformation Elastic support Vibration control

引用本文

导出引用
杜妍辰 刘喆 李海超. 带弹性支承的颗粒—钢球碰撞阻尼的实验研究[J]. 振动与冲击, 2013, 32(24): 56-60
DU Yanchen LIU Zhe LI Haichao. Experimental Study on the Particle - Ball Impact Damper with Elastic Support[J]. Journal of Vibration and Shock, 2013, 32(24): 56-60

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