Dzyubenko O. Investigations of dynamic characteristics of рlate-and-beem structures with damping layers

The dissertation is devoted to the problem of free and forced vibrations of plate-and-beam aircraft structures carrying a radio electronic equipment, in view of their distinctive features. A finite element model of a structure is elaborated, in which a dissipation of energy by damping layers (coatings) is described and external loads from movable supports are taken into account. An algorithm for solving the problem of free and forced vibrations of plate-and-beam structures is created. A program system for calculation of a dynamic state of plate-and-beam structures based on the elaborated algorithm is developed. The program system is the completed software product, which may serve as a practical tool for computer dynamic analysis of plate-and-beam structures. An efficiency of the elaborated models of energy dissipation properties and external load description is confirmed. The effect of damping coatings parameters and various types of external loads on dynamic properties of the structures are determi ned. The results of the present work have found an industrial application in calculations and numerical investigation of aircraft constructions at the design stage.