Engineering mechanics - Вестник НИА РК

Mathematical model of the stress-strain state of a rod with an inhomogeneous layered structure

УДК: 621.833.2

Authors: S. M. Akhmetov, M. T. Userbayev, Zh. U. Iklasova, A. B. Bolatova

The stress-strain state (SSS) of a rod with an inhomogeneous layered structure is considered. On the basis of a brief review and analysis of the current state of research of rod systems, the relevance of the study of the SSS of layered-heterogeneous wooden structures is substantiated, taking into account

Formalization of the problem of analysis of stationary modes of complex heat supply systems

УДК 004.3:621.4

Authors: M. Iskakov, A. N. Tomilov

On the basis of a systematic approach, the goals and functional tasks of the analysis of the steadystate hydraulic regime are formalized, as a proven practice of the methodology of decision-making in the field of commissioning and prospective development of complex heat supply systems of megacities. The use of

The effect of the initial size on the height of the crank press die

УДК 621.979.134

Authors: A. K.tuleshov, G. Ya. Panovko, B. I. Akhmetov

The expansion of the technical and technological capabilities of forging and stamping machines and equipment can be carried out through the introduction of new designs of actuators with wide functionality. These developments require solving the problems of kinematic synthesis and analysis of mechanisms. In this work a comparative analysis

Automation of optimal design of drilling rig transmission

УДК: 621.833.2

Authors: S. M. Akhmetov, M. Userbayev, N. M. Akhmetov, Zh. U. Iklasova, Zh. K. Zaidemova

Algorithms and subroutines for optimal design of the transmission of drilling rig winches are proposed. In order to develop a joint program for determining the parameters of the lifting complex of the drilling rig, a block diagram was created to build the characteristics of the lifting complex and determine

Results of experimental studies of the design of an external fence with a heat-accumulating layer

МРНТИ 67.15.55; 67.15.49

Authors: Zh. Aldyarov, N. Zhangabay, A. Zhalgasov

The results of experimental studies of the fence design solution, in which a panel with a heataccumulating material is used to increase the heat capacity, are presented. Experimental studies were conducted on a fragment of a wall fence with an energy-active panel with a layer of thermal storage material

Continuum mechanics: applications in bone remodeling and bone resorption models

UDC 631.362.36:57.087.3

Authors: Gholamreza Rouhi

A brief description of continuum mechanics is given, first. Then, a general introduction on biomechanics is presented, along with some salient features of it, which should be kept in mind when one is working in this field. The manuscript will continue with an introduction on bone remodelling process, then

Investigation of the whirlpower mini-hydroelectric power station using the CFD module in the COMSOL Multiphysics environment

UDC 620.91

Authors: D. E. Turalina, А. М. Аrshabekova

This article deals with the study of small HPP equipment (Hydroelectric Station) for water channels after large dams and energy-deficient areas, in particular, the study of the whirlpool mini hydropower plant using the CFD module in the COMSOL Multiphysics environment. The main reason for studying this device is the

Vibration of turbine engines with criterion for qualitative rotor collection and their technical condition

ГРНТИ 73.37.41

Authors: K. Aldamzharov, K. Koshekov, I. Pirmanov

This article discusses the problem of vibration of aircraft turbine engines, given the imbalance of the rotor stages. It is shown that the amount of information contained in the data obtained by constant measurements of the amplitudes and frequencies of the transverse vibration of the motors, especially in the

Decline in air transport sector performance as a result of COVID-19 pandemic outbreak

УДК 519.8, 629.73

Authors: N. A. Dolzhenko

Tackling the crisis is nothing new for airlines and the aviation and tourism sector in general. Just as the industry has overcome past epidemics, economic downturns, annoying security breaches and other debilitating events, it will also overcome the COVID-19 crisis. Actions taken by the government, industry leaders and individual

Equivalent radio engineering schemes of systems based on polyelectrolyte hydrogels and their practical use

УДК 53.082; 541.64

Authors: Г. А. Мун, З. М. Егембердиева, Э. К. Темырканова, С. В. Коньшин, А. Ж. Аликулов, Kinam Park

It is theoretically predicted that when a solution of a low-molecular salt flows through a polyelectrolyte grid, electromotive forces can occur, the sign of which depends on the sign of the grid charge. This phenomenon can be used in the development of new desalination systems, but its further study

Identification method for assessing the state vibration strength of the aircraft engine

ГРНТИ 73.37.81

Authors: K. B. Aldamzharov, K. T. Koshekov, I. A. Pirmanov, R. K. Anayatova

A method foraircraft engine state assessment is described, based on the theory of identification measurements and consisting in the analysis of the regularity properties of the temporal and correlation functions of the vibration signal. An example of an aircraft engine dynamics analysis during flight tests is considered. Four classes

Synthesis of LQG regulator for intelligent control of the technological process of fine grinding

УДК 681.5.013

Authors: S. К. Atanov, А. Z. Bigaliyeva

The article presents the development of a linear-quadratic Gaussian controller (LQG) for intelligent control of the fine grinding technological process. The LQG regulator was designed to control the quality of mill output. The developed LQG controller takes into account external disturbances (process noise) and noise in measurements modeled as

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