G1000-5-4 薄肉平板上の静粛領域生成時における音響放射パワーの評価(機械力学・計測制御部門一般講演(5):音響・波動,社会変革を技術で廻す機械工学)

概要

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This study addresses validity of generating a vibration-free state in the designated area of a target plate for sound power reduction. The sound occurs from vibration on structure, hence, sufficient attenuation of acoustic power is assumed to be achieved by producing vibration-free state in the structure. In this study, the progressive wave control is employed to produce almost vibration-free state where some sound reduction can be expected. First, considering a simply supported, thin, lossless, steel rectangular plate, the solution of wave element is derived and sound power emitting from a target structure into free space in the case is defined. Next, the methodology of blocking the progressive wave is proposed. Then, finally, numerical simulation is conducted to confirm the produced quiet zone on the plate using the wave control method and to clarify the performance for suppression of the sound power.
一般社団法人日本機械学会の論文
2010-09-04