囊式空气弹簧流固耦合建模及刚度特性分析  

Modeling and Stiffness Characteristics Analysis of Fluid Structure Coupling of CAS

作　　者：张远鹏 丁建国[2] 陈鹏[2] 拜立岗 江民 Zhang Yuanpeng;Ding Jianguo;Chen Peng;Bai Ligang;Jiang Min(School of Safety Science and Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;School of Physics,Nanjing University of Science and Technology,Nanjing 210094,China;China Electronics System Engineering Second Construction Co.,Ltd.,Wuxi 214135,Jiangsu,China;School of Energy and Power Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学安全科学与工程学院,南京210094 [2]南京理工大学物理学院,南京210094 [3]中国电子系统工程第二建设有限公司,江苏无锡214135 [4]南京理工大学能源与动力工程学院,南京210094

出　　处：《科技通报》2025年第4期51-57,共7页Bulletin of Science and Technology

基　　金：国家自然科学基金项目(青年科学项目)(52305112)。

摘　　要：空气弹簧作为一种理想的隔振元件,在半导体加工、高精密制造等领域有着广泛的应用。本文以囊式空气弹簧(convoluted air spring,CAS)为研究对象,由于腔内气体与弹簧囊体间存在相互作用,为保证计算精度,采用流固耦合的方法建立空气弹簧的有限元模型。使用ANSYS Mechanical/Fluent有限元软件计算空气弹簧模型的承载力与垂向刚度特性,分析初始气压、囊体等效材料强度、不同结构参数对其变化规律的影响,并设计试验对空气弹簧的垂向刚度特性进行测试,试验与仿真结果高度吻合。结果表明:初始气压、材料属性均对空气弹簧垂向刚度与承载力有显著影响,结构参数对其垂向刚度特性影响较小。Air springs,as an ideal vibration isolation component,have a wide range of applications in high-precision manufacturing,and other fields.This article takes the convoluted air spring(CAS) as the research object,considers the interaction between the gas inside the cavity and the spring capsule,and establishes a finite element model of the air spring using fluid structure coupling method.Use ANSYS Mechanical/Fluent finite element software to calculate the bearing capacity and vertical stiffness characteristics of the air spring model,analyze the influence of initial air pressure,equivalent material strength of the bladder,and different structural parameters on its variation law,and design experiments to test the vertical stiffness characteristics of the air spring.The experimental and simulation results are highly consistent.The results indicate that both initial air pressure and material properties have a significant impact on the vertical stiffness and bearing capacity of air springs,while structural parameters have a relatively small effect on their vertical stiffness characteristics.

关 键 词：空气弹簧 流固耦合建模 垂向刚度 有限元分析 

分 类 号：TH135.2[机械工程—机械制造及自动化]