Structural Mechanics of Engineering Constructions and BuildingsStructural Mechanics of Engineering Constructions and Buildings1815-52352587-8700Peoples’ Friendship University of Russia named after Patrice Lumumba (RUDN University)10906Research ArticleEXPERIMENTAL STUDY OF NATURAL FREQUENCIES OF THREE-LAYERED HONEYCOMB PANELS WITH HOLES AND REPAIR SLEEVESSafronovV Sv.s.safronov@mail.ruMoskovskiy aviatsionniy institute (GTU)150420144697312092016Copyright © 2016, Structural Mechanics of Engineering Constructions and Buildings2016He paper presents a methodology and experimental research results of an experiment to determine the frequencies of the natural flexural vibrations of flat sandwich panels with cut inserts and repair various structuressandwich panelsbending frequencyexperimentcutoutrepair insertтрехслойная панельчастоты изгибных колебанийэкспе- риментвырезремонтные вставки