流体隔振浮筏反共振特性的试验研究  

Experimental study on the anti-resonance characteristic of fluid-type floating raft

作　　者：徐道临[1] 刘怀远[1] 刘春嵘[1] 

机构地区：[1]湖南大学汽车车身先进设计制造国家重点实验室,湖南长沙410082

出　　处：《振动工程学报》2013年第5期641-646,共6页Journal of Vibration Engineering

基　　金：国家自然科学基金资助项目(11072075;11272116)

摘　　要：针对低频隔振问题,基于反共振原理设计制造了一个带有液面高度调节器的单层流体隔振浮筏。根据不同的激振频率调节液面高度,对浮筏力传递率与激振频率的关系进行了系列试验研究,验证了浮筏的反共振原理隔振的有效性。进一步提出调节浮筏侧边的流体通道间隙方法,试验验证了间隙调节方法可有效调节反共振频率。基于液面高度-反共振频率曲线和调节间隙-反共振频率曲线的试验比较,从理论和试验两方面阐述了调节液体通道间隙与调节液面高度两种方法对调节浮筏反共振频率的优点与不足,提出了兼顾低传递率和宽隔振频带的组合调控反共振频率的方法。A prototype of single-deck floating raft vibration isolator system with a fluid level controller was developed based on anti-resonance mechanism for attenuating low-frequency vibration.For verifying the effectiveness of anti-resonance mechanism,a series of experimental studies had been conducted on the characteristics of the force transmissibility against excitation frequency by tuning liquid levels.Furthermore a method of tuning liquid flowing gap was proposed and the experimental tests demonstrated the effectiveness of the method.Based on the experimental comparison between the tuning liquid level method and the tuning flowing gap method using anti-resonance frequency curves,a discussion of advantages and disadvantages of these two methods were provided according to the efficiency of tuning anti-resonance frequency,and a combination of the both schemes was suggested for the improvement of vibration attenuation in terms of lower force transmissibility and wider isolation bandwidth.

关 键 词：流体浮筏 反共振 低频隔振 液面高度调节器 

分 类 号：TU311.3[建筑科学—结构工程] TU352.1