内部減衰を考慮した平板の振動モード解析と音響放射パワー推定への応用 : 第2報,モード全損失係数の推定および音響放射パワー推定への応用

概要

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The equations for estimating modal total loss factor were determined for S45C steel, SUS 304 stainless steel, spheroidal graphite cast iron, brass and A2017B alminum, based on their experimental modal total loss factors which were measured using experimental modal analysis of a circular plate with a center hole and a circular plate with a solid shaft. The frequency responses of total loss factors of the five materials were then calculated by estimating the modal total loss factors based on the equations. The radiated sound powers of circular plates were estimated using the frequency responses obtained. Consequently, the radiated sound power estimated using the estimated modal total loss factors compared well with the radiated sound power estimated using the experimental modal total loss factor. The equation for estimating total loss factor, which was derived in a previous paper, is hence effective for estimating radiated sound power.
1994-01-25