文章摘要
刘海生,李文婷,李佳菊,田碧玉,王吉荣.洗碗机SEA噪声预测模型的探讨[J].声学技术,2011,(6):505~512
洗碗机SEA噪声预测模型的探讨
Research on dishwasher SEA noise prediction model
投稿时间:2010-12-20  修订日期:2011-03-23
DOI:
中文关键词: 洗碗机  统计能量分析  水流冲击  声振耦合  噪声预测模型
英文关键词: dishwasher|statistical energy analysis|water current impact|vibroacoustic coupling|noise prediction model
基金项目:国家自然科学基金项目(10774114)
作者单位E-mail
刘海生 同济大学声学研究所, 上海200092 56614735@163.com 
李文婷 同济大学声学研究所, 上海200092  
李佳菊 同济大学声学研究所, 上海200092  
田碧玉 同济大学声学研究所, 上海200092  
王吉荣 同济大学声学研究所, 上海200092  
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中文摘要:
      洗碗机基本属于线性、保守和弱耦合的双壳型声振耦合系统。水流激励是使其产生噪声的主要激励源,具有宽频不相干的特点。根据统计能量分析理论建立的洗碗机250 Hz和500 Hz倍频带声功率级(Lwf)统计能量分析(Statistical Energy Analysis,SEA)噪声预测模型的精度分别为4 dB和2 dB。根据该模型制定的洗碗机降噪措施取得明显成效:250Hz和500Hz倍频带声功率级分别降低12 dB和13dB,总声功率级降低了7dB。
英文摘要:
      The dishwasher could be viewed as a linear,conservative and weak-coupled vibroacoustic system with dou-ble-shell.Water current impact is the main excitation with broadband and non-correlative feature to make noise of the dishwasher.The SEA noise band sound power level(Lwf) prediction model based on Statistical Energy Analysis method has high precision: the deviation of 250 Hz and 500 Hz octave is less than 4 dB and 2 dB respectively.The measure which has been put forward by the SEA model yields good result on dishwasher noise control: the Lwf of 250 Hz and 500 Hz octave could be reduced by 12 dB and 13 dB respectively,the total Lwf could be reduced by 7 dB.
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