摘要
基于反共振原理,设计了一种新型的流体浮筏隔振器.应用流体动量方程和结构振动理论推导了该隔振器的数学模型,分析了其隔振特性,得到了最优隔振频率和浮体浸入流体深度的关系式.仿真结果表明,当浮体浸入流体深度在有限的范围内变化时,新型隔振器会在从低频到高频的宽带内发生反共振现象.反共振条件下的力传递率可降至极低水平.流体浮筏隔振器具有很好的(尤其是低频)隔振效果.
A novel fluid-type floating raft vibration isolator based on anti-resonance principle is designed in this paper.The mathematical model of the floating raft is built based on the fluid momentum equation and the vibration theory.The isolation behavior of the floating raft is analyzed.The relationship between the optimum isolation frequency and the immersed depth of the floating body is obtained.It is found that the anti-resonance occurs over a wide band from lower to higher frequencies with the immersed depth of the floating body in a limited range.Utilizing the anti-resonance,the force transmissibility of the fluid-type floating raft can be reduced at very low levels.The raft enjoys an excellent performance of vibration isolation especially for low frequency vibrations.
出处
《力学与实践》
CSCD
北大核心
2012年第2期49-53,共5页
Mechanics in Engineering
基金
国家自然科学基金资助项目(11072075)
关键词
流体浮筏
反共振
隔振器
低频隔振
fluid-type floating raft
anti-resonance
vibration isolator
low frequency vibration isolation
