膜片式流体脉动衰减器固有特性分析  

Analysis of natural characteristics of membrane fluid pulsation attenuator

作　　者：贺尚红[1] 王守兵[2] 王文[1] 

机构地区：[1]长沙理工大学汽车与机械工程学院,湖南长沙410076 [2]中国南车股份有限公司,湖南株洲412001

出　　处：《中南大学学报（自然科学版）》2015年第4期1247-1252,共6页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(51275059);湖南省自然科学基金资助项目(2015JJ4003;14JJ7042)~~

摘　　要：提出一种膜片共振式流体脉动衰减器结构,其作用机理类似于结构共振式吸振器。使用柔性膜片代替结构振动式脉动衰减器的振动质量块,解决传统脉动衰减器体积庞大的问题。建立预拉伸柔性膜片振动的数学模型,并对其求解得到膜片的固有频率。用有限元法对脉动衰减器的流固耦合特性进行建模,对该流体脉动衰减器固有特性进行仿真分析,得到流固耦合情况下膜片的固有频率。研究结果表明:膜片式脉动衰减器对液压系统流体脉动有良好滤波效果,当膜片产生共振时,脉动衰减器的插入损失超过20 d B。The structure of membrane fluid pulsation attenuator was proposed. Its mechanism of this attenuator is similar to that of resonant absorber with mass-spring structure. The mass of the resonator is replaced by a flexible hyperelasticity membrane. So the attenuator can be fabricated with compact structure, and the fatal shortcomings of bulky with traditional attenuator can be avoided. The dynamic model of the pre-stretch flexible membrane was established and the natural frequency was calculated theoretically. The fluid-structure coupling effect of the attenuator was modeled and the dynamic characteristics were simulated by the finite element method. The coupling frequency of the membrane was obtained. The results show that the membrane fluid pulsation attenuator is effective in attenuation of fluid pulsation of hydraulic systems, and when the membrane resonates, the insertion loss of the attenuator is more than 20 d B.

关 键 词：脉动衰减器 柔性膜片 流体脉动 有限元法 

分 类 号：U664.84[交通运输工程—船舶及航道工程] TB53[交通运输工程—船舶与海洋工程]