某试制车间搅拌机电机噪声预测与降噪设计
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摘要
工业企业员工长期在噪音环境中工作,会感到情绪烦燥不安,影响工作质量,严重者甚至会造成听力不可逆损伤。为了研究某公司产品试制车间的环境噪声水平以及降噪需求,文章对其主要噪声源搅拌机电机的总声功率级和现场环境噪声总声压级进行了声学试验测量和数值模拟,并开展了校核工作。随后针对搅拌机电机的声源特性提出了三种降噪设计方案。结果表明:可采用更换隔声效果更好的电机护罩,或者采用主要声源隔间隔离方法,以及房间特定位置处铺设吸声材料等方案来实现降噪设计。
Employees of industrial enterprises will feel upset and upset when they work in a noisy environment for a long time,which will affect the quality of their work. In serious cases, it will even cause irreversible hearing impairment. In order to study the environmental noise level and the demand of noise reduction in the trial production workshop of a company, the acoustic test measurement and numerical simulation of the total sound power level of the main noise source mixer motor and the total sound pressure level of the field environmental noise are carried out in this paper. And the verification work is carried out. Then three kinds of noise reduction design schemes are put forward according to the sound source characteristics of mixer motor. The results show that the noise reduction design can be realized by replacing the motor shield with better sound insulation effect, adopting the isolation method of the main sound source compartment, and laying sound absorbing materials at the specific position of the room.
Employees of industrial enterprises will feel upset and upset when they work in a noisy environment for a long time,which will affect the quality of their work. In serious cases, it will even cause irreversible hearing impairment. In order to study the environmental noise level and the demand of noise reduction in the trial production workshop of a company, the acoustic test measurement and numerical simulation of the total sound power level of the main noise source mixer motor and the total sound pressure level of the field environmental noise are carried out in this paper. And the verification work is carried out. Then three kinds of noise reduction design schemes are put forward according to the sound source characteristics of mixer motor. The results show that the noise reduction design can be realized by replacing the motor shield with better sound insulation effect, adopting the isolation method of the main sound source compartment, and laying sound absorbing materials at the specific position of the room.
引文
[1]敬禄锋,等.工业噪声危害及其控制对策[J].职业卫生与病伤,2002,4:303-303.
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[3]GBJ122-88.工业企业噪声测量规范[S].
[4]GB/T 50087-2013.工业企业噪声控制设计规范[S].
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[2]吴铭权.室内噪声的危害与控制[J].环境与健康杂志,2006,2:189-192.
[3]GBJ122-88.工业企业噪声测量规范[S].
[4]GB/T 50087-2013.工业企业噪声控制设计规范[S].
[5]杜功焕,等.声学基础[M].南京:南京大学出版社,2001.
[6]陈克安,等.声学测量[M].北京:机械工程出版社,2010.
[7]盛美萍,等.噪声与振动控制技术基础[M].北京:科学出版社,2011.
[8]马大猷.噪声与振动控制手册[M].北京:机械工业出版社,2002.
[9]陈秀媛.车间内墙面与墙角的吸声降噪处理[J].噪声与振动控制,1992,3:40-42.
[10]张人德,等.减振降噪阻尼材料及其应用[J].上海金属,2002,24(2):18-23.