空气能热水器低频噪声分析与控制  

Analysis and Control of Low Frequency Noise of Air Source Water Heaters

作　　者：乔晋红[1] 陈剑[1] 沈忠亮[1] 李家柱[1] 史韦意[1] 

机构地区：[1]合肥工业大学噪声振动工程研究所,合肥230009

出　　处：《噪声与振动控制》2015年第5期207-211,共5页Noise and Vibration Control

摘　　要：针对某型空气能热水器,借鉴汽车NVH特性研究技术,利用试验方法采集样机数据,分析数据中异常噪声频率分布,识别出主要噪声频率。在空气能热水器机箱下部结构有限元与声学有限元以及声—固耦合有限元建模基础上,分别对三者进行模态频率计算,通过对比分析三者的模态频率,确定空气能热水器低频噪声产生的主要原因。根据分析结果对机箱结构优化和改进,并对整改机型进行试验测试。结果表明,与样机相比整改机型的低频噪声得到很好地控制,为空气能热水器低频噪声的分析与控制提供一种有效的方法。A type of air source water heaters was studied. Referring to the technology in automotive NVH characteristics research, the frequency distribution of abnormal noise in the measurement data of an air source water heater prototype was analyzed to identify the main noise frequencies. The finite element model, acoustic finite element model and acoustic-structure coupled finite element model for the infrastructure of the air source water heater were built respectively to compute the modal frequencies. Through the comparative analysis of the three kinds of modal frequencies, the main cause of low-frequency noise of the heater was determined. According to the results of analysis, the structure of the air source water heater was optimized, improved and tested. The results show that compared with the prototype, the low-frequency noise of the optimized heater can be well controlled. This paper provides an effective method for the analysis and control of low-frequency noise of air source water heaters.

关 键 词：声学 空气能热水器 低频噪声 声-固耦合 模态频率 结构优化 

分 类 号：TM172[电气工程—电工理论与新技术]