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Experimental Study on Vehicle Interior Noise with Factors of Cooling Fan Beat Vibration
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[1]YAO Yun-shi,MA Fang-wu,FENG Zhong-xu,et al.Experimental Study on Vehicle Interior Noise with Factors of Cooling Fan Beat Vibration[J].Journal of Zhengzhou University (Engineering Science),2013,34(04):40-44.[doi:10.3969/j.issn.1671-6833.2013.04.010]
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Journal of Zhengzhou University (Engineering Science)[ISSN 1671-6833/CN 41-1339/T] Volume: 34 Number of periods: 2013 04 Page number: 40-44 Column: Public date: 2013-09-09
Title:
Experimental Study on Vehicle Interior Noise with Factors of Cooling Fan Beat Vibration
Author(s):
YAO Yun-shi1; MA Fang-wu2; FENG Zhong-xu1; cUO Zi-yu3
1.Key Laboratory for Highway Construction Technology and Equipment of Ministry of Education ， Chang’an University ，Xi’ an710064, China; 2.Zhejiang Ceely Automobile Institute Co. Ld，Hangzhou 311228,China; 3. Department of Ship Engineering,Weihai Vocational College，Weihai 264210，China
Keywords:
automotive engineering;  cooling fan ;  beat vibration;  noise;  comfort
CLC:
U461 TH12
DOI:
10.3969/j.issn.1671-6833.2013.04.010
Abstract:
In order to reduce interior noise caused by cooling fan,mechanism of beat vibration of double cool-ing fans was discussed with help of theoretical analysis and field test. The comparison tests of prototype werecarried on direct to the double cooling fans with and without optimizations. It was pointed that beat vibrationwas caused by double cooling fans with unbalance mass and little dfference in rotating speed,which affectedthe comfort of the vehicle.The interior noise has close relationship with noise of cooling fan and beat vibrationof noise was obvious.The interior noise of idle with high speed of cooling fans decreased from 48.32dB(A)without optimizations to 46.86 dB( A) with optimizations by adjusting the rotating speed difference of thedouble cooling fans to 20%and cutting unbalance mass by 10% .
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