Abstract
This paper discusses a new method for structural intensity measurement based on the modal expansion of structural intensity for flexural vibration on beams. The intensity field indicates the magnitude and the direction of vibratory energy flows at any point in a structure. The sensor array which is composed of two or four accelerometers is often used to measure the intensity vector at any point. On the other hand, we had proposed the modal expansion of intensity. The expansion can be used to estimate the intensity field from the modal properties evaluated by the experimental modal analysis. In this paper, we propose a new measurement method for intensity on beam and discuss the detail condition of the method. Then the numerical and experimental demonstrations are carried out to show the usefulness of the proposed method.
