厂房内声屏障课程设计.pdfVIP

内蒙古工业大学 《噪声控制工程》课程设计 摘要 某厂发电机车间有3台直流发电机，车间内噪声特别强烈，在距机组1m处测得 中心频率500Hz的倍频程声压级达108-112dB，A声级达107-108dB。严重影响了整 个车间工人的健康和通讯联系。研究表明，噪声能引发多种疾病，因此人们把噪声称 为无形杀手。它的损害以神经系统症状最明显，会出现头晕、头痛、失眠、易疲劳、 爱激动、记忆力衰退、注意力不集中等症状，并伴有耳鸣、听力减退。许多证据表明， 噪声还是造成心脏病和高血压的重要原因。特别强的噪声还会影响设备正常运转，损 坏建筑结构等。此次设计要对工厂车间噪声进行隔声降噪，属于室内噪声，使之符合 我国 《工业企业噪声控制设计规范》（GB/T50087-2013），小于等于85dB。本次的目 标降噪量为23dB，通过计算设计声屏障，使之达到降噪要求。 主要工作：声屏障的声学设计，位置的确定，声屏障的隔声要求，声屏障形状的 选择，声屏障插入损失的确定，声屏障设计的调整。 关键词：室内噪声；声屏障；声学设计 内蒙古工业大学 《噪声控制工程》课程设计 Abstract A factory workshop has three dc generators which bring particularly strong noise .Generator and sound source have 1m distance measured at center frequency of 500 HZ octave sound pressure level of 108-112 db, A sound level of 107-108 db. Seriously noise is detrimental to the whole workshop workers health and communications. Such noise on human damage is very big. Studies have shown that noise can cause many diseases, so people called the noise invisible killer. The most obvious and its damage to the nervous system symptoms can appear giddy, headache, insomnia, fatigue, love, excitement, memory loss, the symptom such as concentration, accompanied by tinnitus, hearing loss. Many evidences prove that noise is the important cause of heart disease and high blood pressure. Particularly strong noise can also affect the normal operation of damaged structures, etc. We want to acoustic noise reduction of noise, the design to make it conform to the specifications for design of industrial noise control in China (GB/T50087-2013), less than or equal to 85 db (A). The goal of the noise reduction for 23 db, the design of noise barriers through calculation, make it meet the requirements of noise. Main j obs: acoustic design of noise barrier