空调室外机机壳模态仿真与试验研究  

Modal simulation and experimental study on outdoor unit casing of air conditioner

作　　者：刘武祥 夏增强 吴俊鸿 吴庆状 刘文钢 谢军龙[2] 潘曦 LIU Wuxiang;XIA Zengqiang;WU Junhong;WU Qingzhuang;LIU Wengang;XIE Junlong;PAN Xi(Xiaomi Technology(Wuhan)Co.,Ltd.,Wuhan 430000,China;Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]小米科技(武汉)有限公司,武汉430000 [2]华中科技大学,武汉430074

出　　处：《流体机械》2024年第1期7-13,68,共8页Fluid Machinery

基　　金：中国博士后科学基金面上资助项目(2022M721239)。

摘　　要：针对某款空调室外机机壳振动噪声大的问题,采用模态分析的研究方法对空调室外机机壳进行结构优化设计。对空调室外机机壳整体进行了不同方案的模态分析,获得整机机壳的前十阶固有频率与振型,将其与锤击法试验所测整机机壳模态结果进行了对比,结果表明:采用顶板无螺栓侧不添加约束条件的模拟方法获得的整机机壳模态更符合试验测试结果,两者误差在3%以内。在此基础上,分别对机壳各结构件进行了模态分析,获得了每一结构件的前3阶固有频率与振型,并对底板、支架关键部件提出了优化方案。通过对室外机机壳减小底板的筋的面积以及增加筋的数量优化钣金件结构,可调整整体结构的固有频率,避开压缩机工作频率以及共振现象产生,有效地改善了振动噪声大的问题。In order to solve the problem of big vibration and noise of a certain type of air conditioning outdoor unit housing,the research method of modal analysis was used to optimize the structural design of air conditioning outdoor unit housing.Firstly,the modal analysis of the whole outdoor unit housing of the air conditioner was carried out in different schemes,and the first ten order natural frequencies and vibration modes of the whole unit housing were obtained.The modal results of the whole unit housing measured by the hammer method were compared.The comparison results show that the model of the whole unit housing obtained by the simulation method without bolt-on roof side without adding constraint conditions is more consistent with the experimental test results,and the error of both is less than 3%.On this basis,the modal analysis of each structural part of the housing was carried out,and the first 3 orders of natural frequency and vibration shape of each structural part were obtained,and the optimization scheme of the key components of the bottom plate and support was put forward.By reducing the area of reinforcement of the bottom plate and increasing the number of reinforcement to optimize the structure of sheet metal parts,the natural frequency of the overall structure can be adjusted to avoid the working frequency of the compressor,so as to avoid resonance phenomenon,and effectively improve the problem of high vibration and noise.

关 键 词：空调 室外机 模态分析 锤击法试验 

分 类 号：TH12[机械工程—机械设计及理论] TB652[一般工业技术—制冷工程]