多孔阻尼对脉动衰减器传递损失的影响  

The Influence of Porous Damping on Pulsation Attenuator Transmission Loss

作　　者：葛茂鑫 赵洪建 张志新[1] GE Mao-xin;ZHAO Hong-jian;ZHANG Zhi-xin(School of Mechanical Engineering,Dalian University,Dalian 116622,China)

机构地区：[1]大连大学机械工程学院,辽宁大连116622

出　　处：《液压气动与密封》2021年第3期32-36,共5页Hydraulics Pneumatics & Seals

摘　　要：为研究多孔阻尼对脉动衰减器传递损失的影响,提出了一种具有多颈部的三自由度脉动衰减器,通过建立脉动衰减器等效力学模型,分析流体阻尼类型和颈部结构参数对系统传递损失的影响规律,给出了脉动衰减器的设计方法。结果发现:随着流体阻尼非线性程度增加,准确定义流体类型对评估系统传递损失有显著提升;增加阻尼孔数目,可拓宽系统共振频带和提升传递损失;同孔数目下,增加孔径可增加共振频率、提升传递损失,孔长则与其变化规律相反,且对传递损失影响较小。To study the effect of porous damping on the transmission loss of pulsating attenuator,a three-degree-of-freedom pulsation attenuator with multiple necks is proposed.By establishing the equivalent mechanical model of the pulsation attenuator,the influence of fluid damping type and neck structural parameters on the transmission loss of the system is analyzed,and the design method of the pulsating attenuator is given.This is the case.The results show that with the increase of non-linearity of fluid damping,the accurate definition of fluid type can significantly increase the transmission loss of the evaluation system;increasing the number of damping holes can significantly broaden the resonance frequency band and increase the transmission loss of the system;increasing the aperture number can also increase the resonance frequency and enhance the transmission loss,and the length of the hole will change.On the contrary,it is insensitive to the change of transmission loss.

关 键 词：多孔阻尼 脉动衰减器 传递损失 影响 

分 类 号：TH137[机械工程—机械制造及自动化] TH703.63