A STUDY OF CALCULATION METHOD FOR ROAD TRAFFIC NOISE BY BOUNDARY ELEMENT METHOD ALONG ELEVATED TRACKS

• NISHIYAMA Hitoshi

  JAPAN SOCIETY OF CIVIL ENGINEERS

• OGAWA Tetsuya

  富士技研センター株式会社

• NISHIYAMA Fumio

  富士技研センター株式会社

• MURASAKA Munenobu

  JAPAN SOCIETY OF CIVIL ENGINEERS

Bibliographic Information

Other Title

• 境界要素法による2層道路構造の騒音予測計算法の研究
• キョウカイ ヨウソホウ ニ ヨル 2ソウ ドウロ コウゾウ ノ ソウオン ヨソク ケイサンホウ ノ ケンキュウ

Abstract

In this paper, a calculation method of the road traffic noise along elevated tracks for L_A50 and L_Aeq using boundary element method (BEM) is presented. We have already proposed other numerical calculation method using Monte Carlo simulation (MCS). The MCS is very suitable to calculate the values of L_A50 and L_Aeq, because it can be easily simulate the direct transmission of the multi-reflection waves. However, the MCS is based on geometrical acoustics, and is difficult to compute the diffracted transmission of multi-reflection waves. Therefore, when the space between bottom of the girder under elevated road and top of the noise barrier on plane road is small. the numerical enors of L_A50 and L_Aeq computed using the MCS increase. Overcoming this difficulty, the BEM based on wave equations is applied to the calculation method of the road traffic noise.

Journal

• Doboku Gakkai Ronbunshu

  Doboku Gakkai Ronbunshu 2000 (644), 123-133, 2000-03-20

  Japan Society of Civil Engineers

Keywords

• boundary element method (BEM)
• road traffic noise
• elevated tracks
• multi reflection
• reflective noise
• Monte Carlo simulation

Details

• CRID: 1390282680285320576
• NII Article ID: 10004542618
• NII Book ID: AN10014020
• DOI: 10.2208/jscej.2000.644_123
• ISSN: 18827187
• ISSN: 02897806
• NDL BIB ID: 5334809
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I5334809
• Web Site: https://www.jstage.jst.go.jp/article/jscej1984/2000/644/2000_644_123/_pdf
• Data Source:
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  • CiNii Articles
• Abstract License Flag: Disallowed