振動インテンシティ計測に関する基礎研究 : 第3報, 種々の方法の検討

抄録

It will be very useful for structure-borne sound problems, if energy flow of a mechanical structure can be measured. This paper, following the previous report, describes the experimental investigation of structural intensity measurement on a beam by several methods and approaches. The 2-point, 3-point and 4-point methods using an array of closely spaced accelerometers and strain gauges were compared. The results show that the 3-point method using acc, is most successful in structural measurement at the near-field. Another approach by a newly proposed reference method is also shown to be good in practical use if the vibration field is stationary. Experimental wave decomposition makes it possible to gain information of the vibration field, especially the termination condition.