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- W2107492765 abstract "The coupling loss factors frequently used in Statistical Energy Analysis are frequently based on a wave approach that assumes that the transmitted waves returning to the junction are uncorrelated with the directly transmitted waves. This assumption is generally not fulfilled for structures at low frequencies where the response exhibits distinctly well separated resonances. A method is presented here for calculation of an improved coupling loss factor for one-dimensional subsystems. By applying statistical considerations to an analytical expression of the net power transmission it is possible numerically to calculate an average value of the ratio of reflected to incident wave amplitude at the junction. From this ratio an improved coupling loss factor can be calculated which takes into account the re-radiation and re-injection of power which normally occurs between two reverberant fields. This improved coupling loss factor has the following features: it is valid at low modal overlap, it is independent of the exact boundary conditions, it depends upon the loss factor of the receiving subsystem, and its calculation is not dependent on the strength of the coupling. To illustrate the method, a specific beam system is considered in the frequency range where the modal overlap is small. Coupling loss factors are calculated and are employed in a traditional SEA model to predict mean square velocities for each beam element with good accuracy." @default.
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- W2107492765 date "1998-05-01" @default.
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- W2107492765 title "POWER TRANSMISSION BETWEEN TWO FINITE BEAMS AT LOW MODAL OVERLAP" @default.
- W2107492765 doi "https://doi.org/10.1006/jsvi.1997.1472" @default.
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