Using SEA to Analyze Internal or External Noise of Buildings Including Structure-Borne Sound (An Idea for Nonreflecting Boundary Model)

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  • 固体音を考慮した屋内外騒音のＳＥＡによる解析法（無反射境界モデルの一提案）
  • コタイオン オ コウリョ シタ オクナイ ガイ ソウオン ノ SEA ニ ヨル カイセキホウ ムハンシャ キョウカイ モデル ノ イチ テイアン

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Abstract

A method to analyze internal or external noise of building, including structure-borne sound, is proposed based on statistical energy analysis (SEA). In particular, an analysis model for simulating a nonreflecting boundary condition in air is discussed. The theory of viscous boundary model of semi-infinite soil in seismic analysis was used for this method. Longitudinal waves in air are absorbed by dash-pots which are located at a boundary. The viscous coefficient of a dash-pot is correlated with the internal loss factor η of the SEA subsystem. The relationship between η and the absorption constant α of the SEA element for simulating a nonreflecting boundary condition was examined, and an equation between η and α was derived, which differs slightly from Lyon's equation. A new η-α equation is applied to the absorbing SEA element at a nonreflecting boundary.

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