多孔板を含む音場の数値解析法に関する研究（第３報：多孔板の音響連成振動と非線形吸音特性を考慮する場合）

抄録

Numerical analysis technique for three dimensional sound fields including perforated plates vibrated by sound pressure and mechanical force is proposed. The technique is an acoust - structural coupled analysis technique which is based on boundary element method for sound fields and finite element method for perforated plates. To verify validity of the numerical analysis method, the sound field in the acoustic tube with thin aluminum perforated plate was analyzed by the method, and the computed result was compared with experimental result. The sound absorption coefficient of the perforated plate computed by the present method proved to be good agreement with experimental results. We found that the accuracy of the proposed method is enough and the method is useful for designing sound absorption structure using perforated plates.