颗粒阻尼的动态特性研究  

Dynamic characterstics of particle dampers

作　　者：胡溧[1] 黄其柏[1] 柳占新[1] 王剑亮[1] 

机构地区：[1]华中科技大学机械科学与工程学院,武汉430074

出　　处：《振动与冲击》2009年第1期134-137,共4页Journal of Vibration and Shock

基　　金：国家自然科学基金资助项目(50075029)

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。The particle damping technology has been used successfully in many fields for vibration reduction.However,it is difficult to predict its damping characteristics due to complex collisions in the dense particle flow.A micromeritic model was established here to study the effect of geometry on the characterization of particle dampers.The nonlinear characteristics of particle dampers were also studied experimentally to model the nonlinear damping of particle dampers as an equivalent mathematical model that can be applied directly to engineering structures for design.

关 键 词：颗粒阻尼 非线性阻尼 粉体力学模型 摩擦减振 等效阻尼 

分 类 号：TH113.1[机械工程—机械设计及理论]