摘要
单层隔振系统在高频域的缺陷使人们进而追求更为复杂的结构来提高隔振效果 ,将中间质量插入振源和被隔离系统之间是一个简单有效的方法 ,适合在工程中应用 ;通过对具有中间质量隔振系统进行理论建模、推导传递功率谱表达式、绘制功率谱传递曲线 ,研究了振动功率流的传递机理 ,研究表明 ,具有中间质量隔振系统能在高频域获得较为理想的隔振效果 ;从振动控制的观点出发 ,如果空间允许最好对称安装 ;中间质量能够改变三阶谐振的位置 ,基础刚度则能改变基础的共振峰值位置 。
The limitation of one-stage isolation system at high frequencies makes people study more complicated structure to improve the isolation effect. Insert ing the medium mass between the vibration source and the base is an effective wa y, which can be easily applied in engineering. The mechanism of power flow tr ansmissi on in this structure is studied by presenting the theoretical model, deriving th e exp ressions of the power flow spectra and plotting its curve. The studies show that the isolation effect at high frequencies can be improved by inserting the inter mediate mass. The system should adopt symmetrical structure from the viewpoint o f vibration control. Furthermore, the medium mass and the base's stiffness can affect the positions of their resonance respectively, which can be used to acqui re wide isolation frequencies range.
出处
《山东大学学报（工学版）》
CAS
2004年第1期35-38,43,共5页
Journal of Shandong University（Engineering Science）
基金
国家自然科学基金资助项目 ( 50 2 750 85)
关键词
中间质量
功率流
隔振
intermediate mass
power flow
vibration isolation
