Pub Date : 2023-06-07DOI: 10.20998/2079-0775.2023.1.01
O. Bondarenko, O. Ustynenko, Volodymyr Serykov
The relevance of modern metaheuristic algorithms, clarification of a number of terms and relationships between them, the need for classification, as well as metaphors used to describe algorithms are described. This makes it possible to understand the need to cover the specified topic and conduct research on literary sources related to the issue. A number of terms and categories and their interrelationships were considered, which made it possible to propose a classification of metaheuristic algorithms. An approach to the classification of metaheuristic algorithms based on the terms and division of categories taken from the natural sciences is proposed. According to the names of the classes, their filling takes place. This makes it possible to combine a certain segment of knowledge into a cluster with a single terminology. Considering the category of "metaphor" and its functions in the formation of metaheuristic algorithms, it made it possible to gain a deeper understanding of the possibilities of using metaphors in scientific activity and to form a list of requirements for them when describing algorithms. An overview of interesting, original and diverse metaheuristic algorithms was conducted, which made it possible to understand modern trends in this issue, to determine the advantages and disadvantages of algorithms, as well as to understand and shape the role of metaphor in their formation or description. Also, the review makes it possible to distinguish two intellectual directions of using metaphors: helping to increase understanding and intensifying the delivery of the idea to the target audience of an already developed algorithm or strategy and the development of new algorithms or strategies for finding optimal parameters. The system of formation and design of new knowledge and the role of metaphor in it are considered. The system triangle "idea-algorithm-metaphor" has been formed, as well as possible ways of development in this system, which allows the developer to define or choose a certain path and its subsequent stages. Keywords: metaheuristic algorithm, metaphor, optimization.
{"title":"METAHEURISTIC ALGORITHMS. METAPHORS-STRATEGIES (REVIEW ARTICLE)","authors":"O. Bondarenko, O. Ustynenko, Volodymyr Serykov","doi":"10.20998/2079-0775.2023.1.01","DOIUrl":"https://doi.org/10.20998/2079-0775.2023.1.01","url":null,"abstract":"The relevance of modern metaheuristic algorithms, clarification of a number of terms and relationships between them, the need for classification, as well as metaphors used to describe algorithms are described. This makes it possible to understand the need to cover the specified topic and conduct research on literary sources related to the issue. A number of terms and categories and their interrelationships were considered, which made it possible to propose a classification of metaheuristic algorithms. An approach to the classification of metaheuristic algorithms based on the terms and division of categories taken from the natural sciences is proposed. According to the names of the classes, their filling takes place. This makes it possible to combine a certain segment of knowledge into a cluster with a single terminology. Considering the category of \"metaphor\" and its functions in the formation of metaheuristic algorithms, it made it possible to gain a deeper understanding of the possibilities of using metaphors in scientific activity and to form a list of requirements for them when describing algorithms. An overview of interesting, original and diverse metaheuristic algorithms was conducted, which made it possible to understand modern trends in this issue, to determine the advantages and disadvantages of algorithms, as well as to understand and shape the role of metaphor in their formation or description. Also, the review makes it possible to distinguish two intellectual directions of using metaphors: helping to increase understanding and intensifying the delivery of the idea to the target audience of an already developed algorithm or strategy and the development of new algorithms or strategies for finding optimal parameters. The system of formation and design of new knowledge and the role of metaphor in it are considered. The system triangle \"idea-algorithm-metaphor\" has been formed, as well as possible ways of development in this system, which allows the developer to define or choose a certain path and its subsequent stages.\u0000Keywords: metaheuristic algorithm, metaphor, optimization.","PeriodicalId":348363,"journal":{"name":"Bulletin of the National Technical University «KhPI» Series: Engineering and CAD","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124108530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-07DOI: 10.20998/2079-0775.2023.1.05
Jakov Mormylo, V. Zhadan, Viacheslav Danylchenko, M. Tkachuk, A. Grabovskiy, V. Trotsenko, A. Nabokov, Oleg Rіkunov, M. Tkachuk, Anton Vasyliev, Roman Dereviankin, Andrii Koba
The work describes a parametric model of the dynamics and stress-strain state of the elements of the transitional supporting structure of the sub-turret sheet of light armored vehicles. The mass-inertial characteristics of the combat module, the thickness and overall dimensions of the underturret transition sheet, as well as the rate of fire and the caliber of the combat module’s weapons are used as varied parameters. The effect of the thickness of the transition unertower sheet on the natural frequencies and forms of vibrations was studied. The response of the structure to the action of impulse reactive recoil forces when firing from a combat module is also determined. Based on the calculations made for the test design, the regularities of the influence of varied parameters on the dynamics and stress-strain state of the elements of the transitional power structure of the underturret sheet of light armored vehicles were established. The developed model makes it possible to form a specialized database. This database accumulates information about the dynamic, stiffness and strength properties of the system «combat module - transitional structure of the underturret sheet of the armored hull of a lightly armored vehicle». This makes it possible to proceed to the analysis of the properties of real structures, as well as to the formation of recommendations regarding the substantiation of the rational parameters of the elements of lightly armored vehicles that are being designed or modernized. Keywords: lightly armored vehicle; combat module; undertower sheet; dynamics; stress-strain state; varied parameters
{"title":"ANALYSIS OF MODELS OF THE DYNAMICS AND STRESS-DEFORMED STATE OF THE ELEMENTS OF THE TRANSITIONAL SUPPORTING STRUCTURE OF THE TURRET SHEET OF LIGHT ARMORED VEHICLES","authors":"Jakov Mormylo, V. Zhadan, Viacheslav Danylchenko, M. Tkachuk, A. Grabovskiy, V. Trotsenko, A. Nabokov, Oleg Rіkunov, M. Tkachuk, Anton Vasyliev, Roman Dereviankin, Andrii Koba","doi":"10.20998/2079-0775.2023.1.05","DOIUrl":"https://doi.org/10.20998/2079-0775.2023.1.05","url":null,"abstract":"The work describes a parametric model of the dynamics and stress-strain state of the elements of the transitional supporting structure of the sub-turret sheet of light armored vehicles. The mass-inertial characteristics of the combat module, the thickness and overall dimensions of the underturret transition sheet, as well as the rate of fire and the caliber of the combat module’s weapons are used as varied parameters. The effect of the thickness of the transition unertower sheet on the natural frequencies and forms of vibrations was studied. The response of the structure to the action of impulse reactive recoil forces when firing from a combat module is also determined. Based on the calculations made for the test design, the regularities of the influence of varied parameters on the dynamics and stress-strain state of the elements of the transitional power structure of the underturret sheet of light armored vehicles were established. The developed model makes it possible to form a specialized database. This database accumulates information about the dynamic, stiffness and strength properties of the system «combat module - transitional structure of the underturret sheet of the armored hull of a lightly armored vehicle». This makes it possible to proceed to the analysis of the properties of real structures, as well as to the formation of recommendations regarding the substantiation of the rational parameters of the elements of lightly armored vehicles that are being designed or modernized.\u0000Keywords: lightly armored vehicle; combat module; undertower sheet; dynamics; stress-strain state; varied parameters","PeriodicalId":348363,"journal":{"name":"Bulletin of the National Technical University «KhPI» Series: Engineering and CAD","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132350191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-07DOI: 10.20998/2079-0775.2023.1.02
O. Zinchenko
The requirements for the tactical and technical characteristics of the suspension systems of light armored vehicles are constantly growing, taking into account the increase in the intensity of their loads. It is necessary to improve the suspension system, in particular the torsion shafts, which are the most responsible and loaded in the suspension system of light armored vehicles. The existing traditional methods of calculating the torsion shafts of the suspension systems of light armored vehicles do not meet modern requirements. Today, there is a contradiction between the real indicators of strength and durability and those that should be provided for light armored vehicles of the new generation, and especially for future ones. In addition, this contradiction is deepened by the lack of in-depth scientific methods and models of the stress-strain state that would adequately reflect the processes and states in the torsion shafts of the suspension systems of light armored vehicles, and would also become the basis for developing measures to increase their strength and durability. The analysis of literaure showed the absence of a systematic connection of structural solutions, technological modes and load conditions in the calculations of torsion shafts of suspension systems of light armored vehicles. The necessity of creating such a system approach in calculations is shown. Conclusions were made about the need to integrate advanced methods and models in a single methodology for calculating torsional shafts of suspension systems of light armored vehicles. The necessity of linking stress-strain state methods with constructive, technological, and operational factors and developing a suitable specialized software-module complex for carrying out relevant research is shown. Keywords: light armored vehicle; performance characteristics; torsion shaft; suspension systems; stress-strain state; strength; durability; elastic-plastic deformation; contact interaction
{"title":"INTEGRATION OF ADVANCED METHODS AND MODELS IN THE METHODOLOGY OF ENGINEER-ING CALCULATION OF TORSION SHAFTS OF LIGHT ARMORED VEHICLE SUSPENSION SYSTEMS (REVIEW ARTICLE)","authors":"O. Zinchenko","doi":"10.20998/2079-0775.2023.1.02","DOIUrl":"https://doi.org/10.20998/2079-0775.2023.1.02","url":null,"abstract":"The requirements for the tactical and technical characteristics of the suspension systems of light armored vehicles are constantly growing, taking into account the increase in the intensity of their loads. It is necessary to improve the suspension system, in particular the torsion shafts, which are the most responsible and loaded in the suspension system of light armored vehicles. The existing traditional methods of calculating the torsion shafts of the suspension systems of light armored vehicles do not meet modern requirements. Today, there is a contradiction between the real indicators of strength and durability and those that should be provided for light armored vehicles of the new generation, and especially for future ones. In addition, this contradiction is deepened by the lack of in-depth scientific methods and models of the stress-strain state that would adequately reflect the processes and states in the torsion shafts of the suspension systems of light armored vehicles, and would also become the basis for developing measures to increase their strength and durability. The analysis of literaure showed the absence of a systematic connection of structural solutions, technological modes and load conditions in the calculations of torsion shafts of suspension systems of light armored vehicles. The necessity of creating such a system approach in calculations is shown. Conclusions were made about the need to integrate advanced methods and models in a single methodology for calculating torsional shafts of suspension systems of light armored vehicles. The necessity of linking stress-strain state methods with constructive, technological, and operational factors and developing a suitable specialized software-module complex for carrying out relevant research is shown.\u0000Keywords: light armored vehicle; performance characteristics; torsion shaft; suspension systems; stress-strain state; strength; durability; elastic-plastic deformation; contact interaction","PeriodicalId":348363,"journal":{"name":"Bulletin of the National Technical University «KhPI» Series: Engineering and CAD","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125119425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-07DOI: 10.20998/2079-0775.2023.1.12
M. Tkachuk, A. Grabovskiy, M. Tkachuk, O. Shut, Andrii Lipeiko, Egor Ovcharov, Ganna Cymbal, Volodymyr Veiler, I. Klochkov, Denys Kyslytsia
Vibrations of rotor systems are largely determined by elastic characteristics of supports. In the general case, the dependence of displacements on force for such supports is nonlinear. This applies to bearing supports of various types. In addition to bearings, elastic elements are also used in supports of rotor systems. They are designed to change the overall stiffness of the supports. The paper analyzes the radial stiffness of flexible ring dampers used in rotor supports. For this, two main approaches are proposed. The first is a conventional simulation of this problem of contact mechanics using the finite element method. The second is an analytical method that can be used as an alternative to expensive numerical calculations. This method is based on the principle of minimum additional energy. A special closed-form variational formulation is developed using the Euler-Bernoulli beam approximation for an elastic ring and a simplified model of normal contact on the ring flanges. It was shown that the surface tolerances of parts have a significant effect on the radial response of a flexible ring, which can become nonlinear. Tight fit of the ring on both sides makes it much stiffer, and non-tight fit leads to free movement of the rotor and much weaker damping of its movement. Both methods gave results that are consistent for the considered cases. By varying their design parameters, it is possible to adjust the rotor systems from critical modes of operation. Keywords: rotor system, elastic support, rigidity, finite element analysis, stress-strain state, contact interaction, principle of minimum additional energy
{"title":"ANALYSIS OF NONLINEAR RIGIDITY CHARACTERISTICS OF AIR BLOWER COMPRESSOR ELASTIC SUPPORTS","authors":"M. Tkachuk, A. Grabovskiy, M. Tkachuk, O. Shut, Andrii Lipeiko, Egor Ovcharov, Ganna Cymbal, Volodymyr Veiler, I. Klochkov, Denys Kyslytsia","doi":"10.20998/2079-0775.2023.1.12","DOIUrl":"https://doi.org/10.20998/2079-0775.2023.1.12","url":null,"abstract":"Vibrations of rotor systems are largely determined by elastic characteristics of supports. In the general case, the dependence of displacements on force for such supports is nonlinear. This applies to bearing supports of various types. In addition to bearings, elastic elements are also used in supports of rotor systems. They are designed to change the overall stiffness of the supports. The paper analyzes the radial stiffness of flexible ring dampers used in rotor supports. For this, two main approaches are proposed. The first is a conventional simulation of this problem of contact mechanics using the finite element method. The second is an analytical method that can be used as an alternative to expensive numerical calculations. This method is based on the principle of minimum additional energy. A special closed-form variational formulation is developed using the Euler-Bernoulli beam approximation for an elastic ring and a simplified model of normal contact on the ring flanges. It was shown that the surface tolerances of parts have a significant effect on the radial response of a flexible ring, which can become nonlinear. Tight fit of the ring on both sides makes it much stiffer, and non-tight fit leads to free movement of the rotor and much weaker damping of its movement. Both methods gave results that are consistent for the considered cases. By varying their design parameters, it is possible to adjust the rotor systems from critical modes of operation.\u0000Keywords: rotor system, elastic support, rigidity, finite element analysis, stress-strain state, contact interaction, principle of minimum additional energy","PeriodicalId":348363,"journal":{"name":"Bulletin of the National Technical University «KhPI» Series: Engineering and CAD","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129444808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-07DOI: 10.20998/2079-0775.2023.1.11
M. Tkachuk, A. Grabovskiy, Natalija Pinchuk, V. Tretyak, N. Domina, I. Voloshyna
Elements of transmissions and other machine parts in many cases have a complex shape of contacting surfaces. On the one hand, their form is determined by kinematic conditions associated with the transfer of motion between structural elements. On the other hand, the design geometry is limited by strength criteria. Keeping the shape of the contacting surfaces as close to each other as possible generally facilitates the reduction of stress levels. As a result, there is a combined problem of synthesis of geometric form and analysis of kinematic interaction of complex-profile bodies. A general approach that implements objective-driven variation of the shape of the contacting bodies has been developed for this purpose. At the same time, the varied geometric shape is approximated by prismatic finite elements. A topologically regular mesh of finite elements is formed. As a result, it is possible to parametrize the geometrical model of the researched objects, as well as to perform automated multivariate calculations. Accordingly, this array of information becomes the basis for establishing patterns of influence of various factors on the stress-deformed state of contacting bodies. It also makes it possible to formulate recommendations regarding the substantiation of advanced technological solutions of machine parts that transmit mechanical loads through moving contact. Therefore, both the functional properties of these structural components and limitations, for example, in terms of strength and durability, are provided. A method of geometric shape synthesis integrated with generalized parametric modeling was developed, as well as an approach to geometric synthesis of the shape of kinematically generated surfaces. This makes it possible to calculate the distribution of contact pressure and the stress-strain state of contacting complex bodies. For the formation of high-quality finite-element models, a method based on the creation of topologically regular mesh in the curvilinear coordinates of the working surfaces is proposed. The application and effectiveness of the developed methods and models are illustrated on the example of two-parameter transmissions. Correspondence of the results obtained by different methods was confirmed. Keywords: complex-profile bodies; contact interaction; stress-strained state; kinematic interaction
{"title":"TECHNOLOGY OF SHAPING AND ANALYSIS OF CONTACT INTERACTION OF MACHINE PARTS","authors":"M. Tkachuk, A. Grabovskiy, Natalija Pinchuk, V. Tretyak, N. Domina, I. Voloshyna","doi":"10.20998/2079-0775.2023.1.11","DOIUrl":"https://doi.org/10.20998/2079-0775.2023.1.11","url":null,"abstract":"Elements of transmissions and other machine parts in many cases have a complex shape of contacting surfaces. On the one hand, their form is determined by kinematic conditions associated with the transfer of motion between structural elements. On the other hand, the design geometry is limited by strength criteria. Keeping the shape of the contacting surfaces as close to each other as possible generally facilitates the reduction of stress levels. As a result, there is a combined problem of synthesis of geometric form and analysis of kinematic interaction of complex-profile bodies. A general approach that implements objective-driven variation of the shape of the contacting bodies has been developed for this purpose. At the same time, the varied geometric shape is approximated by prismatic finite elements. A topologically regular mesh of finite elements is formed. As a result, it is possible to parametrize the geometrical model of the researched objects, as well as to perform automated multivariate calculations. Accordingly, this array of information becomes the basis for establishing patterns of influence of various factors on the stress-deformed state of contacting bodies. It also makes it possible to formulate recommendations regarding the substantiation of advanced technological solutions of machine parts that transmit mechanical loads through moving contact. Therefore, both the functional properties of these structural components and limitations, for example, in terms of strength and durability, are provided. A method of geometric shape synthesis integrated with generalized parametric modeling was developed, as well as an approach to geometric synthesis of the shape of kinematically generated surfaces. This makes it possible to calculate the distribution of contact pressure and the stress-strain state of contacting complex bodies. For the formation of high-quality finite-element models, a method based on the creation of topologically regular mesh in the curvilinear coordinates of the working surfaces is proposed. The application and effectiveness of the developed methods and models are illustrated on the example of two-parameter transmissions. Correspondence of the results obtained by different methods was confirmed.\u0000Keywords: complex-profile bodies; contact interaction; stress-strained state; kinematic interaction","PeriodicalId":348363,"journal":{"name":"Bulletin of the National Technical University «KhPI» Series: Engineering and CAD","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133972233","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-07DOI: 10.20998/2079-0775.2023.1.06
Sergiy Moiseiev, M. Novikov, Arkadii Burniashev, Glib Pakki, M. Tkachuk, G. Lvov, S. Kravchenko, Sergii Podrieza
The paper is aimed at the development of breakthrough technologies for the strengthening of turbo-expander installations. For this purpose, new ways proposed for ensuring the strength of the most hardly loaded elements of turbo-expander installations. They involve a combination of known methods of discrete and continuous strengthening. However, at the same time, the problem of justification of rational parameters and modes of technological operations arises. This problem is caused by the fact that such complex strengthening methods are characterized by a significantly expanded set of varied parameters. In this wide parametric space, their optimal set differs from the optimal sets in narrower subspaces. To determine the influence of varied parameters on the characteristics of the stress-strain state of contacting discretely-continuously strengthened bodies, a number of studies were carried out. The shape of the strengthening area and the material properties of the strengthened zones are varied. A significant influence of varied parameters on the distribution and level of contact pressure and equivalent stresses in the system of contacting bodies has been established. Based on the analysis of the results of these and a number of other studies, recommendations have been developed regarding the design and technological solutions of elements of turbo-expander installations. On this base, a number of turbo-expander units with improved technical characteristics have been developed. In particular, the growth of their resource and efficiency have been ensured. Keywords: turbo-expander, discrete and continuous strengthening, contact interaction, stress-strain state, technical characteristics
{"title":"DEVELOPMENT OF BREAKTHROUGH TECHNOLOGIES FOR STRENGTHENING OF TURBO-EXPANSION INSTALLATIONS ELEMENTS","authors":"Sergiy Moiseiev, M. Novikov, Arkadii Burniashev, Glib Pakki, M. Tkachuk, G. Lvov, S. Kravchenko, Sergii Podrieza","doi":"10.20998/2079-0775.2023.1.06","DOIUrl":"https://doi.org/10.20998/2079-0775.2023.1.06","url":null,"abstract":"The paper is aimed at the development of breakthrough technologies for the strengthening of turbo-expander installations. For this purpose, new ways proposed for ensuring the strength of the most hardly loaded elements of turbo-expander installations. They involve a combination of known methods of discrete and continuous strengthening. However, at the same time, the problem of justification of rational parameters and modes of technological operations arises. This problem is caused by the fact that such complex strengthening methods are characterized by a significantly expanded set of varied parameters. In this wide parametric space, their optimal set differs from the optimal sets in narrower subspaces. To determine the influence of varied parameters on the characteristics of the stress-strain state of contacting discretely-continuously strengthened bodies, a number of studies were carried out. The shape of the strengthening area and the material properties of the strengthened zones are varied. A significant influence of varied parameters on the distribution and level of contact pressure and equivalent stresses in the system of contacting bodies has been established. Based on the analysis of the results of these and a number of other studies, recommendations have been developed regarding the design and technological solutions of elements of turbo-expander installations. On this base, a number of turbo-expander units with improved technical characteristics have been developed. In particular, the growth of their resource and efficiency have been ensured. Keywords: turbo-expander, discrete and continuous strengthening, contact interaction, stress-strain state, technical characteristics","PeriodicalId":348363,"journal":{"name":"Bulletin of the National Technical University «KhPI» Series: Engineering and CAD","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131031448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-07DOI: 10.20998/2079-0775.2023.1.07
Mikhail Mikhail Podrigalo, V. Garmash, S. Horielyshev, D. Baulin, Hennadii Yarovyi, Iryna Sydorenko Irya
A large number of scientific works and design developments are devoted to the study and improvement of the properties of maneuverability, which is also a complex (complex) property. At one time, the need to reduce the building volume required the installation of swivel wheels on the front steering axle of the car. However, in this case, additional resistance to the movement of the machine arose, which is due to the discrepancy between the trajectories of the movement of the front outer and inner guide wheels with their trajectories during an ideal turn. The development of the designs of electric vehicles and hybrid vehicles allows for separate control of the front wheels. The analysis of the whole variety of indicators and criteria of maneuverability in general and individual properties was carried out. Unlike other systematization of these indicators and criteria, it is proposed to divide these indicators and criteria into three main groups. All indicators and criteria used to assess the maneuverability of vehicles are also used to assess the maneuverability of wheeled tractors with a center of mass shifted to the rear axle and, therefore, have low controllability. Force and energy criteria can be used in the design of cars and tractors to ensure the ability of the latter to maneuver. In addition, as a result of the study, a combined method for controlling the movement of a two-axle swivel bogie of a wheeled vehicle has been improved due to the fact that its rotation is carried out by two torque control moments. The first of these control torques is generated by the driver through the steering and power cylinder. The second torque control moment is created due to the difference in torques on the wheels of the outer and inner sides of the two-axle swivel bogie. The implementation of these rules for regulating the distribution of traction forces between the sides makes it possible to overcome the resistance to rotation of a two-axle swivel bogie and improve the quality of motion control of the specified bogie and wheeled vehicle. Keywords: maneuverability, separate control, wheeled vehicle, control method, two-axle swivel bogie
{"title":"IMPROVING MANEUVERABILITY OF A WHEELED VEHICLE BY IMPROVING TURN CONTROL METHOD","authors":"Mikhail Mikhail Podrigalo, V. Garmash, S. Horielyshev, D. Baulin, Hennadii Yarovyi, Iryna Sydorenko Irya","doi":"10.20998/2079-0775.2023.1.07","DOIUrl":"https://doi.org/10.20998/2079-0775.2023.1.07","url":null,"abstract":"A large number of scientific works and design developments are devoted to the study and improvement of the properties of maneuverability, which is also a complex (complex) property. At one time, the need to reduce the building volume required the installation of swivel wheels on the front steering axle of the car. However, in this case, additional resistance to the movement of the machine arose, which is due to the discrepancy between the trajectories of the movement of the front outer and inner guide wheels with their trajectories during an ideal turn. The development of the designs of electric vehicles and hybrid vehicles allows for separate control of the front wheels. The analysis of the whole variety of indicators and criteria of maneuverability in general and individual properties was carried out. Unlike other systematization of these indicators and criteria, it is proposed to divide these indicators and criteria into three main groups. All indicators and criteria used to assess the maneuverability of vehicles are also used to assess the maneuverability of wheeled tractors with a center of mass shifted to the rear axle and, therefore, have low controllability. Force and energy criteria can be used in the design of cars and tractors to ensure the ability of the latter to maneuver. In addition, as a result of the study, a combined method for controlling the movement of a two-axle swivel bogie of a wheeled vehicle has been improved due to the fact that its rotation is carried out by two torque control moments. The first of these control torques is generated by the driver through the steering and power cylinder. The second torque control moment is created due to the difference in torques on the wheels of the outer and inner sides of the two-axle swivel bogie. The implementation of these rules for regulating the distribution of traction forces between the sides makes it possible to overcome the resistance to rotation of a two-axle swivel bogie and improve the quality of motion control of the specified bogie and wheeled vehicle.\u0000Keywords: maneuverability, separate control, wheeled vehicle, control method, two-axle swivel bogie","PeriodicalId":348363,"journal":{"name":"Bulletin of the National Technical University «KhPI» Series: Engineering and CAD","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127117557","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-07DOI: 10.20998/2079-0775.2023.1.04
G. Lisachuk, M. Tkachuk, Anton Vasyliev, D. Breslavsky, R. Kryvobok, V. Voloshchuk
In the work using the finite element method, an analysis of the behavior of nose fairings made of radio-transparent ceramic materials of celsian composition was carried out. Determination of parameters of gas dynamics and stress-strain state was carried out using licensed ANSYS software. SSG Reynold Stress turbulence model was chosen for accurate air flow simulation. Geometric and finite element models were used to calculate strength and temperature fields. The analysis of the results of gas-dynamic calculations shows that at the point of transition of the conical part of the rocket into the cylindrical part, there is a sharp change in the flow conditions and a disruption of the flow in the range of speeds of 100-1100 m/s. As a result of modeling the distribution of temperature fields with the stated task, it was established that the temperature on the inner surface of the fairing differs from the temperature on the outer surface by no more than ±1 °C on average, and the maximum surface heating temperature does not exceed 550 °C. According to the results of calculations of the stress-strain state under temperature regimes that simulate the conditions of their operation, it was concluded that under the considered conditions the equivalent (≤ 69.3 MPa) and main (≤ 40 MPa) stresses occurring in the nose fairing are not exceed the bending strength limit for celsian ceramics (290 MPa). It can be observed that the maximum temperature difference in thickness corresponds to the part of the fairing with the minimum radius. Movements on the surface of the fairing do not exceed 0.25 mm, which is acceptable according to the specified parameters. The parametric model provides advantages in justifying rational technical solutions. Ultimately, the nose fairing, made of celsian ceramics, will maintain its integrity in real operating conditions. Keywords: radiotransparent celsian ceramics; nose fairing; finite element method; gas dynamics; thermophysical calculations; strength; stress-strain state
{"title":"CALCULATION OF GAS-DYNAMICS PARAMETERS AND STRESS-STRAIN STATE OF CELSIAN CERAMICS PRODUCTS","authors":"G. Lisachuk, M. Tkachuk, Anton Vasyliev, D. Breslavsky, R. Kryvobok, V. Voloshchuk","doi":"10.20998/2079-0775.2023.1.04","DOIUrl":"https://doi.org/10.20998/2079-0775.2023.1.04","url":null,"abstract":"In the work using the finite element method, an analysis of the behavior of nose fairings made of radio-transparent ceramic materials of celsian composition was carried out. Determination of parameters of gas dynamics and stress-strain state was carried out using licensed ANSYS software. SSG Reynold Stress turbulence model was chosen for accurate air flow simulation. Geometric and finite element models were used to calculate strength and temperature fields. The analysis of the results of gas-dynamic calculations shows that at the point of transition of the conical part of the rocket into the cylindrical part, there is a sharp change in the flow conditions and a disruption of the flow in the range of speeds of 100-1100 m/s. As a result of modeling the distribution of temperature fields with the stated task, it was established that the temperature on the inner surface of the fairing differs from the temperature on the outer surface by no more than ±1 °C on average, and the maximum surface heating temperature does not exceed 550 °C. According to the results of calculations of the stress-strain state under temperature regimes that simulate the conditions of their operation, it was concluded that under the considered conditions the equivalent (≤ 69.3 MPa) and main (≤ 40 MPa) stresses occurring in the nose fairing are not exceed the bending strength limit for celsian ceramics (290 MPa). It can be observed that the maximum temperature difference in thickness corresponds to the part of the fairing with the minimum radius. Movements on the surface of the fairing do not exceed 0.25 mm, which is acceptable according to the specified parameters. The parametric model provides advantages in justifying rational technical solutions. Ultimately, the nose fairing, made of celsian ceramics, will maintain its integrity in real operating conditions.\u0000Keywords: radiotransparent celsian ceramics; nose fairing; finite element method; gas dynamics; thermophysical calculations; strength; stress-strain state","PeriodicalId":348363,"journal":{"name":"Bulletin of the National Technical University «KhPI» Series: Engineering and CAD","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123629689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-07DOI: 10.20998/2079-0775.2023.1.08
M. Podrigalo, Leonid Razarenov, Oleksandr Zakapko
In known scientific and technical literature, insufficient attention is paid to the study of dynamic processes of wheeled vehicles with a steering front axle. The use of front swivel axle on a self-propelled chassis makes it possible to minimize the moment of resistance to turning and reduce the wear of front wheel tires in comparison with rotary guide wheels. This modernization can provide a wider range of attachments for mechanized work equipment. The aim of this work is to increase the stability of the rectilinear steady-state motion of a self-propelled tractor chassis by creating stabilizing moments on the front pivot axle by shifting the axis of rotation of the front axle in the direction of the longitudinal axis of the machine. The stability of the rectilinear steady-state motion of a self-propelled tractor chassis is investigated when creating stabilizing moments on the front steering axle by shifting the vertical axis of rotation of the front axle in the direction of the longitudinal axis of the machine. This scientific article shows that when the steering axle moves, it is possible to reduce the lateral force on the front axle to zero, which makes it possible to reduce the moment of resistance to turning. A straight-line steady-state movement of a tractor is considered, where a violation of the stability of the front steering axle may occur during a short-term impact on an obstacle on the road. In some cases, the angular acceleration and angular velocity of the bridge in the road plane may be the exciting factor. The loading scheme of a front swing bridge under the action of an exciting angular acceleration is determined. The calculation of the effect of the exciting factors on the power steering cylinder is presented. The stabilizing moment that occurs when the axis of the vertical shaft of the front steering axle drive is displaced is determined. The differential equation of the front axle's circular motion was analyzed, which revealed its stability under the action of short-term excitatory forces in the rectilinear steady-state motion of the self-propelled chassis. An estimation of the motion of the front steering axle of a self-propelled chassis is presented, with the determined proportionality coefficients and coefficients of the differential equation, which describes the stable motion of the front steering axle in the steady-state rectilinear motion of the machine under the action of short-term disturbing forces. Keywords: self-propelled chassis, front swivel axle, stability, stabilizing moment, steady-state motion
{"title":"ASSESSMENT OF THE STABILITY OF THE FRONT PIVOT AXLE DURING STEADY-STATE MOTION OF A TRACTOR SELF-PROPELLED CHASSIS","authors":"M. Podrigalo, Leonid Razarenov, Oleksandr Zakapko","doi":"10.20998/2079-0775.2023.1.08","DOIUrl":"https://doi.org/10.20998/2079-0775.2023.1.08","url":null,"abstract":"In known scientific and technical literature, insufficient attention is paid to the study of dynamic processes of wheeled vehicles with a steering front axle. The use of front swivel axle on a self-propelled chassis makes it possible to minimize the moment of resistance to turning and reduce the wear of front wheel tires in comparison with rotary guide wheels. This modernization can provide a wider range of attachments for mechanized work equipment. The aim of this work is to increase the stability of the rectilinear steady-state motion of a self-propelled tractor chassis by creating stabilizing moments on the front pivot axle by shifting the axis of rotation of the front axle in the direction of the longitudinal axis of the machine. The stability of the rectilinear steady-state motion of a self-propelled tractor chassis is investigated when creating stabilizing moments on the front steering axle by shifting the vertical axis of rotation of the front axle in the direction of the longitudinal axis of the machine. This scientific article shows that when the steering axle moves, it is possible to reduce the lateral force on the front axle to zero, which makes it possible to reduce the moment of resistance to turning. A straight-line steady-state movement of a tractor is considered, where a violation of the stability of the front steering axle may occur during a short-term impact on an obstacle on the road. In some cases, the angular acceleration and angular velocity of the bridge in the road plane may be the exciting factor. The loading scheme of a front swing bridge under the action of an exciting angular acceleration is determined. The calculation of the effect of the exciting factors on the power steering cylinder is presented. The stabilizing moment that occurs when the axis of the vertical shaft of the front steering axle drive is displaced is determined. The differential equation of the front axle's circular motion was analyzed, which revealed its stability under the action of short-term excitatory forces in the rectilinear steady-state motion of the self-propelled chassis. An estimation of the motion of the front steering axle of a self-propelled chassis is presented, with the determined proportionality coefficients and coefficients of the differential equation, which describes the stable motion of the front steering axle in the steady-state rectilinear motion of the machine under the action of short-term disturbing forces.\u0000Keywords: self-propelled chassis, front swivel axle, stability, stabilizing moment, steady-state motion","PeriodicalId":348363,"journal":{"name":"Bulletin of the National Technical University «KhPI» Series: Engineering and CAD","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121870514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-22DOI: 10.20998/2079-0775.2023.1.13
M. Tkachuk, I. Hrechka, M. Tkachuk, Volodymyr Sierykov, A. Grabovskiy, N. Pinchuk, Нanna Tkachuk, I. Klochkov, Heorgii Tsendra, Andriy Shevchenko, Vladyslav Kyrychuk, Dmytro Friziuk
The work delivers solution to a relevant scientific problem of solid mechanics. It consists in developing theoretical basis for computational and experimental research of contact interaction of complex-shaped bodies with account for micromechanical models of roughness and other intermediate or surface layers. New methods and models have been developed for the analysis of contact interaction of complex-shaped bodies with account for the micromechanical properties of surface and intermediate layers characterized by nonlinear local contact stiffness. The developed methods and models as well as the numerical analysis tools have been applied to a series of model and applied problems. The deformation behaviour of novel materials with network microstructures of one-dimensional elements has been determined. Macroscopical properties of these materials have been evaluated based on the special microscopic models and the homogenization methods. Regularities in contact distribution and its dependence on geometrical and physical factors have been determined for various complexshaped bodies. New design solutions for machine elements that improve their strength and durability have been justified. The developed methods and analysis tools have been introduced into the design of new engineering products. Their implementation resulted in improved technical characteristics of protection, structural and functional elements of transport vehicles of special purpose, gear transmissions, technical equipment, hydrovolumetric drives and so on. The conducted computational and experimental studies showed good agreement with the real response of network materials and the observed behavior of interacting elastic bodies with intermediate contact layer. Keywords: solid mechanics, complex-shaped body, contact interaction, contact pressure, intermediate layer
{"title":"INTEGRATED CALCULATION AND EXPERIMENTAL TECHNOLOGY FOR ANALYSIS OF CONTACT INTERACTION WITH ACCOUNT OF ELASTIC INTERMEDIATE LAYER","authors":"M. Tkachuk, I. Hrechka, M. Tkachuk, Volodymyr Sierykov, A. Grabovskiy, N. Pinchuk, Нanna Tkachuk, I. Klochkov, Heorgii Tsendra, Andriy Shevchenko, Vladyslav Kyrychuk, Dmytro Friziuk","doi":"10.20998/2079-0775.2023.1.13","DOIUrl":"https://doi.org/10.20998/2079-0775.2023.1.13","url":null,"abstract":"The work delivers solution to a relevant scientific problem of solid mechanics. It consists in developing theoretical basis for computational and experimental research of contact interaction of complex-shaped bodies with account for micromechanical models of roughness and other intermediate or surface layers. New methods and models have been developed for the analysis of contact interaction of complex-shaped bodies with account for the micromechanical properties of surface and intermediate layers characterized by nonlinear local contact stiffness. The developed methods and models as well as the numerical analysis tools have been applied to a series of model and applied problems. The deformation behaviour of novel materials with network microstructures of one-dimensional elements has been determined. Macroscopical properties of these materials have been evaluated based on the special microscopic models and the homogenization methods. Regularities in contact distribution and its dependence on geometrical and physical factors have been determined for various complexshaped bodies. New design solutions for machine elements that improve their strength and durability have been justified. The developed methods and analysis tools have been introduced into the design of new engineering products. Their implementation resulted in improved technical characteristics of protection, structural and functional elements of transport vehicles of special purpose, gear transmissions, technical equipment, hydrovolumetric drives and so on. The conducted computational and experimental studies showed good agreement with the real response of network materials and the observed behavior of interacting elastic bodies with intermediate contact layer.\u0000Keywords: solid mechanics, complex-shaped body, contact interaction, contact pressure, intermediate layer","PeriodicalId":348363,"journal":{"name":"Bulletin of the National Technical University «KhPI» Series: Engineering and CAD","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131490483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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