Bercin, AN2020-06-252020-06-251996closedAccess0022-460Xhttps://doi.org/10.1006/jsvi.1996.0149https://hdl.handle.net/20.500.12587/2771The majority of the studies of energy transmission in plate-type structures are based on the assumption that the main component of the energy transfer is due to flexural waves, and the contribution of in-plane waves may be neglected. In this study a systematic assessment of the effects and importance of in-plane vibrations has been made by using the dynamic stiffness technique which yields ''exact'' results for a certain class of structures. The method is also used as a ''bench-mark'' to assess the predictions of the statistical energy analysis (S.E.A.) approach and the wave intensity analysis (W.I.A.) approach. It is shown that the exclusion of in-plane modes may lead to sizeable errors in energy predictions unless the structure is very simple. (C) 1996 Academic Press Limitedeninfo:eu-repo/semantics/closedAccessArticle191566168010.1006/jsvi.1996.01492-s2.0-0030129513Q1WOS:A1996UF42000003N/A