Open AccessVerification of a design model and evaluation of a technique of manufacturing aircraft engine composite parts on the basis of dynamic tests
Author(s) -
A. V. Zinin,
A. V. Zinin,
Alexander Arkhipov,
Alexander Arkhipov,
Д. П. Холобцев,
Д. П. Холобцев,
Yu. A. Ravikovich,
Ю. А. Равикович,
A. O. Shevjakov,
А О Шевяков,
M. A. Kholmanova,
M. A. Kholmanova
Publication year - 2019
Publication title -
vestnik samarskogo universiteta. aèrokosmičeskaâ tehnika, tehnologii i mašinostroenie
Language(s) - English
Resource type - Journals
eISSN - 2541-7533
pISSN - 2542-0453
DOI - 10.18287/2541-7533-2019-18-4-52-63
Subject(s) - finite element method , vibration , natural frequency , composite number , kinematics , mechanical engineering , structural engineering , dynamic testing , basis (linear algebra) , engineering , acoustics , materials science , composite material , physics , geometry , mathematics , classical mechanics
The results of finite element modeling and experimental evaluation of dynamic characteristics (vibration modes and frequencies) of the composite element of aircraft power plant structures are presented. The aim of the work is to develop effective design and technological schemes for thin-walled complex-geometry composite parts, taking into account the peculiarities of mechanical behavior of polymer composite materials to the fullest extent possible. A method for determining the parameters of natural oscillations of composite parts in a free state using a ping test is developed, which allows excluding the influence of kinematic boundary conditions and obtaining frequency characteristics that depend only on the local characteristics of the material which are primarily determined by the manufacturing technology. According to the results of measurements of the amplitude-frequency parameters of the dynamic response, spectrograms of damped oscillations are obtained the peak values of which correspond to the experimental evaluation of the natural frequencies of the composite part. Verification of the design model was carried out according to the results of the ping test and a method for assessing the quality of technological processes of manufacturing thin-walled carbon fiber structures was proposed.