Claus风机噪声测量结果与频谱分析

Claus fan noise measurement and spectrum analysis

目的了解claus风机噪声污染特性,为指导噪声治理提供科学依据。方法对2015年6月正常生产的10台claus风机噪声强度和频谱数据统计学分析。结果 100%claus风机噪声超过100 dB(A),且来源于自身,其他声源的声压级叠加可忽略不计;频谱分析为低、中、高宽带频谱;100%风机噪声强度高于频谱峰值;claus风机以高频噪声污染为重;10台风机环比70%的频谱声压级差异均有统计学意义(均P<0.05);两车间平均频谱声压级差异无统计学意义(P>0.05)。结论倍频程分析claus风机噪声频带过宽,不能涵盖其噪声全貌,建议日后频谱分析采用1/2或1/3倍频程。

Objective To understand the noise pollution characteristics of Claus fan.Methods Statistical analysis of noise intensity and spectrum data of 10 Claus fans produced in normal production were applied. Results Of 100%（10/10）claus fan noise was more than 100 dB（A）,and from their own,other sound source sound pressure level superposition was negligible; spectrum analysis for low medium and high broadband spectrum; 100%（10/10） fan noise intensity was higher than the peak value; Claus fan with high frequency noise pollution was heavy; 10 Typhoon aircraft were 70%（7/10） of the spectrum of sound pressure level differences were statistically significant（P〈0. 05）; there was no significant difference of average sound pressure level spectrum two workshop（all P〈0.05）.Conclusion Octave analysis Claus fan noise band is too wide,can not cover the noise picture,it is recommended that the spectrum analysis be used in the future with 1/2 or 1/3 octave.