DOI: 10.5937/jaes0-28208
This is an open access article distributed under the CC BY 4.0
Volume 18 article 755 pages: 745 - 749
During the operation of a solid-propellant rocket engine, the combustion products of a powder charge create increased
pressure in the combustion chamber. Besides, the combustion of gunpowder is accompanied by a large
release of heat, which, despite the thermal insulation, causes the appearance of deformations in the engine cowling.
This leads to the need to investigate the durability of the shell under the influence of internal pressure and temperature
fields. The aim of the paper is to determine the complex dynamic deformed state and vibrations of the engine
cowling under the action of force and temperature loads. The problem of a complex axisymmetric stress-strain state
and vibrations of a thin cylindrical shell with a dynamically breaking internal elastic foundation, obeying Winkler’s hypothesis,
is approximately solved. The shell is under the action of internal pressure and temperature fields on a part
of its length free from an elastic base. The resolving equation of the problem of the shell deflection is solved by the
Bubnov-Galerkin method, reducing the problem to a system of linear algebraic equations. The examples are considered,
in which the basic frequencies of natural vibrations of the structure are determined depending on the conditions
of shell fastening. Parametric studies are carried out.
The work was carried out with the financial support of the
state project of the Ministry of Education and Science
project code FSFF-2020-0017.
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