摘要
本文对存在干摩擦阻尼、粘性阻尼和c.x2阻尼系统的自由振动及受迫振动特性进行了解析及数值计算,得到干摩擦阻尼系统自由振动的加速度响应在速度零点有一突变,这一变化量为定值,且只与系统固有频率ωn及摩擦当量位移xk有关。分析比较了干摩擦阻尼、粘性阻尼及c.x2阻尼的减振特性,并重点分析了粘性阻尼与c.x2阻尼在抗振及减振方面的特性,分析了组合阻尼的减振效果,为工程减振基于不同类型阻尼相结合的新型阻尼器的开发提供指导意义。
Characteristics of free vibration and forced vibration of a damped system with dry frictional damping,viscous damping and c x·2 damping are analyzed and calculated,acceleration response of free-vibration of the dry frictional damped system has a sudden change when x· is zero,the change value is constant and depends only on the natural frequency ωn and the displacement xk due to dry friction.The characteristics of reducing vibration for the three types of damping are compared,and analysis is focused on the characteristics of reducing vibration of viscous damping and c x·2 one,respectively.The reducing vibration effect of combination of dampings is also analyzed,a guidance is given to develop a new type damper based on the combination of the different types of damping.
出处
《振动与冲击》
EI
CSCD
北大核心
2007年第7期40-42,68,共4页
Journal of Vibration and Shock
基金
湖南省自然科学基金项目(编号:06JJ20040)
关键词
干摩擦
粘性阻尼
阻尼器
振动
组合阻尼
dry friction,viscous damping,damper,vibration,combination of dampings
