Choice of optimum extinguishers parameters for a dissipative mechanical system

Mirsaidov, Mirziyod; Теshaev, Мuhsin; Ablokulov, Sh.Z.; Rayimov, D. G.

doi:10.1088/1757-899x/883/1/012100

Cited by 14 publications

(7 citation statements)

References 11 publications

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“…When determining the dynamic response of hereditarily deformable systems to the pressure of atmospheric turbulence near critical states (divergence, flutter), we consider this pressure as a random function of our arguments [15]. Assuming that the dependence between stresses and strains for the material of the structure is linearly hereditary, and the forces of aerodynamic action from the side of the gas flow, the streamlined shell structure, are written according to the linearized piston theory [16], we obtain, to describe the forced oscillations of the system (making the usual technical assumptions of thin shell structures) the following operator stochastic integro-differential equation (IDE) [17] It is required to find solutions to IDE (1) for random perturbations of atmospheric turbulence near critical states (divergence, flutter) under given boundary and initial conditions.…”

Section: Objects and Methods Of Researchmentioning

confidence: 99%

Forced vibrations of hereditary deformable shell elements of aircraft structures in gas flow under influence of atmospheric turbulence

Usmonov,

Safarov,

Teshaev

et al. 2023

E3S Web of Conf.

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The problem of vibrations of thin, hereditarily deformable shell elements moving in a gas under the action of atmospheric turbulence is considered. The work aims to study the flutter phenomenon of aircraft elements in a gas flow under the action of loads caused by atmospheric turbulence. Assuming that the relationship between stresses and strains for the shell material is linear-hereditary, a thin shell is used, which obeys the Kirchhoff-Love hypothesis. The aerodynamic force is written according to the linearized piston theory. A system of nonlinear integro-differential equations in partial derivatives is obtained to describe nonlinear oscillations of a thin isotropic viscoelastic shell. The system of nonlinear integro-differential equations is solved numerically by the method proposed by F. Badalov, which is based on the Bubnov-Galerkin methods, finite differences, and power series. When using an exponential kernel, the flutter rate increases to approximately 1.5%. Therefore, when using an exponential kernel, the flutter velocity of a viscoelastic shell practically coincides with the critical flutter velocity for ideally elastic plates. It was also found that the critical flutter velocity increases with an increase in the number of pinched sides of the shell.

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Section: Objects and Methods Of Researchmentioning

confidence: 99%

Forced vibrations of hereditary deformable shell elements of aircraft structures in gas flow under influence of atmospheric turbulence

Usmonov,

Safarov,

Teshaev

et al. 2023

E3S Web of Conf.

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“…In the calculations, the following is accepted An analysis of the graphs shows that the time spent by the lock on the surface of the fire bar also increases with an increase in the contact surface of the fire bar with a lock. This can create the possibility of separating more contaminants from the lock [4][5][6][7]. In order to determine the number of pollutants emitted from a lock of wool moving along the surface of the fire bar, we will use the model proposed by A.G. Sevostyanov.…”

Section: Usingmentioning

confidence: 99%

Improvement of the machine for wool scutching for obtaining ecologically clean fiber

Ismoyilov,

Kuldashev,

Abrorov

et al. 2023

E3S Web of Conf.

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The article covers natural wastes emitted from wool in the loosening process. The results of experimental research of the amount of ecologically clean fiber are shown. Analytical research of scientific and technical information about technologies and technical means of primary processing of wool, as well as previous research in this area has been carried out. Improvement of the technological parameters of machines for loosening wool by adapting them to the characteristics of local wool has been studied. The dependence of the separation of contaminants from the composition of wool on the design of the fire bar of the fire grate of the column structure and the density of the product in the working chamber has been determined. Based on the results obtained, it has been determined that the use of an improved wool loosener improved cleaning efficiency. It has been determined that during the testing process, an experimental sample showed high performance. It was determined that after the peg drums, the porosity of the wool doubled, and the density of the wool decreased by half. The development of a new design of a loosening machine for loosening and cleaning wool fibers has been shown in technological schemes.

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“…There are various types of energy-efficient glass: I-glass, K-glass, energy-saving, heat-saving, heatreflecting, heat-absorbing, etc. [12].…”

Section: Introductionmentioning

confidence: 99%

Improvement of the method of calculation of the reduced heat transfer resistance of light openings of buildings

Komilov,

Akhrorova

2023

J. Phys.: Conf. Ser.

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During the construction of buildings in regions with relatively low outdoor temperatures it is necessary to pay more attention to the issues of heat preservation and minimizing heat losses through external enclosing structures. The paper analyzes the main ways of heat loss minimization through translucent enclosing structures. It is revealed that it is more expedient to reduce heat loss through a window structure by using an effective double-glazed window. The main methods of increasing the reduced resistance to heat transfer of a double-glazed window are described. The methods of reducing heat transfer which occurs due to convection and radiation are analyzed. The reasons for the need for the use of energy-efficient double-glazed windows are given.

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Choice of optimum extinguishers parameters for a dissipative mechanical system

Cited by 14 publications

References 11 publications

Forced vibrations of hereditary deformable shell elements of aircraft structures in gas flow under influence of atmospheric turbulence

Forced vibrations of hereditary deformable shell elements of aircraft structures in gas flow under influence of atmospheric turbulence

Improvement of the machine for wool scutching for obtaining ecologically clean fiber

Improvement of the method of calculation of the reduced heat transfer resistance of light openings of buildings

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