The Energy Flow Analysis (EFA) is used in the mid frequency range in order to predict the vibroacoustic behavior of structures. In the EFA, the results of the Finite Element Method (FEM) are used for the calculation of the Energy Influence Coefficients (EIC), which provide information about the specific energy content of the different subsystems of the structure. Conventionally, linear or quadratic shape functions (h-FEM) are used for the FE analysis. Because of its relatively low convergence rates, the use of h-FEM can lead to a high computational effort. Therefore, in this thesis, the use of hierarchic high order shape functions (p-FEM) within the framework of EFA is investigated. To this end, an interface between the high order FE software AdhoC of the Chair for Computation in Engineering and the EFA program of the Chair of Structural Mechanics at the Technical University of Munich was created and verified. Moreover, the calculation time and accuracy that result from p-FEM are compared with those resulting from h-FEM.
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The Energy Flow Analysis (EFA) is used in the mid frequency range in order to predict the vibroacoustic behavior of structures. In the EFA, the results of the Finite Element Method (FEM) are used for the calculation of the Energy Influence Coefficients (EIC), which provide information about the specific energy content of the different subsystems of the structure. Conventionally, linear or quadratic shape functions (h-FEM) are used for the FE analysis. Because of its relatively low convergence ra...
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