2407 線路構造物に対するブロック分割による境界要素非定常騒音解析プログラムの開発(CO1-2 解析コンテスト)

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  • 2407 A boundary element transient Acoustic Analysis Program using block subdivision for railway structure

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In this paper, an efficient numerical method for the transient boundary element acoustic analysis of the railway structure is given. A railway structure is modeled with the same structure block connected repeatedly in the rail direction. For a block structure the transfer matrix C(ω) at frequency co from the nodal velocity vector to acoustic pressure vector on the boundary surface is obtained by using BEM. The approximated time response of acoustic pressure at arbitrary points around the structure to the vibration of the railway structure is effectively obtained from the transfer matrix. Numerical examples are demonstrated.

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