Pub Date : 2022-12-28DOI: 10.20998/2079-0775.2022.1.11
M. Tkachuk, A. Grabovskiy, O. Shut, Andrey Lipeiko, Egor Ovcharov, M. Tkachuk, Mykola Prokopenko, V. Tretyak, I. Klochkov, M. Saverska, S. Kutsenko, N. Pinchuk
The stress-strain state and critical rotation speeds of the air blower rotor part of highly forced engine are investigated. For this purpose, their parametric geometric and finite-element models are built. Due to the high speeds of rotation, the impeller disk acquires an umbrella-shaped deformed shape. This deformation can cause a gap to be selected between the impellers and the stator of the supercharger. In areas of abrupt change of shape on the impeller there is a concentration of stresses. In addition, the supercharger impeller is located cantilevered. This causes low critical speeds. These frequencies may fall within the operating range of angular velocities of the supercharger rotor. All these factors in the complex within a single calculation model were not previously taken into account. Instead, taking into account the dependences of stress, strain and critical velocity levels on the design parameters is of interest in the development of supercharger designs. In particular, the stiffness characteristics of the elastic rotor bearings were varied. The influence of these parameters on the critical rotation speeds of the rotor part of the air supercharger is determined. Recommendations have been developed for debugging from hazardous supercharger modes. In particular, it is proposed to reduce the radial stiffness of the shaft bearings by using elastic flexible rings. This can reduce critical rotor velocities beyond the operating range. In addition, a lighter material can be used to increase the strength of the impeller. It is also possible to limit the operating range of the angular rotational velocities of the rotor part of the investigated air blower. Analysis of the stress-strain state and the critical rotational velocities of the rotor were carried out on the basis of a unified generalized mathematical and numerical model. Keywords: rotor system, air blower, impeller, stress-strain state, critical rotation speed
{"title":"STRESS-STRAIN STATE AND CRITICAL ROTATIONAL VELOCITIES OF AIR BLOWER ROTOR PART OF A HIGH BOOST ENGINE","authors":"M. Tkachuk, A. Grabovskiy, O. Shut, Andrey Lipeiko, Egor Ovcharov, M. Tkachuk, Mykola Prokopenko, V. Tretyak, I. Klochkov, M. Saverska, S. Kutsenko, N. Pinchuk","doi":"10.20998/2079-0775.2022.1.11","DOIUrl":"https://doi.org/10.20998/2079-0775.2022.1.11","url":null,"abstract":"The stress-strain state and critical rotation speeds of the air blower rotor part of highly forced engine are investigated. For this purpose, their parametric geometric and finite-element models are built. Due to the high speeds of rotation, the impeller disk acquires an umbrella-shaped deformed shape. This deformation can cause a gap to be selected between the impellers and the stator of the supercharger. In areas of abrupt change of shape on the impeller there is a concentration of stresses. In addition, the supercharger impeller is located cantilevered. This causes low critical speeds. These frequencies may fall within the operating range of angular velocities of the supercharger rotor. All these factors in the complex within a single calculation model were not previously taken into account. Instead, taking into account the dependences of stress, strain and critical velocity levels on the design parameters is of interest in the development of supercharger designs. In particular, the stiffness characteristics of the elastic rotor bearings were varied. The influence of these parameters on the critical rotation speeds of the rotor part of the air supercharger is determined. Recommendations have been developed for debugging from hazardous supercharger modes. In particular, it is proposed to reduce the radial stiffness of the shaft bearings by using elastic flexible rings. This can reduce critical rotor velocities beyond the operating range. In addition, a lighter material can be used to increase the strength of the impeller. It is also possible to limit the operating range of the angular rotational velocities of the rotor part of the investigated air blower. Analysis of the stress-strain state and the critical rotational velocities of the rotor were carried out on the basis of a unified generalized mathematical and numerical model.\u0000Keywords: rotor system, air blower, impeller, stress-strain state, critical rotation speed","PeriodicalId":348363,"journal":{"name":"Bulletin of the National Technical University «KhPI» Series: Engineering and CAD","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127201007","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 : 2022-12-28DOI: 10.20998/2079-0775.2022.2.03
A. Grabovskiy, M. Tkachuk, Olga Kokhanovska, M. Tkachuk, N. Domina, Ganna Tkachuk, M. Saverska, S. Kutsenko, I. Klochkov, I. Voloshina, V. Tretyak
In this work, on the development of previous research, a model of contact interaction of similar shape bodies is built. Contact in the system "punch - stamped material - matrix" is considered. A gap is set between the material to be stamped and the matrix, which varies in circular coordinate. The regularities of the change of contact pressure and contact areas with variation of the law of distribution of the initial gap are determined. The influence of the load level on these parameters is also determined. In particular, the analysis of the influence of the number of waves in the distribution of the initial gap in the circular direction on the nature of the distribution of contact areas and contact pressure. It is established that at low level of loads significant non-uniformity of the contact pressure distribution along the circular coordinate is realized. In the future, with increasing load levels, this unevenness decreases. The distribution of contact pressure tends to the case of contact with nominally coincident surfaces of the matrix and the material to be stamped, i.e. at zero gap. Thus, an analytical-numerical method for studying the contact interaction of closely shaped bodies with low perturbation of the initial gap distribution has been developed. Regularities of influence of constructive and technological parameters on contact interaction of these bodies on an example of elements of stamp equipment are also established. Keywords: contact interaction; stress-strain state; elements of stamps; contact area; contact pressure
{"title":"CONTACT INTERACTION OF SIMILAR SHAPE BODIES AT SMALL DISTURBANCE OF INITIAL GAP DISTRIBUTION","authors":"A. Grabovskiy, M. Tkachuk, Olga Kokhanovska, M. Tkachuk, N. Domina, Ganna Tkachuk, M. Saverska, S. Kutsenko, I. Klochkov, I. Voloshina, V. Tretyak","doi":"10.20998/2079-0775.2022.2.03","DOIUrl":"https://doi.org/10.20998/2079-0775.2022.2.03","url":null,"abstract":"In this work, on the development of previous research, a model of contact interaction of similar shape bodies is built. Contact in the system \"punch - stamped material - matrix\" is considered. A gap is set between the material to be stamped and the matrix, which varies in circular coordinate. The regularities of the change of contact pressure and contact areas with variation of the law of distribution of the initial gap are determined. The influence of the load level on these parameters is also determined. In particular, the analysis of the influence of the number of waves in the distribution of the initial gap in the circular direction on the nature of the distribution of contact areas and contact pressure. It is established that at low level of loads significant non-uniformity of the contact pressure distribution along the circular coordinate is realized. In the future, with increasing load levels, this unevenness decreases. The distribution of contact pressure tends to the case of contact with nominally coincident surfaces of the matrix and the material to be stamped, i.e. at zero gap. Thus, an analytical-numerical method for studying the contact interaction of closely shaped bodies with low perturbation of the initial gap distribution has been developed. Regularities of influence of constructive and technological parameters on contact interaction of these bodies on an example of elements of stamp equipment are also established.\u0000Keywords: contact interaction; stress-strain state; elements of stamps; contact area; contact pressure","PeriodicalId":348363,"journal":{"name":"Bulletin of the National Technical University «KhPI» Series: Engineering and CAD","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126597919","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 : 2022-12-28DOI: 10.20998/2079-0775.2022.1.03
A. Grabovskiy, Anton Vasyliev, M. Tkachuk, I. Voloshina, Oleg Loznyi, M. Tkachuk, I. Khramtsova, Olha Kokhanovska, Yevhen Peleshko, A. Nabokov, V. Trotsenko
At the stage of design research of armored bodies of lightly armored vehicles it is extremely important to determine the range of their natural frequencies and natural forms of oscillation. For this purpose, the finite element method is usually used. It is necessary to substantiate the parameters of the finite element model, which provide an acceptable level of accuracy of numerical modeling of dynamic properties of this type of structures. For this purpose, data from parallel numerical and experimental studies of the mock-up of the armored hull of the armored personnel carrier are used. The mock-up of the upper projection of the armored hull is made in the appropriate scale. The material is sheet steel. This mock-up is subjected to dynamic excitation on a vibrating table. Resonant excitation frequencies are recorded, as well as the natural vibration forms. Shock-pulse excitation of the armored hull’s mock-up was also performed. The response to this excitation is recorded using accelerometers. Then, the spectrum of natural vibration frequencies is determined from these oscillograms. In parallel, numerical modeling of natural frequencies and natural vibration forms of the armored hull’s mock-up is carried out. After that, the results of numerical and experimental studies are compared. By varying the parameters of the finite element model, a satisfactory correspondence between the results of numerical calculations and experimental measurements is achieved. In particular, the following are determined: the acceptable type of used finite elements; the number of finite elements required to satisfy the accuracy of numerical modeling of the dynamic properties of similar structures; zones of the recommended thickening-rarefaction of a grid of finite elements, etc. According to the research results, the parameters of finite-element models have been established, which can be used to study the dynamic processes and properties of full-scale armored hulls of lightly armored vehicles. Keywords: lightly armored vehicle, mock-up, natural frequency, spectrum of natural vibration frequencies
{"title":"ARMORED HULLS OF DOMESTIC ARMORED PERSONNEL CARRIERS: COMPUTER AND MOCK-UP MODELING OF DYNAMIC PROPERTIES","authors":"A. Grabovskiy, Anton Vasyliev, M. Tkachuk, I. Voloshina, Oleg Loznyi, M. Tkachuk, I. Khramtsova, Olha Kokhanovska, Yevhen Peleshko, A. Nabokov, V. Trotsenko","doi":"10.20998/2079-0775.2022.1.03","DOIUrl":"https://doi.org/10.20998/2079-0775.2022.1.03","url":null,"abstract":"At the stage of design research of armored bodies of lightly armored vehicles it is extremely important to determine the range of their natural frequencies and natural forms of oscillation. For this purpose, the finite element method is usually used. It is necessary to substantiate the parameters of the finite element model, which provide an acceptable level of accuracy of numerical modeling of dynamic properties of this type of structures. For this purpose, data from parallel numerical and experimental studies of the mock-up of the armored hull of the armored personnel carrier are used. The mock-up of the upper projection of the armored hull is made in the appropriate scale. The material is sheet steel. This mock-up is subjected to dynamic excitation on a vibrating table. Resonant excitation frequencies are recorded, as well as the natural vibration forms. Shock-pulse excitation of the armored hull’s mock-up was also performed. The response to this excitation is recorded using accelerometers. Then, the spectrum of natural vibration frequencies is determined from these oscillograms. In parallel, numerical modeling of natural frequencies and natural vibration forms of the armored hull’s mock-up is carried out. After that, the results of numerical and experimental studies are compared. By varying the parameters of the finite element model, a satisfactory correspondence between the results of numerical calculations and experimental measurements is achieved. In particular, the following are determined: the acceptable type of used finite elements; the number of finite elements required to satisfy the accuracy of numerical modeling of the dynamic properties of similar structures; zones of the recommended thickening-rarefaction of a grid of finite elements, etc. According to the research results, the parameters of finite-element models have been established, which can be used to study the dynamic processes and properties of full-scale armored hulls of lightly armored vehicles. \u0000Keywords: lightly armored vehicle, mock-up, natural frequency, spectrum of natural vibration frequencies","PeriodicalId":348363,"journal":{"name":"Bulletin of the National Technical University «KhPI» Series: Engineering and CAD","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122764828","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 : 2022-12-28DOI: 10.20998/2079-0775.2022.1.05
H. Ivanets, M. Ivanets, S. Horielyshev, D. Baulin, I. Sydorenko
Nowadays emergency prevention should be considered as a complex compatible process of predicting emergencies and early response to the threats of their occurrence or mitigation of possible consequences. This implements a systematic approach to this problem solving in order to prevent their occurrence or minimize possible consequences of them. The organizational and technical method of compatible forecasting and ensuring the readiness to respond to emergencies in real conditions has been developed. This method is based on a formalized mathematical model of compatible forecasting and ensuring the readiness of civil protection units to respond to emergencies. It provides for the forecasting of emergencies, possible losses caused as a result of them and the comprehensive provision of readiness of civil protection units respond to possible threats. The control algorithm for the implementation of the organizational and technical method of compatible forecasting and ensuring the readiness of responding of civil protection units to emergencies has been developed. Its use involves the implementation of a number of interconnected procedures. Firstly, the collection, formalization and analysis of information about emergencies are carried out. Then the complexity of civil protection units with armaments and equipment and their readiness, as well as the staffing of civil protection units by personnel, are taken into consideration. These procedures ensure the emergencies prediction and readiness to possible threats respond. The received information is taken into account when justifying and forming a decision on the actions of civil protection units to adequately respond and eliminate the consequences of emergencies. The correction of emergency solutions, based on the analysis of the effectiveness of response units actions, is carried out. Keywords: formalized mathematical model, organizational and technical method, control algorithm, emergency, losses from emergencies, level of readiness
{"title":"DEVELOPMENT OF ORGANIZATIONAL AND TECHNICAL METHOD OF COMPATIBLE FORECASTING AND ENSURING READINESS TO RESPOND TO EMERGENCIES","authors":"H. Ivanets, M. Ivanets, S. Horielyshev, D. Baulin, I. Sydorenko","doi":"10.20998/2079-0775.2022.1.05","DOIUrl":"https://doi.org/10.20998/2079-0775.2022.1.05","url":null,"abstract":"Nowadays emergency prevention should be considered as a complex compatible process of predicting emergencies and early response to the threats of their occurrence or mitigation of possible consequences. This implements a systematic approach to this problem solving in order to prevent their occurrence or minimize possible consequences of them. The organizational and technical method of compatible forecasting and ensuring the readiness to respond to emergencies in real conditions has been developed. This method is based on a formalized mathematical model of compatible forecasting and ensuring the readiness of civil protection units to respond to emergencies. It provides for the forecasting of emergencies, possible losses caused as a result of them and the comprehensive provision of readiness of civil protection units respond to possible threats. The control algorithm for the implementation of the organizational and technical method of compatible forecasting and ensuring the readiness of responding of civil protection units to emergencies has been developed. Its use involves the implementation of a number of interconnected procedures. Firstly, the collection, formalization and analysis of information about emergencies are carried out. Then the complexity of civil protection units with armaments and equipment and their readiness, as well as the staffing of civil protection units by personnel, are taken into consideration. These procedures ensure the emergencies prediction and readiness to possible threats respond. The received information is taken into account when justifying and forming a decision on the actions of civil protection units to adequately respond and eliminate the consequences of emergencies. The correction of emergency solutions, based on the analysis of the effectiveness of response units actions, is carried out. \u0000Keywords: formalized mathematical model, organizational and technical method, control algorithm, emergency, losses from emergencies, level of readiness","PeriodicalId":348363,"journal":{"name":"Bulletin of the National Technical University «KhPI» Series: Engineering and CAD","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132861213","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 : 2022-12-28DOI: 10.20998/2079-0775.2022.1.06
Viacheslav Bantkovskiy, S. Luzan
The development of machine designs occurs with a constant desire to increase their productivity, which is almost always accompanied by an increase in the mechanical and thermal tension of the movable joints of parts. At the same time, the tasks of achieving high reliability and durability of the machine, reducing its weight, reducing the consumption of scarce materials are set. Based on a comprehensive assessment of automotive parts that determine the resource, it was found that abrasive wear prevails over all other types of wear. About 83% of automotive parts have wear up to 0.6 mm. When interacting with the soil, the working bodies of tillage and planting machines are subjected to intense abrasive wear. In addition, the working bodies of agricultural machines are operated in a chemically abrasive environment, which is associated with the addition of various fertilizers to the soil and the presence of moisture in it. Together, these factors have such a strong influence on the working bodies of agricultural machines, which makes them unusable after almost several hours of intensive work. Currently, in Ukraine, the following working bodies of tillage machines are used for tillage in agriculture: ploughshares, pointed and one-sided cultivator paws, various coulter designs, harrow discs, husker discs, baking powder, etc. In the soil environment, the working bodies are subject to intense abrasive wear. Typical representatives of the working bodies of tillage machines with cutting elements are the paws of cultivators designed for loosening, destroying weeds and mixing soil particles. The analysis of methods and methods of restoration of machine parts used at the enterprises of the agro-industrial complex showed that more than 60% of the parts are restored by surfacing and gas thermal spraying. Keywords: resource, repair, restoration, surfacing, thermal spraying, wear, durability
{"title":"EVALUATION OF NOMENCLATURE OF MACHINE PARTS, THAT DETERMINE RESOURCE","authors":"Viacheslav Bantkovskiy, S. Luzan","doi":"10.20998/2079-0775.2022.1.06","DOIUrl":"https://doi.org/10.20998/2079-0775.2022.1.06","url":null,"abstract":"The development of machine designs occurs with a constant desire to increase their productivity, which is almost always accompanied by an increase in the mechanical and thermal tension of the movable joints of parts. At the same time, the tasks of achieving high reliability and durability of the machine, reducing its weight, reducing the consumption of scarce materials are set. Based on a comprehensive assessment of automotive parts that determine the resource, it was found that abrasive wear prevails over all other types of wear. About 83% of automotive parts have wear up to 0.6 mm. When interacting with the soil, the working bodies of tillage and planting machines are subjected to intense abrasive wear. In addition, the working bodies of agricultural machines are operated in a chemically abrasive environment, which is associated with the addition of various fertilizers to the soil and the presence of moisture in it. Together, these factors have such a strong influence on the working bodies of agricultural machines, which makes them unusable after almost several hours of intensive work. Currently, in Ukraine, the following working bodies of tillage machines are used for tillage in agriculture: ploughshares, pointed and one-sided cultivator paws, various coulter designs, harrow discs, husker discs, baking powder, etc. In the soil environment, the working bodies are subject to intense abrasive wear. Typical representatives of the working bodies of tillage machines with cutting elements are the paws of cultivators designed for loosening, destroying weeds and mixing soil particles. The analysis of methods and methods of restoration of machine parts used at the enterprises of the agro-industrial complex showed that more than 60% of the parts are restored by surfacing and gas thermal spraying.\u0000Keywords: resource, repair, restoration, surfacing, thermal spraying, wear, durability","PeriodicalId":348363,"journal":{"name":"Bulletin of the National Technical University «KhPI» Series: Engineering and CAD","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125490304","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 : 2022-12-28DOI: 10.20998/2079-0775.2022.2.08
M. Tkachuk, A. Grabovskiy, Mykola Prokopenko, O. Shut, N. Pinchuk, M. Tkachuk, I. Klochkov, Andrii Lipeiko, Heorgii Tsendra, Andriy Shevchenko, A. Koba
In the work, theoretical foundations of behavior analysis of elastic bushings of modern engines high-speed elements under load were created. Several variation settings are offered. The first one of them is based on the model of a thin ring. The second model is formed on a flat setting. The third model is a three-dimensional formulation of the contact problem. It was established that during radial force loading, uneven deformation of the elastic intermediate ring occurs. At the same time, the contact zones gradually change their location in the direction of the radial force. The dependence of the radial displacement on the loading force is significantly nonlinear. It was established that the static characteristic of an elastic ring has a complex form. Unlike the traditional linear characteristic, it consists of three sections. The first one corresponds to a zero reaction to the action of the load. The second is a linear part. The third is a tough section. Thus, new formulations of the problem of determining the stress-strain state of an elastic intermediate ring, taking into account the contact interaction, have been developed. This forms, in contrast to traditional linear, significantly nonlinear models of the stress-strain state. They are more adequate and take into account factors that were not taken into account before. In particular, the clearances, tension and contact in the coupling of the elastic intermediate ring with other parts of the structure of the support of the rotor system are taken into account. Keywords: high-speed element, elastic bushing, support, critical rotational speeds, air blower, internal combustion engine
{"title":"RIGID PROPERTIES OF ELASTIC BUSHINGS OF ENGINES HIGH SPEED ELEMENTS","authors":"M. Tkachuk, A. Grabovskiy, Mykola Prokopenko, O. Shut, N. Pinchuk, M. Tkachuk, I. Klochkov, Andrii Lipeiko, Heorgii Tsendra, Andriy Shevchenko, A. Koba","doi":"10.20998/2079-0775.2022.2.08","DOIUrl":"https://doi.org/10.20998/2079-0775.2022.2.08","url":null,"abstract":"In the work, theoretical foundations of behavior analysis of elastic bushings of modern engines high-speed elements under load were created. Several variation settings are offered. The first one of them is based on the model of a thin ring. The second model is formed on a flat setting. The third model is a three-dimensional formulation of the contact problem. It was established that during radial force loading, uneven deformation of the elastic intermediate ring occurs. At the same time, the contact zones gradually change their location in the direction of the radial force. The dependence of the radial displacement on the loading force is significantly nonlinear. It was established that the static characteristic of an elastic ring has a complex form. Unlike the traditional linear characteristic, it consists of three sections. The first one corresponds to a zero reaction to the action of the load. The second is a linear part. The third is a tough section. Thus, new formulations of the problem of determining the stress-strain state of an elastic intermediate ring, taking into account the contact interaction, have been developed. This forms, in contrast to traditional linear, significantly nonlinear models of the stress-strain state. They are more adequate and take into account factors that were not taken into account before. In particular, the clearances, tension and contact in the coupling of the elastic intermediate ring with other parts of the structure of the support of the rotor system are taken into account.\u0000Keywords: high-speed element, elastic bushing, support, critical rotational speeds, air blower, internal combustion engine","PeriodicalId":348363,"journal":{"name":"Bulletin of the National Technical University «KhPI» Series: Engineering and CAD","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130999708","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 : 2022-12-28DOI: 10.20998/2079-0775.2022.2.02
A. Gaydamaka, Hennadii Kulyk, Yuri Muzykin, D. Borodin
This paper reports the location of stress concentration and compares the results obtained by theoretical analysis with the analysis done by the analysis software. In order to avoid economic losses of production due to stoppages related to repair work, there is a need to study the development of measures to increase their reliability. Despite knowing the importance of this a very little research work has been reported in this field. An appropriate analysis of the literature was carried out in order to find directions for improving methods performance of keyed joints. The paper analyzes the features of the work of the most common non-stressed connections prismatic keys. Analysis of the state of operation of non-stressed keyed joints, directions for improving their designs, and modern simplified method of calculation explains the relevance of studies of workability and reliability improvement. Ways have been considered to increase the reliability of connections with prismatic keys. In this work, a review of some of the latest, most interesting, by the author's opinion, is carried out, studies on the contact interaction of parts. The requirements for the development and research of new keyed joints are formulated. The basic design of the connection with cylindrical working surfaces of the key is adopted. Known methods of determination are analyzed contact deformations by various scientific schools. The requirements for the development of the method of calculating unstressed keyways are formulated connections. All our calculations were primarily made based on the method of the Scientific School of Volgograd State Technical University and it was adopted as the basic one. Key words: non-stressed keyed connections, unstressed keyed connections, reliability, keyway connection with a cylindrical segment, contact deformation, destruction, improvement of the design, self-locking of the key, fracture
{"title":"THE PROBLEM OF PRODUCTIVITY INCREASE OF THE UNSTRESSED KEYWAYS JOINTS","authors":"A. Gaydamaka, Hennadii Kulyk, Yuri Muzykin, D. Borodin","doi":"10.20998/2079-0775.2022.2.02","DOIUrl":"https://doi.org/10.20998/2079-0775.2022.2.02","url":null,"abstract":"This paper reports the location of stress concentration and compares the results obtained by theoretical analysis with the analysis done by the analysis software. In order to avoid economic losses of production due to stoppages related to repair work, there is a need to study the development of measures to increase their reliability. Despite knowing the importance of this a very little research work has been reported in this field. An appropriate analysis of the literature was carried out in order to find directions for improving methods performance of keyed joints. The paper analyzes the features of the work of the most common non-stressed connections prismatic keys. Analysis of the state of operation of non-stressed keyed joints, directions for improving their designs, and modern simplified method of calculation explains the relevance of studies of workability and reliability improvement. Ways have been considered to increase the reliability of connections with prismatic keys. In this work, a review of some of the latest, most interesting, by the author's opinion, is carried out, studies on the contact interaction of parts. The requirements for the development and research of new keyed joints are formulated. The basic design of the connection with cylindrical working surfaces of the key is adopted. Known methods of determination are analyzed contact deformations by various scientific schools. The requirements for the development of the method of calculating unstressed keyways are formulated connections. All our calculations were primarily made based on the method of the Scientific School of Volgograd State Technical University and it was adopted as the basic one.\u0000Key words: non-stressed keyed connections, unstressed keyed connections, reliability, keyway connection with a cylindrical segment, contact deformation, destruction, improvement of the design, self-locking of the key, fracture","PeriodicalId":348363,"journal":{"name":"Bulletin of the National Technical University «KhPI» Series: Engineering and CAD","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120969037","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 : 2022-12-28DOI: 10.20998/2079-0775.2022.2.10
M. Tkachuk, N. Pinchuk, Ganna Tkachuk, I. Klochkov, M. Tkachuk, Volodymyr Sіerykov, A. Grabovskiy, I. Hrechka, S. Kutsenko, Ganna Cymbal, Andrii Koba
The paper contains generalization and development of approaches, models and research methods for contact interaction of complex shaped bodies. In the case of contact along the surfaces of a close shape there are a number of problems. Firstly, analytical methods are not universally applied. Secondly, with a small gap between the surfaces of the contacting bodies the contribution of the deformation of the intermediate and surface layers to the balance of displacements becomes substantial. Thirdly, the application of traditional numerical methods also sharply increases the contribution of errors in contact surface shape approximation. All these factors bring on the need to develop new approaches, models and methods for the analysis of contact interaction of complex shaped bodies. For this purpose, the apparatus of the theory of variational inequalities is applied to deliver Kalker’s variational principle. In addition, a new principle for deriving multiple models of contact interaction of complex shaped bodies has been developed. It consists in gradually increasing the number of physical factors that are taken into account when building these models. This makes it possible to form a sequence of varied parametric models by taking into account new factors while naturally avoiding conflict situations. Furthermore it ensures inheritance in the sequence of models of different levels. The proposed improved approaches, models and methods are illustrated by the case study of the contact interaction of bodies with the intermediate layers located between them. Keywords: contact interaction, complex shaped body, finite element method, boundary element method, Kalker’s variational principle, variational inequalities
{"title":"NEW PHYSICAL FACTORS IN CONTACT INTERACTION OF ELASTIC BODIES OVER CLOSELY MATCHED SURFACES","authors":"M. Tkachuk, N. Pinchuk, Ganna Tkachuk, I. Klochkov, M. Tkachuk, Volodymyr Sіerykov, A. Grabovskiy, I. Hrechka, S. Kutsenko, Ganna Cymbal, Andrii Koba","doi":"10.20998/2079-0775.2022.2.10","DOIUrl":"https://doi.org/10.20998/2079-0775.2022.2.10","url":null,"abstract":"The paper contains generalization and development of approaches, models and research methods for contact interaction of complex shaped bodies. In the case of contact along the surfaces of a close shape there are a number of problems. Firstly, analytical methods are not universally applied. Secondly, with a small gap between the surfaces of the contacting bodies the contribution of the deformation of the intermediate and surface layers to the balance of displacements becomes substantial. Thirdly, the application of traditional numerical methods also sharply increases the contribution of errors in contact surface shape approximation. All these factors bring on the need to develop new approaches, models and methods for the analysis of contact interaction of complex shaped bodies. For this purpose, the apparatus of the theory of variational inequalities is applied to deliver Kalker’s variational principle. In addition, a new principle for deriving multiple models of contact interaction of complex shaped bodies has been developed. It consists in gradually increasing the number of physical factors that are taken into account when building these models. This makes it possible to form a sequence of varied parametric models by taking into account new factors while naturally avoiding conflict situations. Furthermore it ensures inheritance in the sequence of models of different levels. The proposed improved approaches, models and methods are illustrated by the case study of the contact interaction of bodies with the intermediate layers located between them.\u0000Keywords: contact interaction, complex shaped body, finite element method, boundary element method, Kalker’s variational principle, variational inequalities","PeriodicalId":348363,"journal":{"name":"Bulletin of the National Technical University «KhPI» Series: Engineering and CAD","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134455681","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 : 2022-12-28DOI: 10.20998/2079-0775.2022.2.01
O. Bondarenko, O. Ustynenko, R. Protasov, I. Klochkov, Borys Vorontsov Borys, Mykola Matyushenko, Pavlo Kalinin
Modern trends in the optimal and rational design of technical objects cross a large number of directions of their implementation. One of the interesting and promising directions is genetic and evolutionary algorithms (GА and EA). Authors promote the use of GА and EA as a tool for solving problems of optimal and rational design of complex mechanical systems. The relevance of highlighting modern methods, approaches and strategies for the implementation of GА and EA is described, as well as consideration of their applied implementation, which makes it possible to identify interesting directions of research that, with further adaptation or modifications, can be used to solve the problems of optimal and rational design of gearboxes, boxes gears and transmissions. The main general directions of the literature on GА and EA are highlighted, as well as the practical use of GА and EA in: technical and technological activities, physics, construction, water systems, nanotechnologies, analytical and simulation modeling, electrical and electronic systems, modeling of artificial intelligence and neural networks, information technologies, economic theory, administration and management, marketing, sociology, biology and medicine. This made it possible to understand the course of scientific thought on this issue, to determine the advantages and disadvantages of existing directions and approaches, and helped to choose the vector of further scientific thought, to decide on interesting approaches, strategies and methods. Considering certain features of EA, the authors prefer them. And in terms of strategies, hybridization with other methods, maximum saturation of all stages with "randomness" and the possibility of learning (memory organization) of the algorithm similar to neural networks are promising. Keywords: optimal design, research directions, genetic algorithms, evolutionary algorithms
{"title":"REVIEW OF MODERN USE OF GENETIC AND EVOLUTIONARY ALGORITHMS. STRATEGIES, POSSIBILITIES (REVIEW ARTICLE)","authors":"O. Bondarenko, O. Ustynenko, R. Protasov, I. Klochkov, Borys Vorontsov Borys, Mykola Matyushenko, Pavlo Kalinin","doi":"10.20998/2079-0775.2022.2.01","DOIUrl":"https://doi.org/10.20998/2079-0775.2022.2.01","url":null,"abstract":"Modern trends in the optimal and rational design of technical objects cross a large number of directions of their implementation. One of the interesting and promising directions is genetic and evolutionary algorithms (GА and EA). Authors promote the use of GА and EA as a tool for solving problems of optimal and rational design of complex mechanical systems. The relevance of highlighting modern methods, approaches and strategies for the implementation of GА and EA is described, as well as consideration of their applied implementation, which makes it possible to identify interesting directions of research that, with further adaptation or modifications, can be used to solve the problems of optimal and rational design of gearboxes, boxes gears and transmissions. The main general directions of the literature on GА and EA are highlighted, as well as the practical use of GА and EA in: technical and technological activities, physics, construction, water systems, nanotechnologies, analytical and simulation modeling, electrical and electronic systems, modeling of artificial intelligence and neural networks, information technologies, economic theory, administration and management, marketing, sociology, biology and medicine. This made it possible to understand the course of scientific thought on this issue, to determine the advantages and disadvantages of existing directions and approaches, and helped to choose the vector of further scientific thought, to decide on interesting approaches, strategies and methods. Considering certain features of EA, the authors prefer them. And in terms of strategies, hybridization with other methods, maximum saturation of all stages with \"randomness\" and the possibility of learning (memory organization) of the algorithm similar to neural networks are promising.\u0000Keywords: optimal design, research directions, genetic algorithms, evolutionary algorithms","PeriodicalId":348363,"journal":{"name":"Bulletin of the National Technical University «KhPI» Series: Engineering and CAD","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127509249","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 : 2022-12-28DOI: 10.20998/2079-0775.2022.1.01
O. Bondarenko, O. Ustynenko
Modern requirements for the design process of any technical object are very strict. Focus and independence, reduction of time for the process itself, maximum automation of the process, complexity - all these are integral characteristics of modern design. Therefore, approaches to the optimal design of technical systems are quite widespread. For technical objects, it is advisable to use the term optimal-rational design. In this paper, mechanical step transmissions are considered. It should be noted that mechanical step transmissions is the most common type and covers all classes of vehicles, from light vehicles, through trucks, to military vehicles and special-purpose equipment. This prevalence has led to a wide range of layout schemes and different aggregate-saturation. These aspects led engineers to formulate a number of specific requirements for mechanical step transmissions, which resulted in certain quality characteristics - criteria and use various concepts, techniques and design approaches. For the authors, it is mechanical step transmissions of wheeled vehicles that is of interest, as the big segment of transport equipment. Thus, the description of methods, approaches and directions to the optimal-rational design mechanical step transmissions wheeled vehicles is an urgent task that will reveal the "blank spots" of this issue, determine the advantages and disadvantages of existing areas and help to choose a vector of further scientific thought and determine the approaches and methods to optimal-rational design mechanical step transmissions wheeled vehicles. Several general directions of mechanical step transmissions wheeled vehicles design are highlighted: the choice of transmission parameters, taking into account the dynamics of torsional vibrations, rational distribution of torque between the drive wheels, power distribution in the transmission, selection of rational shift phases, etc. The main objects of research and common methods for solving design problems are described. A graphical representation of the presented material is provided, which allows you to quickly navigate the issue, and, if necessary, modify existing or synthesize new tasks. Keywords: transmission, optimal design, research directions
{"title":"MAIN TRENDS AND DIRECTIONS IN THE OPTIMAL DESIGN OF WHEEL MACHINE TRANSMISSIONS (REVIEW ARTICLE)","authors":"O. Bondarenko, O. Ustynenko","doi":"10.20998/2079-0775.2022.1.01","DOIUrl":"https://doi.org/10.20998/2079-0775.2022.1.01","url":null,"abstract":"Modern requirements for the design process of any technical object are very strict. Focus and independence, reduction of time for the process itself, maximum automation of the process, complexity - all these are integral characteristics of modern design. Therefore, approaches to the optimal design of technical systems are quite widespread. For technical objects, it is advisable to use the term optimal-rational design. In this paper, mechanical step transmissions are considered. It should be noted that mechanical step transmissions is the most common type and covers all classes of vehicles, from light vehicles, through trucks, to military vehicles and special-purpose equipment. This prevalence has led to a wide range of layout schemes and different aggregate-saturation. These aspects led engineers to formulate a number of specific requirements for mechanical step transmissions, which resulted in certain quality characteristics - criteria and use various concepts, techniques and design approaches. For the authors, it is mechanical step transmissions of wheeled vehicles that is of interest, as the big segment of transport equipment. Thus, the description of methods, approaches and directions to the optimal-rational design mechanical step transmissions wheeled vehicles is an urgent task that will reveal the \"blank spots\" of this issue, determine the advantages and disadvantages of existing areas and help to choose a vector of further scientific thought and determine the approaches and methods to optimal-rational design mechanical step transmissions wheeled vehicles. Several general directions of mechanical step transmissions wheeled vehicles design are highlighted: the choice of transmission parameters, taking into account the dynamics of torsional vibrations, rational distribution of torque between the drive wheels, power distribution in the transmission, selection of rational shift phases, etc. The main objects of research and common methods for solving design problems are described. A graphical representation of the presented material is provided, which allows you to quickly navigate the issue, and, if necessary, modify existing or synthesize new tasks.\u0000Keywords: transmission, optimal design, research directions","PeriodicalId":348363,"journal":{"name":"Bulletin of the National Technical University «KhPI» Series: Engineering and CAD","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129992110","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：