振動インテンシティ計測に関する基礎研究 : 第4報, 二次元の詳細検討

概要

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Structural intensity of the 2-dimensional vibrational field is investigated theoretically. It is shown that the intensity has a mean component which is independent of the coordinate and a local component dependent on the coordinate. The measurement of 2-dimensional intensity is far more difficult than that of 1-dimensional intensity because many sensors are necessary. The relationship between the vibratory displacement and intensity is also discussed. The sensitivity of the structural intensity measurement is shown by the precision of vibratory displacement. Small error near the boundary may cause a big difference in intensity. The 5-point method is thought to be optimal for actual applications. A wave decomposition method in a 2-demensional vibrational field is newly introduced, which can separate the total displacement into flexural waves and evanescence waves.
社団法人日本機械学会の論文
1996-02-25