Determination of the stress-strain state of models of steel cylindrical tanks using the “ANSYS” program

The article discusses the use of the finite difference method of one variable, the method of straight lines, to determine temperature stresses and strains in plates with a fixed, hinged supported or completely free contour. This method was developed by L.V. Kantorovich, the finite difference method for solving in one variable, i.e. solving the Laplace and Pousson equations. Later, this method was improved by V.A. Fadeev, L.P. Vinokurov and M.G. Slobodyansky, and in the middle of the last 20th century by P.M. Varvak. The Kirchhoff-Love hypothesis is used. It is assumed that the cross section of the plate that is flat and normal to the median plane does not distort and after deformation remains flat and normal to the median plane, the displacement of points located in the median plane of the plate is considered very small compared to the thickness. A nonstationary problem has been solved in which the temperature distribution over the thickness of the plate – h for the singularity is assumed to be nonlinear. Temperature deflections and stresses along the middle of rectangular plates with embedded, supported or completely free boundary conditions on the contour were obtained.

Determination of thermal stress and strain in plates by the direct method

Khamzaev,

Umarov,

Khaidarova

et al. 2024

On the theoretical study of the phenomena of electromagnetism with variable core parameters

Yusupova,

Aliyev,

Kholmatov

et al. 2024

In this study, a method was considered for analyzing the phenomena of interaction of an electromagnet with various objects, provided that the dimensions of its ferromagnetic core are introduced as a variable. The analysis was performed by using Maxwell’s equations with the solution of a differential equation of the first degree in multiple variables with respect to the electric field, taking into account the Nabble vector operator. As a result of the study, the resulting function was obtained, previously dependent on the vector of magnetic induction and, in particular, on inductance, as a result, dependent on multiple variables and direct indicators of the electromagnet, its position and the probe object in space. And also, the conclusion is given, the dependence between the magnitude of the interaction force and the variable dimensions of the core is established.

Analyzing influential factors on healthcare expenditures

Jakhongirov,

Mahmudov,

Abdurakhmanova

et al. 2024

This study used an Autoregressive Distributed Lag (ARDL) model to examine the influence of inpatient and outpatient service expenditures on total healthcare expenses from 2000 to 2021. The ARDL model, renowned for its capacity to handle variables with distinct levels of integration and identify cointegration connections, is employed to examine both the immediate and prolonged dynamics of healthcare expenditure. The research demonstrates that expenditures on hospital services have a substantial and beneficial impact on overall healthcare expenses, but the impacts of expenditures on outpatient services are more complex and varied. The results indicate that hospital expenses play a significant role in healthcare expenditure, which is essential information for policymakers who are concerned with controlling costs and allocating resources efficiently in the healthcare industry. The study presents a novel method for controlling outpatient spending that has the potential to reduce the increasing costs in the healthcare industry.