本文共22頁，1.4萬余字，是一篇不錯(cuò)的參考資料

摘要：設(shè)計(jì)題目為華南某市航空發(fā)動(dòng)機(jī)組試車間噪聲控制。發(fā)動(dòng)機(jī)組在運(yùn)行噪聲主要為機(jī)械性噪聲和渦汽流噪聲，屬中高頻噪聲。發(fā)動(dòng)機(jī)組總A計(jì)權(quán)聲壓級(jí)為：121.5 dB(A)，要求降噪治理后，操作室聲壓級(jí) ≤65 dB(A)。噪聲控制措施：操作室墻面滿鋪30 mm厚鋁穿孔吸聲板，100 mm安裝后空腔；天花滿鋪30 mm厚鋁穿孔吸聲板，200 mm安裝后空腔門為隔聲門。試車間墻面滿鋪25 mm厚不銹鋼穿孔吸聲板，50 mm安裝后空腔；采用聲閘雙重隔聲門，尺寸分別為2.4×1.64 m、2.149×1.04 m；雙層3×8 mm厚防彈玻璃隔聲窗，50 mm空腔；進(jìn)風(fēng)口選用阻性消聲器，尺寸為5×3×2 m，消聲片為150 mm厚不銹鋼護(hù)面。治理后，操作室總聲壓級(jí)由121.5 dB（A）降至58.25 dB（A）。
關(guān)鍵詞：噪聲控制 ；穿孔吸聲板 ；隔聲門 ；阻性消聲器

Noise Control Design of the Aero Motor Shafts Test Workshop in the South China

Abstract:Design subect is the noise control design of the aero motor shafts test workshop in the South China . The noises of engine group are mainly mechanical noises and vortex air flow noises when operating, belonging to the low and high frequency noises. The total weighted sound pressure level of engine group is 121.5 dB(A). And it requires that sound pressure level is ≤65 dB(A) in operating room after noise control. The measures of noise control: the wall of operating room is completely paved with 30mm thickness aluminum perforated acoustic panel, 100mm cavity; the ceiling is completely paved with 30mm thickness aluminum perforated acoustic panel, and 200mm cavity door is used as the sound insulation door. And the wall of test workshop is completely paved with 25mm thickness stainless steel perforated acoustic panel, 50mm cavity; using the sound lock double sound insulation door, the sizes are 2.4×1.64 m、2.149×1.04 m respectively; Double layer 3×8 mm thickness bulletproof glass sound insulation window, 50mm cavity; air inlet uses dissipative muffler, the size is 5×3×2 m, sound splitter is 150 mm thickness stainless steel protective facing. After noise control, the total sound pressure level of operating room is reduced from 121.5 dB（A）to 58.25 dB（A）.
Key worlds: aero motor shafts；noise control；perforation acoustic board；bulletproof doors； dissipative muffler


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