期刊论文

He, Shanghong(heshanghong@126.com)

中文

中南大学学报(自然科学版)

1672-7207

2015

46

4

1247-1252

10.11817/j.issn.1672-7207.2015.04.011

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）~~；

本校为第一且通讯机构

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 dB。

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 o...