抄録
The previous study derived the modal expansion of structural intensity for flexural vibration on a beam. Structural intensity is expressed by the superposition of modal terms composed of weight coefficients and cross-modal functions. As increasing the weight coefficient, the cross-modal function can be strongly or weakly exciting. The cross-modal functions are determined by the natural modes and the weight coefficients are determined by the natural frequencies, natural modes and the excitation point. Thus, the weight coefficients can be increased or decreased by the changing excitation condition. In this paper, firstly the modal expansion of structural intensity for flexural vibration on flat plates is newly derived. Next, based on the modal expansion, we propose a method to determine the excitation condition for the realization of structure intensity distribution desired. The application results on the flat panel and the compound plate structure indicate the validity of the method.
