کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
11000972 | 1428348 | 2018 | 36 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The wind effect on sound propagation over urban areas: Predictions for generic urban sections
ترجمه فارسی عنوان
تاثیر باد بر انتشار صدا در مناطق شهری: پیش بینی های بخش عمومی شهری
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کلمات کلیدی
پخش صدا در شهری، انکسار به پایین، سر و صدای ترافیکی سقف گیاهی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
چکیده انگلیسی
The effect of a downward refracting atmosphere on distant sound propagation over various generic urban areas is predicted. The work uses a two-step approach, by first computing the wind field with computational fluid dynamics (RANS-CFD), and then adopting the mean wind field in a computational acoustics (PSTD-CA) method. These approaches were found to be valid for the studied geometries. For an urban configuration with multiple building blocks, a sound source is located in a street canyon, representing road traffic, and receivers are located at a distance up to 500â¯m. From results of calculations for various urban configurations, it can be concluded that: the sound levels increase due to the presence of a downward refracting atmosphere, and this effect is larger for higher frequencies; the wind effect ranges from 15 to 23â¯dB(A); the urban topology close to the source and receiver can largely influence the wind effect; whereas vegetated roofs have the potential to reduce sound levels without wind, in a downward refracting atmosphere the broadband effect is small (<2â¯dB(A)), however, a potential for reducing noise levels by roofs with low-frequency sound absorption has been identified.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Building and Environment - Volume 144, 15 October 2018, Pages 519-531
Journal: Building and Environment - Volume 144, 15 October 2018, Pages 519-531
نویسندگان
M. Hornikx, M. Dohmen, K. Conen, T. van Hooff, B. Blocken,