Developed Computer Program Research Articles

Pressure Vessels Structural Integrity Assessment Using Failure Analysis Diagrams

There is much discussion today about the possibility of extending the lifetime of industrial plant components due to economic factors. Pressure vessels are among the most expensive components, and their replacement can significantly impact the operation of an entire plant. In this context, several Fitness-for-Service (FFS) methodologies can be applied to assess structural integrity, addressing not only economic aspects but also enhancing safety. Failure Assessment Diagrams (FADs) are widely used in FFS methodologies to prevent future failures by analyzing crack-type defects. These diagrams establish acceptability criteria based on the material toughness ratio and loading ratio. Recommended practices utilizing the BS-7910, API-579, and R6 methodologies are addressed in this work, alongside principles from fracture mechanics, material properties, and solid mechanics. The main objective was to develop computer programs in Matlab to analyze a case study involving a pressure vessel manufactured from SA-516 Gr 70 steel, determining the critical dimensions of semi-elliptical cracks in longitudinal and circumferential orientations of a cylindrical section. Level 2 evaluation, the most commonly used in FFS methodologies, was applied to develop the programs. This study enabled the creation of tools to automate calculations and generate FAD graphs, considering the critical depth and length of cracks. These tools support decision-making in structural design requirements and provide a means of evaluating equipment in service with crack-type defects, extending its operational lifetime. The FFS methodologies studied are based on ASME Codes for pressure vessels and piping, particularly Sections III and XI. Based on the analysis of API-579, BS-7910, and R6 methodologies under the operating conditions of the case study, it is possible to conclude that, for normal evaluations, critical length (2c) = 40.64 mm and critical depth (a) = 10.16 mm are acceptable values. However, for evaluations requiring safety considerations under the R6 procedure, applicable to Class A service equipment in the nuclear sector, only critical length (l) = 5 mm and depth (a) = 2.5 mm are permissible values.

Development of a Novel GUI-Based Computer Program for Predicting the Temperature Distribution in the Concrete Compartment and Member

Development of a Novel GUI-Based Computer Program for Predicting the Temperature Distribution in the Concrete Compartment and Member

Chimerism: A whole new perspective in gene regulation.

The diversity of molecular entities emerging from a single gene are recognized. Several studies have thus established the cellular role(s) of transcript variants and protein isoforms. A step ahead in challenging the central dogma towards expanding molecular diversity is the identification of fusion genes, chimeric transcripts and chimeric proteins that harbor sequences from more than one gene. The mechanisms for generation of chimeras largely follow similar patterns across all levels of gene regulation but also have interdependence and mutual exclusivity. Whole genome and RNA-seq technologies supported by development of computational algorithms and programs for processing datasets have increasingly enabled the identification of fusion genes and chimeric transcripts, while the discovery of chimeric proteins is as yet more subtle. Earlier thought to be associated with cellular transformation, the contribution of chimeric molecules to normal physiology is also realized and found to influence the expression of their parental genes and regulate cellular pathways. This review offers a collective and comprehensive overview of cellular chimeric entities encompassing the mechanisms involved in their generation, insights on their evolution, functions in gene regulation and their current and novel clinical applications.

COMPUTER PROGRAM FOR MODELLING RAINFALL INTENSITY DURATION FREQUENCY (IDF) RELATIONSHIPS BY SHERMAN’S METHOD FOR ILORIN AREA IN NIGERIA

A computer program was developed for the modelling of rainfall data for a period of 30 years (1981-2010) for Ilorin area using a MATLAB software. The data was analyzed by sorting and ranking the maximum rainfall depths with their corresponding depths and their return periods. The rainfall depths were converted to rainfall intensities. An algorithm was developed in form of a flowchart which guided the development of computer program using Sherman’s method. Values of rainfall intensities with corresponding durations and return periods were exported to the MATLAB program for modelling of station constants and simulation of IDF curves for Ilorin area. The station constants were obtained as n = 0.5707, c = 131.0144, and m = 0.3425 for Ilorin area respectively. These were used to produce IDF curves and mathematical model for Ilorin area.

Computer-Integrated Surface Image Processing of Hydrogen-Saturated Steel Wear Products

This paper briefly describes the conceptual direction of the application of computer vision (CV) methods that involve controlling the morphology of hydrogenated wear particles (WPs). During long-term operation, in the surface and subsurface layers of the materials of parts in the tribo-joint, changes in the micromechanisms of fracture occur, which change the morphology of WPs. It has been shown that the developed computer program (CP) can be used to monitor the fractography of the surface of wear particles, and, accordingly, it is possible to control changes in the surface morphology. Therefore, it is possible to predict the operational stability and durability of the tribo-joint. A conceptual scheme for determining the performance of a tribotechnical assembly depending on the determined parameters of WPs is presented. The modes marked on it, including normal operation, transient, run-in, and catastrophic failure, can be evaluated by robotics approaches.

The Contribution of Artificial Intelligence Technologies in Refining the Arabic Language Skills of Its Native Speakers: Achieved and Possible

This study aims to shed light on the applications of Artificial Intelligence (AI) in improving Arabic language skills for speakers. It involves digitizing the language, developing computer programming, and adapting it to Arabic language learners to enhance the learning and teaching process. This study emphasizes the significance of implementing this project, as it can open up new horizons in educational curricula and teaching techniques. Moreover, it can contribute to spreading the use of the Arabic language and facilitating its acquisition, exchange, and dissemination globally, leading to positive outcomes on all levels. The current study also presents the most crucial benefits resulting from the digitization of the Arabic language, including supporting the self-learning strategy that has dominated most traditional methods. It also reinforces the status of the Arabic language in cognitive and scientific systems, blogs, and speech communication. One of the benefits is the easy acquisition and exchange of Arabic language skills, especially with the availability of various smartphone applications that have become indispensable in this era. Furthermore, the study addresses the significant challenges and difficulties facing this project and suggests appropriate solutions to overcome them. To what extent has the Arabic language benefited from this new digital transformation based on AI in the present era? And to what extent can the Arabic language rely on AI in the future so that its speakers can enhance their linguistic skills and proficiency in writing and speaking?

Improving the method of calculating the water balance of the Khan canal

Abstract In this article, the Morgunenkov (Khan) canal in the Chirchik-Ohangaron Basin Management for Irrigation Systems area was selected. This canal is one of the more important canal in Tashkent region because it supplies water to irrigation fields in the Urta Chirchik, Buka and Akkurgan districts of the region. In this paper the technical condition of the canal and its hydrotechnical facilities was studied. The received data was entered into the database of the processed program and the efficiency of the canal was determined. The program helps to quickly and easily identify defects that cause water wastage. This is the reason for increasing the hydraulic efficiency of the canal. In addition, the developed computer program allows for the correct distribution of water resources of the Morgunenkov (Khan) canal, taking into account the demand for water in the entire system, to prevent water shortages in the downstream areas of the canal. The benefit from the practical application of the program will be at the expense of improving the efficiency of water resources management.

Design, Modeling and Simulation of Mini Rocket Launching Systems Applied to the Reforestation of Areas Impacted by Deforestation

Objective: This project aims to develop reforestation operations in areas impacted by deforestation, with the objective of designing mini-rocket launch systems, computational modeling and simulation for flight prediction, promoting biodiversity and environmental recovery Theoretical framework: The use of rockets for ecological restoration purposes presents unique challenges. Precision in seed deposition, selection of the most suitable species for each environment, and assessment of environmental impacts are issues that require in-depth research. This technology, traditionally associated with space exploration, has the potential to optimize agricultural practices, monitor the environment, and address challenges such as deforestation and desertification. Method and material: The materials used in the project were a dynamometer, specifically the AMF 5 model, capable of measuring both tensile and compressive forces up to 5 N with a precision of 0.01 N, a RAVEN brand smoke generator with a smoke flow rate of 13 liters per minute, a custom-designed wind tunnel constructed in the laboratory, a CB-8909 anemometer, and custom-designed rocket launch bases. The methodology began with the design and construction of a wind tunnel to determine the drag coefficient of the miniature rockets. A launch pad for miniature rockets propelled by water and air was developed and used. The thrust of various miniature rockets was experimentally measured on a test bench while keeping the rocket stationary. Flight prediction modeling and simulation were based on two sets of differential equations derived from the conservation of mass and momentum, solved numerically using the Runge-Kutta method. Two sets of nonlinear differential equations were formulated and solved: one for the Propulsion Phase and another for oblique launch. The computer program allows user-defined input and generates various outputs in matrix or graphical format. Launch tests were conducted to validate the developed computer program. Results and Discussion: The computational simulation of the mini-rocket flight prediction resulted in figures containing the most important flight parameters. The results of the computer program were validated through field launches of the mini-rockets. The differential of this work in relation to those found in the literature was that it addressed dynamic modeling for flight prediction, using two systems of nonlinear equations with twenty-two dynamic variables, with the obtaining of results for fifteen flight parameters. Research Implications: This study found that the use of rockets in agriculture and environmental fields opens up a range of innovative possibilities for natural resource management and environmental preservation. The projects in this study revealed the importance of studying mini-rockets, wind tunnels, mini-rocket launch systems, and the development of simulation software, opening up new frontiers in the aerospace sector for reforestation, restoration of degraded areas, and applications in agriculture. Originality/Value: The project, modeling and simulation of mini-rocket launch systems applied to reforestation revealed a new application area for rockets. The research was conducted at the Integrated Engineering Laboratory of the Department of Chemical Engineering at the Federal University of São João del Rey, Ouro Branco Campus, Minas Gerais, Brazil. This project, which was supported by FAPEMIG, involved the sharing of activities with post-doctoral, master's, undergraduate research, and final course work students, generating knowledge in the areas of research and teaching

Analysis of the influence of thermal insulation parameters on the effectiveness of enclosing structures and building heating systems

The results of thermal engineering calculations of external multilayer enclosing structures of buildings and the thermal power of the heating system of residential buildings are presented, including calculations of temperature fields and partial pressures of water vapor at various parameters of structural layers and thermal insulation layers. Variants are considered and an assessment is given of the variation of parameters and the different location of thermal insulation in external multilayer fences for changes in temperature fields and partial pressures of water vapor in the fence, as well as for changes in the thermal power of the heating system of the building premises for two climatological design areas. The calculations were performed according to the methodology presented below using a specially developed computer program.

КОМП'ЮТЕРНИЙ МОДУЛЬ ДЛЯ АНІМАЦІЇ РУХУ ШАТУННО-ПОВЗУНКОВОЇ ГРУПИ ПРОГРАМИ KDAM ПРИ ВИЗНАЧЕННЯ КІНЕМАТИЧНИХ ТА ДИНАМІЧНИХ ПАРАМЕТРІВ

The development of new schemes of the thread feeding system requires an operational assessment of the value of the tension in front of the working zone. The objective function in the tasks of optimizing technological processes is the minimum necessary tension. The development of special computer programs for determining the tension in the working area makes it possible to determine the necessary technological parameters. The variable parameter in the objective function is the sum of the angles of coverage of the working bodies by the thread. The use of a computer program allows you to determine the tension and change in relative tension in the filling zones of technological machines, which allows you to optimize the shape of the thread supply line even at the stage of designing the technological process. A computer module was developed for the animation of the movement of the connecting rod-slider group, which is a component of the KDAM program for determining the kinematic and dynamic parameters of the connecting rod-slider group of the mechanisms of textile and light industry machines, which allows at the preliminary design stage to visually evaluate the behavior of individual links of the connecting rod mechanism of the slider group and determine the coordinates, projections of velocities and accelerations of the center of mass of the connecting rod, the slider and the points of attachment of the links of the Asura groups on the connecting rod. The KDAM program is a structural element of a computer software complex for assessing the intensity of technological processes in the light and textile industry when determining the change in the relative tension of the thread in the filling zones on the technological equipment. Kinematic and dynamic analysis of flat mechanisms plays a significant role in the design of new mechanisms and modernization of existing ones. The results obtained during these studies can be used to calculate the strength of individual links, their inertial characteristics, optimization of structural parameters of mechanisms, and minimization of consumed energy. The computer module of the KDAM program for determining the kinematic and dynamic parameters of the connecting rod-slider group of mechanisms of light industry machines allows you to determine the coordinates, projections of velocities and accelerations of the center of mass of the connecting rod, slider and the point of attachment of the links of the Asura groups on the connecting rod. During the dynamic analysis of the operation of the connecting rod-slider group, the projections of the full reaction in the joints between the crank and the connecting rod, between the connecting rod and the slider, and between the slider and the fixed guide are determined.

ВЫБОР ТЕХНОЛОГИИ ДЛИТЕЛЬНОГО ХРАНЕНИЯ СЕЛЬСКОХОЗЯЙСТВЕННОЙ ТЕХНИКИ С ПОМОЩЬЮ ПРОГРАММЫ ДЛЯ ЭВМ

Abstract. The newly developed computer program "Calculation of the economic efficiency of the technology of preparation and application of anticorrosive materials for protection of agricultural machinery from corrosion" is presented in the paper. An example of the program use is consistently shown when comparing two technologies of long-term storage of machinery, including the preparation of preservative materials BBM and IBM, and their 2 options of equipment for application - using a pneumatic paint sprayer SO-19 and a portable sprayer PRK-1-2 (option 1), as well as spraying using spray guns RADEX RRP 20114 and FUBAG S750 (option 2). It is assumed that the preservative materials are prepared by the agro-industrial enterprise itself, since the necessary components and technical means are widely available. As a result of the program operation, it was revealed that the cost of preparing the same volumes of IBM is lower than the cost of BBM by 5.1 rubles / liter. The economic effect of preparing IBM was 1020 rubles / year. The costs of applying the preservative material using SO19 were 152.4 rubles/l, while using the PRK-1-2 sprayer they were 89.4 rubles/l. The economic effect of replacing SO-19 when applying the preservative material with the PRK-1-2 was 11,334.2 rubles/year. The total economic effect of using the IBM material and spraying using the PRK-1-2 was 12,354.2 rubles/year. For the second version of equipment for applying preservative materials, the application costs were 191.2 rubles/l for RADEX RRP 20114 and 168.1 rubles/l for FUBAG S750, therefore, the FUBAG S750 spray gun turned out to be more economical and the economic effect of application with it was 4165.1 rubles/year, the effect of using IBM material and the FUBAG S750 spray gun was 5185.1 rubles/year.

Comprehensive analysis of wave interactions and resulting spall damage in layered heterogeneous medium under impact

The effect of dynamic spall damage on the response of layered medium subjected to one-dimensional impact involving an impactor and a multi-layered target is investigated. The study examines the damage caused by elastic waves below the Hugoniot Elastic Limit (HEL) during impact events. Analytical expressions of stress and particle velocity derived from mass and momentum conservation principles are utilized to solve the wave interactions within the impactor-target system, considering reflections, transmissions, and wave interactions between layers. These analytical expressions, integrated into a computational framework, facilitate the monitoring of material responses following each wave interaction, thereby analysing the impact response of the layered medium. Wave interactions, resulting in tensile stresses, that can cause damage to the target have been identified. A strain-based damage initiation and evolution law is incorporated into the developed computer program to predict damage in each layer of a medium. Damage alters the medium’s impact behaviour by decreasing stress magnitude and inducing temporal delays in the response due to attenuated wave propagation speed. The occurrences of tensile stress are explored, analysing spatial and temporal variations of multiple damage incidents within the layered medium. The tension at the interface between two layers can induce damage in one or both adjacent layers, leading to debonding between layers. The effect of damage on the impact response of the medium is analysed by comparing the results for the damaged and undamaged target scenarios. The impact behaviour of a single-layer and a multi-layer target obtained from the present model, in terms of stress and particle velocity, is verified through Finite Element simulations of the identical impact problems, where the damage evolution criterion is incorporated using a VUMAT subroutine. The outcomes derived from this study align closely with Finite Element (FE) results.

Professional codes of morality and the professional codes of conduct of military personnel in different countries

This article presents a study on moral codes and professional codes of conduct. Various professional codes of conduct were considered, including the Samurai Code of Conduct, Code of Chivalry, Pirate Code, Hippocratic Oath and Medical Oath, Red Cross Code of Conduct, Galilean Oath, Code of Apparel Industry Partnership, Ethics in Computer Programming and Software Development, Moral hacking. Special emphasis is placed on Military Ethics and the morale of the serviceman. The article recognizes the golden rule of global ethics as the most important and simple truth for distinguishing right from wrong in human behavior.

AUTOMATION OF LABOR PROTECTION SYSTEM MANAGEMENT AT AN INDUSTRIAL ENTERPRISE

In the hearing State, to which the Republic of Kazakhstan belongs, issues related to occupational safety and health at industrial enterprises, regardless of the form of ownership, are given quite a lot of attention. Because the citizens of the country are the main wealth of the country. If at large enterprises, including with the participation of foreign capital, the process of ensuring labor protection measures is organized to some extent, then at medium-sized and small businesses, work is practically not carried out. Today, in the subjects of medium and small businesses, the organization of accounting, control and timely instruction, if conducted in the old-fashioned way with an entry in journals or in word or excel documents, which today is not only not effective, but also does not ensure the full fulfillment of the duties of an occupational safety engineer and safety regulations (FROM and TB). The adopted Law on Digitalization, the tasks set by the President of the Republic of Kazakhstan in, require managers of industrial enterprises, technical specialists dealing with labor protection issues to radically change the organization of the process of ensuring the learning process, monitoring and compliance with safety and sanitary rules using information technology. The article presents a computer program capable of integrating into an automated industrial enterprise management system, in particular, into an automated workplace of an industrial safety engineer. The developed computer program allows employees of an industrial enterprise (of any division) to be instructed and tested in a remote format directly at the workplace; The practical application of the developed program on a small business entity during the year made it possible to increase the effectiveness of labor protection measures by 25 %, eliminate occupational injuries and reduce the level of safety violations by 75 %. Keywords: control automation system, labor protection, industrial enterprise,information systems, program.

Characterization of loading, relaxation, and recovery behaviors of high‐density polyethylene using a three‐branch spring‐dashpot model

AbstractThis paper presents an analysis of the stress evolution of high‐density polyethylene (HDPE) at loading, relaxation, and recovery stages in a multi‐relaxation‐recovery (RR) test. The analysis is based on a three‐branch spring‐dashpot model that uses the Eyring's law to govern the viscous behavior. The spring‐dashpot model comprises two viscous branches to represent the short‐ and long‐term time‐dependent stress responses to deformation, and a quasi‐static branch to represent the time‐independent stress response. A fast numerical analysis framework based on genetic algorithms was developed to determine values for the model parameters so that the difference between the simulation and the experimental data could be less than 0.08 MPa. Using this approach, values of the model parameters were determined as functions of deformation and time so that the model can simulate the stress response at loading, relaxation, and recovery stages of the RR test. The simulation also generated 10 sets of model parameter values to examine their consistency. The study concludes that the three‐branch model can serve as a suitable tool for analyzing the mechanical properties of HDPE, and values for the model parameters can potentially be used to characterize the difference among PEs for their mechanical performance.Highlights Developed computer programs to determine parameter values automatically. Explained the unusual stress drop during stress recovery after unloading. Evaluated the statistical range of the parameter values for the good fitting.

Articulation of design processes, computing, Cybernetics, and BIM: A retrospective

This article explores the historical and theoretical developments of Building Information Modeling (BIM) and the associated design processes. The study stems from ongoing doctoral research and aims to build an expanded understanding of the informatization process of architectural thought that led to BIM, considering contributions from the Cybernetics and Computing fields. The paper looks into the historical context of the 20th century and highlights the parallel and interdependent developments in Architecture, Cybernetics, and Computer Science. Based on a bibliographic review, retrospective, and theoretical analysis, this article emphasizes the contributions of works that systematized design processes and introduced systemic methodological approaches. Those works acknowledge the value of declaration and structuring of design information and contribute to incorporating computing into design processes and their development. The work presents the contributions of research institutions from the United Kingdom and the United States in developing computer programs for architecture, emphasizing that the geographical diversity of advancements in the field goes beyond these two lines. These computer programs were influenced by cybernetic theories, which were crucial for BIM development, and were created to produce models and systems to describe information. Finally, the importance of translating architectural thought into structured data that might be processable through computer programs, including BIM software, is highlighted, concluding that although BIM and developments of the current digital design processes followed the goal of assisting the production of North Atlantic architectural models, they originated from a broad and diverse historical and geopolitical context of the 20th century, involving theoretical, military, and professional research.

Regression dependence of the number growth dynamics of the biogas plants in Ukraine

The global environmental crisis forces the countries of the world to introduce and use new alternative means of energy production, in particular methods of extraction and processing of biogas to provide energy to the population. Therefore, the determination of the regression dependence, which describes the dynamics of the increase in the number of biogas plants and can be used when forecasting the number of such plants, is an urgent scientific and technical task. The purpose of the research is to determine the regression dependence, which describes the dynamics of the increase in the number of biogas plants and can be used when forecasting the number of such plants, with the aim of increasing the prevalence of the use of renewable energy sources, saving fossil energy sources and simultaneously reducing the intensity of environmental pollution. During the research, the method of regression analysis of the results of one-factor experiments and other paired dependencies was used with the selection of a rational type of function from the sixteen most common options according to the criterion of the maximum value of the correlation coefficient. Regression was carried out on the basis of linearizing transformations, which allow reducing the non-linear dependence to a linear one. The coefficients of the regression equations were determined by the method of least squares using the developed computer program "RegAnalyz", which is protected by a certificate of copyright registration for the work. An adequate regression relationship was obtained, which describes the dynamics of the increase in the number of biogas plants and can be used when forecasting the number of such plants. A graphical dependence was built that describes the dynamics of the increase in the number of biogas plants and allows to visually illustrate this dynamic and show sufficient convergence of theoretical results with actual data. It was established that the increase in the number of biogas plants in Ukraine during 2012-2019 grew according to a hyperbolic dependence.

Особливості проведення лабораторної роботи «Вимірювання опору розтіканню струму заземлюючих пристроїв, питомого опору ґрунту, ізоляції мереж та електроустановок» за допомогою віртуального лабораторного стенда

The materials of this scientific article consider the possibility of using a virtual laboratory stand during the laboratory work carried out by students of higher education institutions under the name «Measurement of the resistance to the spread of the current of grounding devices, the specific resistance of the soil, the insulation of networks and electrical installations». This laboratory work is included in the curriculum of the normative educational component «Occupational safety in the industry and civil protection». The article examines the specific advantages of using a virtual stand, in particular its role in improving the quality of the educational process, expanding access to resources, and optimizing educational costs. The purpose of this article is to consider the main possibilities of using the proposed virtual laboratory stand as an innovative approach in the study of complex technical processes and ensuring a high level of training during laboratory work on the topic «Measurement of resistance to the spread of current of grounding devices, soil resistivity, insulation of networks and electrical installations». This laboratory work is a component of the curriculum of the normative educational component aimed at forming in students the ability to identify, analyze and evaluate potential risks associated with the production environment, and which is entitled «Occupational Safety and Civil Protection». Particular attention is paid to the methodology of conducting laboratory work using a virtual stand, including steps for configuring the software, algorithms for performing measurements and analyzing the received data. Methods of simulating various measurement conditions are described in detail, allowing students to practice scenarios that would be difficult or dangerous to implement in real conditions. In the materials of the article, an overview of the interface and functionality of the developed computer program, which reproduces the control components of real laboratory equipment and is intended for the implementation of the functions of a virtual laboratory stand, is reviewed, the key capabilities of the proposed program are described, including the simulation of various laboratory scenarios and the availability of theoretical materials necessary for preparing and conducting a laboratory session, as well as a detailed reproduction of the appearance and control components of real experimental laboratory equipment, which contributes to the creation of a feeling of working with physical devices, the implementation of mathematical models that accurately describe the dependence of output parameters on input parameters. It was also found that the use of similar technologies during other laboratory works from the above-mentioned normative educational component requires further thorough systematic research and publication of their results.

Multi-criteria optimization calculations to improve the efficiency of an agricultural moving power units in fleet

BACKGROUND: Due to the fact that the development of one target function for separately assessing each agricultural machine used in the fleet seems insufficient to fully assess the efficiency of agricultural moving power units in fleet, a multi-criteria formulation of the problem was applied using the previously developed hardware and software complex MOVI 1.4 and the development of computer programs to carry out their optimization calculations of the efficiency of the agricultural moving power units in fleet the example of a specific farm. AIMS: The goal of the work is to develop software tools for carrying out multi-criteria optimization calculations in order to increase the efficiency of agricultural moving power units in fleet in the context of digitalization of agriculture. METHODS: The analysis is based on the collection of scientific publications, scientific articles and other sources of information on the development of research and experimental design work on the creation of intelligent transport and technical means and the improvement of methodological and software for multi-criteria optimization calculations of the efficiency of the agricultural moving power units in fleet. Methods of scientific generalization and statistical processing of available information and analytical materials from domestic and foreign sources were also used. RESULTS: To calculate the values of quality criteria for the MES fleet, an interface subprogram for MOVI 1.4 was developed in the Pascal programming language, adequate for implementing calculations based on mathematical models of criteria at trial points. After introducing functional and criterion restrictions, an admissible set and a set of Pareto-optimal solutions were constructed, and correlation graphs between quality criteria were constructed. The scientific novelty lies in the development of computer programs for multi-criteria justification of the efficiency of the agricultural moving power units in fleet. CONCLUSION: The practical value lies in the fact that the developed mathematical and software tools can be successfully used for multi-criteria optimization of the efficiency of an agricultural moving power units in fleet using the example of specific agricultural organizations, regions or the country as a whole.

Verification of Euler–Bernoulli beam theory model for wind blade structure analysis

This paper presents a computational tool for analyzing the structural response of wind turbine blades using the advanced Euler–Bernoulli Beam theory. The objective is to achieve efficient computation of blade structural response under aerodynamic loading without sacrificing computational accuracy. This study involves the development of a Python-based computer program as a numerical tool, which utilizes inputs such as blade geometry and aerodynamic loading from Blade Element Momentum theory. The program outputs axially varying moments of inertia, spatial deflections of the blade, and stress distributions within the blade. The numerical tool is verified by comparing the results with both analytical solutions and far more time-consuming commercial finite element solvers. One of the key contribution of this research is the application of the polygon algorithm, which efficiently calculates the moments of inertia of web-stiffened turbine blades along the blade length. It is shown herein that this algorithm significantly reduces computational time while maintaining numerical accuracy as compared to the results obtained from commercially available finite element codes. The study confirms that the advanced Euler–Bernoulli beam theory, when combined with the polygon algorithm, is capable of accurately predicting the structural response of cambered and twisted wind turbine blades during the initial design phase.