考虑流体可压缩性的液压阻尼器振幅和动刚度频率依赖性研究  

Study on the Frequency Dependence of Hydraulic Damper Amplitude and Dynamic Stiffness Considering Fluid Compressibility

作　　者：黄鹏辉 康绍鹏 强红宾 刘凯磊 李煜昕 HUANG Penghui;KANG Shaopeng;QIANG Hongbin;LIU Kailei;LI Yuxin(School of Mechanical Engineering,Jiangsu University of Technology,Changzhou Jiangsu 213001,China)

机构地区：[1]江苏理工学院机械工程学院,江苏常州213001

出　　处：《机床与液压》2024年第11期100-104,共5页Machine Tool & Hydraulics

基　　金：国家自然科学基金项目(51805228);江苏省高等学校基础科学(自然科学)研究项目(22KJB460021,23KJA460006);常州市领军型创新人才引进培育项目(CQ20210093,CQ20220089)。

摘　　要：液压阻尼器因其优异的特性在国内被广泛用于各种桥梁、铁路连续梁、桥梁抗震改造。为研究液压阻尼器动刚度和振幅的频率依赖性内在影响机制,搭建了考虑阻尼介质压缩性的阻尼器力数学模型,利用AEMSim软件搭建液压阻尼器仿真模型,并对液压阻尼器进行现场实物试验,将仿真结果和试验结果对比分析。结果表明:液压阻尼器的动刚度随着加载频率的增加而增大;振幅随着加载频率的增加而减小;阻尼介质的压缩特性是影响阻尼器动刚度和振幅的关键因素。Hydraulic dampers are widely used in various bridges,railway continuous beams,and seismic retrofits of bridges in China due to their excellent characteristics.In order to study the internal influence mechanism of frequency dependence of dynamic stiffness and amplitude of hydraulic damper,a mathematical model of damper force considering the compressibility of damping medium was built,and a simulation model of hydraulic damper was built using AEMSim software.The hydraulic damper was tested on site,and the simulation results were compared with the test results.The results indicate that the dynamic stiffness of the hydraulic damper increases with the increase of loading frequency;the amplitude decreases with the increase of loading frequency;the compression characteristics of damping media are key factors affecting the dynamic stiffness and amplitude of dampers.

关 键 词：液压阻尼器 压缩性 频率依赖性 动刚度 振幅 

分 类 号：TH137[机械工程—机械制造及自动化]