Environmental impact consideration in the measures to improve the builders of different specialties working conditions

The sequence of development of a model for analyzing the undisturbed state of a thermal power hydraulic system - a heat supply system, which is an important stage in the design and optimization of the system, is considered. The main parameters of the system are analyzed, such as thermal loads, heat flows, heat transfer through pipes and heat exchangers, location and characteristics of equipment (boilers, pumps, etc.). A mathematical model of the system has been developed, which should take into account all the main factors affecting heat transfer and the efficiency of the system. The model is presented in the form of a system of equations and includes parameters such as temperature, pressure, coolant flow, etc. Based on this model, it is possible to analyze various operating modes of the system, optimize parameters and make decisions to improve it. When developing the model, the possibility of various disturbances was taken into account. To analyze the unperturbed state of the system, the influence of such disturbances is excluded and its basic operation is considered. When developing a flow distribution analysis model for a heat and power system, energy equivalence was used. The developed model for analyzing the undisturbed state of a thermal power system will make it possible to more accurately design and control such a hydraulic system, improve its efficiency and reliability.

Development of a mathematical model for the analysis of the undisturbed state of a thermal power hydraulic system

Sazonova,

Korablin,

Akamsina

2023

Modeling of processes in bent beams with dispersed reinforcement under alternating influences

Nikolenko,

Sazonova

2023

The results of studies of the effect of dispersed reinforcement on the behavior of structures under static load of one sign or alternating static load under reinforcement with relatively long fibers are considered. The developed mathematical models and methods of experimental investigation of the behavior of beam elements with dispersed and combined reinforcement under alternating static effects, based on mathematical planning using a specially manufactured frame, are presented. The behavior of fibro-reinforced concrete and reinforced concrete beam elements under similar influences is compared. The results of experimental studies of cubes and prisms for static and compression are considered. The presented results of experimental studies allow us to conclude about the influence of dispersed reinforcement with relatively short fibers on the behavior of beam structures under alternating low-cycle static effects and the feasibility of combined reinforcement of structures operating under such influences. The results of the full-scale experiment are compared with the results of numerical modeling of processes in the studied structural elements. It is revealed that the use of dispersed reinforcement with relatively short fibers in combined reinforced beam structures operating under alternating influences will increase the crack resistance, and with a certain percentage of reinforcement, the strength of such structures. At the same time, the use of relatively short fibers will significantly reduce the complexity of manufacturing such structures.

Mathematical modeling of flow distribution of the perturbed state of a thermal power system

Sazonova,

Kochegarov,

Logachev

2023

The results of the development of a model for the analysis of the disturbed state of a thermal power hydraulic system on the example of a heat supply system are presented. The parameters of the operating mode of the thermal power hydraulic system after the influence of disturbing factors on it were evaluated. It is shown that the classification of stationary states of the studied fragment of the system with steady flow distribution is oriented to boundary conditions. The boundary conditions classified into four types are considered. It is noted that the choice of boundary conditions must be carried out taking into account the use of energy equivalence in the analysis of the perturbed state of the studied fragment of the hydraulic system. The developed model of steady-state flow distribution with a non-isothermal flow of a viscous medium is presented. It is concluded that the developed mathematical model represents a qualitatively new approach to formalizing the problems of flow distribution analysis in systems with adjustable parameters. The model can be considered as a generalized form of representation of particular flow distribution models when describing the object under study, which can be considered as a hydraulic circuit with adjustable parameters with a non-isothermal flow of a viscous medium. It is shown that this model can be used to analyze and describe the flows and properties of a viscous medium in such systems where it is possible to regulate the parameters, and non-isothermal flow is taken into account.