压缩机支撑结构减振降噪分析研究
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摘要
本文以一款噪声振动较大的压缩机支撑结构为载体,采用噪声源分析、模态试验和模态仿真的方法,分析其原因为压缩机支撑底板在65～68Hz范围内产生的共振,通过改变压缩机支撑底板的刚度、质量和约束等参数,使其一阶固有频率达到115Hz,避免因变频压缩机宽工作频率下所产生的共振问题,也显著降低了整机运行时的振动,整机降噪约1.1 dB(A)。
In this paper, a compressor support structure with large noise and vibration is used as research object. The methods of noise source analysis, modal test and modal simulation are adopted to analyze its reason that is the resonance of the compressor support bottom plate in the range of 65～68 Hz. By changing the stiffness, quality and constraints of the compressor support bottom plate, the first natural frequency of the compressor reaches 115 Hz so as to avoid the resonance in wider work condition of variable frequency compressor, the vibration of the whole machine is also significantly reduced, and the noise reduction value is about 1.1 dB(A).
In this paper, a compressor support structure with large noise and vibration is used as research object. The methods of noise source analysis, modal test and modal simulation are adopted to analyze its reason that is the resonance of the compressor support bottom plate in the range of 65～68 Hz. By changing the stiffness, quality and constraints of the compressor support bottom plate, the first natural frequency of the compressor reaches 115 Hz so as to avoid the resonance in wider work condition of variable frequency compressor, the vibration of the whole machine is also significantly reduced, and the noise reduction value is about 1.1 dB(A).
引文
[1]杨景义.振动模态分析原理[M].北京:北京工业学院,1986.
[2]傅志芳.模态分析与参数识别[M].上海:上海交通大学出版社,1985.
[3]徐建中,姚思,查诚林,等.降低冰箱压缩机机械噪声的试验研究[J].家电科技,2013(12):84-85.
[4]招伟,空调室外机噪声源的系统分析及确定[J].制冷与空调,2007(02):24-28.
[5]冯海星,高云凯,刘爽.基于传递路径分析的车内噪声源识别[J].机械设计,2013(07):19-24.
[6]江华,李欣.旋转式空调压缩机的振动和噪声研究[J].机电工程技术,2005(08):53-56+136.
[7]朱雄云,李双,王安柱,等.旋转压缩机低频噪声源识别及噪声抑制[J].苏州大学学报(工科版),2009(1).
[2]傅志芳.模态分析与参数识别[M].上海:上海交通大学出版社,1985.
[3]徐建中,姚思,查诚林,等.降低冰箱压缩机机械噪声的试验研究[J].家电科技,2013(12):84-85.
[4]招伟,空调室外机噪声源的系统分析及确定[J].制冷与空调,2007(02):24-28.
[5]冯海星,高云凯,刘爽.基于传递路径分析的车内噪声源识别[J].机械设计,2013(07):19-24.
[6]江华,李欣.旋转式空调压缩机的振动和噪声研究[J].机电工程技术,2005(08):53-56+136.
[7]朱雄云,李双,王安柱,等.旋转压缩机低频噪声源识别及噪声抑制[J].苏州大学学报(工科版),2009(1).