摘要
针对离心式空调冷水机组的振动噪声问题,采用粒子阻尼技术进行减振降噪研究。首先,对振动特性进行分析,了解机组各结构振动情况以及振动传递路径;其次,建立有限元模型进行动力学分析,对空调机组进行模态分析,研究机组的振动敏感点,获得粒子阻尼器的最佳安装位置;然后,基于离散元法,设计冷水机组粒子阻尼器,比较最优粒子材质、粒径以及阻尼器不同布置方案的耗能值,得到最佳配置方案;最后,搭建实验台对所提方案进行验证。结果表明:冷水机组在386 Hz下,采用阻尼器最优方案时,压缩机机脚振动减少了4.89 dB,筏架振动减小了9.29 dB;在300 Hz下,压缩机振动减少了4.74 dB,筏架振动减少了11.39 dB,符合预期目标。笔者将粒子阻尼技术应用于空调冷水机组的振动控制中,为空调冷水机组的减振研究提供了新方法,具有重要的工程意义和应用价值。
To address the vibration and noise issues of centrifugal air conditioning chiller,particle damping technology is applied to reduce vibration and noise.First,vibration characteristics are analyzed to understand the vibration of each structure and the vibration transmission paths within the unit.Second,a finite element model is established for dynamic analysis,modal analysis is performed on the air conditioning unit to identify vibrationsensitive points.The optimal installation position for the particle damper is determined.Third,based on the discrete element method,the particle damper for the chiller is designed.The energy dissipation is compared for different particle materials,particle sizes and damper arrangement schemes to obtain the best configuration.Finally,a test bench is built for damper verification.The experimental results show that under the optimal damper configuration,the vibration of the compressor foot is reduced by 4.89 dB and the raft frame vibration is reduced by 9.29 dB at 386 Hz.At 300 Hz,the compressor vibration is reduced by 4.74 dB and the raft frame vibration is reduced by 11.39 dB,meeting the expected target.Particle damping technology is applied to vibration control of air conditioning chiller,providing a new method for vibration reduction of such units and demonstrating significant engineering importance and application value.
作者
肖望强
邵堃
陈辉
张治平
董继鲁
姚伍平
XIAO Wangqiang;SHAO Kun;CHEN Hui;ZHANG Zhiping;DONG Jilu;YAO Wuping(School of Aerospace Engineering,Xiamen University Xiamen,361000,China;State Key Laboratory of Air-Conditioning Equipment and System Energy Conservation Zhuhai,519070,China;Wuhan Second Ship Design and Research Institute Wuhan,430064,China)
出处
《振动.测试与诊断》
2025年第4期782-790,848,共10页
Journal of Vibration,Measurement & Diagnosis
基金
国家自然科学基金资助项目(51875490)
空调设备及系统运行节能国家重点实验室开放基金资助项目(ACSKL2018KT01)
中央高校基本科研业务费专项资金厦门大学校长基金资助项目(20720210042)。
关键词
空调冷水机组
粒子阻尼
离散元
力链
振动控制
air conditioning chiller
particle damping
discrete element
force chain
vibration control
作者简介
第一作者:肖望强,男,1981年4月生,博士、教授、博士生导师。主要研究方向为机械动力学与减振降噪。曾发表《基于颗粒阻尼的内燃动车组动力包构架多工况减振研究》(《机械工程学报》2022年第58卷第4期)等论文。E-mail:wqxiao@xmu.edu.cn;通信作者:张治平,男,1982年9月生,硕士、高级工程师。主要研究方向为压缩机设计与研究。E-mail:zzping001@126.com。
