空调室外机振动噪声的传递路径研究

发布时间：2018-01-06 19:37

本文关键词：空调室外机振动噪声的传递路径研究　出处：《昆明理工大学》2016年硕士论文　论文类型：学位论文

【摘要】：随着人们生活水平的持续改善,空调逐渐成为人们日常生活中不可或缺的家电产品,在生活中的地位也越来越重要。噪声响应低,振动幅度小,是判断家用空调舒适度、质量品质好坏的重要参考指标。本论文以空调室外机为研究对象,采用传递路径分析方法,并建立室外机的传递路径分析模型,结合实验对空调室外机的振动和噪声特性进行了分析研究。首先介绍了传递路径分析方法的基本理论,以及基于传递函数来研究系统减振降噪的方法。分析了空调室外机的振动与噪声的产生机理,依据实际情况,构建空调室外机的传递路径分析模型,分析了结构声传递路径的组成并且详尽介绍了获取该传递函数的方法,并说明了每一步骤的方法和注意的要点。在半消声室内,进行空调室外机的振动与噪声的传递路径分析试验。首先研究了空调室外机目标点和指示点的噪声特性,结果表明,空调室外机的噪声频率主要集中在1000Hz以下,其中300Hz-360Hz是其主要频段。采用锤击法获取空调室外机的各路径传递函数,以及工况下各条传递路径支撑点处所受到的工作载荷,在目标点处将拟合的频谱与实际测量的噪声频谱进行对比,发现室外机的振动噪声主要是由结构声传递路径引起的。在不同工况下,对空调室外机每条传递路径的工作载荷进行分析,结合空调室外机的各传递路径的传递函数,结果表明,压缩机30Hz工况下,压缩机下部右后支撑位置的水平方向和压缩机下部右后支撑位置的垂直方向的贡献量是最大的；压缩机60Hz工况下,压缩机下部右后支撑位置的水平方向和压缩机下部左前支撑位置的垂直方向的贡献量是最大的；压缩机80Hz工况下,压缩机下部右后支撑位置的水平方向和压缩机右支撑的垂直方向的贡献量是最大的。
[Abstract]:With the continuous improvement of the living standards of the people, the air conditioning appliances gradually become indispensable in people's daily life, in the life of the increasingly important status. In response to low noise, small vibration amplitude, is to determine the comfort of home air conditioners, an important reference index for the quality of the quality. In this paper, the air conditioner outdoor unit as the research object, analysis the method of transfer path, and establish the outdoor machine transfer path analysis model, combined with the characteristics of vibration and noise experiment of outdoor unit of air conditioner are analyzed. The author first introduces the theory of transfer path analysis method, and method based on the transfer function of the system vibration and noise reduction. Analysis of the mechanism of vibration and noise of the air conditioner outdoor the machine according to the actual situation, the transfer path of building air conditioning analysis model, the paper analyzes the structure of sound transmission path and detailed introduced. To obtain the transfer function method, and explains the main points and pay attention to each step. In a semi anechoic room, transmission path of vibration and noise of the outdoor unit of air conditioner test analysis. Firstly, the noise characteristics of the air conditioner outdoor unit indicating the target point and the research results show that the main noise frequency of outdoor unit of air conditioner in the following 1000Hz, where 300Hz-360Hz is the main band. The transfer function of each path by hammering method for outdoor unit of air conditioner, and under the condition of transfer paths of support points subjected to loads, at a target point will be the noise spectrum and the actual spectrum measurement were compared, found the vibration and noise of the outdoor machine is mainly caused by the sound transmission path. Under different conditions, each of the air conditioner outdoor unit work load transfer path analysis, combined with the air conditioning of the transmission path. The transfer function, the results show that the compressor condition of 30Hz, contribution of vertical compressor at the lower right of the horizontal position of the rear support and support position at the lower right after the compressor is the largest compressor; condition of 60Hz, the amount of contribution to support the vertical support position and the horizontal position of the lower part of the left front compressor compressor at the lower right of the is the largest compressor; condition of 80Hz, the amount of contribution to support the vertical direction and horizontal direction of the compressor supporting right at the lower right after the compressor is the biggest.

【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TB657.2;TB535

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