抄録
This paper discusses a new method for SI measurement based on the modal expansion of structural intensity for flexural vibration on beams. Structural intensity is an effective tool to analyze the structural vibration, but has not been put to practical use due to its intrinsic complexity of finite difference error and measuring error. Some numerical simulations are made to reveal the characteristics of structural intensity using modal expansion. Additionally, measuring method using least square method is proposed to reduce the influence of these errors. As a result, it is shown that the measuring method is applicable and the results are effective to analyze the flexural vibration.
