小中间质量对振动功率流的影响  

The Effects of Little Intermediate Mass on Power Flow

作　　者：张克国[1] 王世寰[1] 林淑霞[1] 

机构地区：[1]山东大学威海分校信息工程学院,山东威海264209

出　　处：《噪声与振动控制》2008年第2期55-57,共3页Noise and Vibration Control

摘　　要：应用导纳矩阵分析法研究了将质量块插入隔振器之间对功率流的控制机理,研究表明,小中间质量与机器及基础之间的耦合作用很弱,每一个支撑点都可以被独立地控制,这样对复杂激励下的平动、转动等控制就有了实现的可能;在越过因加入小中间质量而使系统增加的固有频率后,功率流得到大幅衰减,使附加频率低于需隔振的频域则可获得较宽的隔振范围。Based on mobility matrices, the control mechanism of little intermediate mass inserting in isolator is studied theoretically, deriving the expressions of the power flow spectra and plotting its curve. The studies show that the active control can be executed on every support separately, which makes it possible that adopting active control on linear and rotatory motion. The isolation effect at high frequencies can be improved by inserting the intermediate mass. The medium mass and the base＇s stiffness can affect the positions of their resonance respectively, which can be used to acquire wide isolation frequencies range.

关 键 词：振动与波 中间质量 功率流 隔振 

分 类 号：TB53[理学—物理]