Abstract:

Energy flow analysis methods have been developed to predict the approximate response of built-up structural-acoustic systems at high frequency. The governing equations of energy flow analysis can be formulated into a finite-element approximation, referred to as the energy finite-element method. In recent investigations, a method has been developed to calculate the power input for energy flow analysis of systems with random, distributed loads. The method uses cross spectra pressure information. The method is intended to allow energy flow analysis and energy finite-element analysis of flow excited panels. Both analytical and experimental verification studies have been done to test the approach for panels excited with distributed pressure loads. The predicted results are excellent approximations of the response.