颗粒阻尼的动态特性研究

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振动与冲击 ›› 2009, Vol. 28 ›› Issue (1) : 134-137.

论文

颗粒阻尼的动态特性研究

胡溧黄其柏柳占新王剑亮

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The dynamic characterization of particle dampers

Hu Li Huang Qibai Wang Jianliang

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文章历史 +

摘要

颗粒阻尼技术已经成功的应用于多个领域抑制振动。然而，由于颗粒阻尼复杂的碰撞和摩擦减振机理，很难预测其减振特性。本文建立了颗粒阻尼的粉体力学模型，并用于研究颗粒阻尼容器的截面形状及尺寸关系对其减振特性的影响。通过试验研究，揭示了颗粒阻尼的非线性阻尼特性，并应用等效阻尼的原理提出了合理的颗粒阻尼的等效数学模型。

Abstract

The particle damping technology has been used successfully in many fields for vibration reduction. However, it is difficult to predict the damping characteristics due to complex collisions in the dense particle flow. In this paper, the micromeritics model is established here to study the effect of the geometry on the characterization of particle dampers. The nonlinear characteristics of particle dampers are also studied experimentally to model the nonlinear damping of particle dampers as equivalent dampers that can be applied directly to engineering structures at the design stage.