Vibrations in engineering and technology最新文献

{"title":"RESEARCH OF THE WORKING PROCESS OF THE CLEANING SYSTEM OF MACHINES FOR HARVESTING ROOT CROPS","authors":"O. Trukhanska","doi":"10.37128/2306-8744-2022-1-13","DOIUrl":"https://doi.org/10.37128/2306-8744-2022-1-13","url":null,"abstract":"Conducted the theoretical and experimental studies of the combined cleaning system functioning process by analyzing the motion of fodder beet through the working surfaces of feeding conveyor and auger installed above it. We have got analytical and empirical process model of fodder beet oblique sub-hiton the augerturn that characterize the dependence of the total rate of sub-hit coefficient of technological interaction of roots and depth of root damage on the main parameters of combined cleaning system. We found out the rational limits of basic structural and kinematic parameters of combined cleaning system by providedminimum offodder beet damage.\u0000\u0000Particular importance for improving the design and technological level and individual working bodies of the combined cleaning system should be given to issues of general engineering problems of machine design: improvement of working bodies and other structural elements of the combined cleaning system based on a deeper analysis of physical and mechanical properties of roots. Characteristics of fodder beets, as an element of the system \"machine-working body-root crop\", must be considered as a set of different mechanical qualities and parameters that are decisive in the total mechanical action on the object, their allowable level and range of structural and kinematic parameters of workers bodies. When optimizing the parameters of transport and technological systems of the root of the harvesting machine, which have working bodies of screw mechanisms, at the stage of their design it is advisable to first build a mathematical model of the technological process of root cleaning system parameters.","PeriodicalId":171295,"journal":{"name":"Vibrations in engineering and technology","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131001556","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}

{"title":"ELABORATION AND RESEARCHES OF APPARATUS OF CONTROL FOR HYDROPONIC INSTALLATIONS","authors":"I. Sevostianov, O. Melnik","doi":"10.37128/2306-8744-2022-1-7","DOIUrl":"https://doi.org/10.37128/2306-8744-2022-1-7","url":null,"abstract":"Introduction of hydroponic installations is a prospective direction of agriculture, while they allow to get all-the-year-round fresh vegetables, fruits and greenery, including their exotic kinds for some regions. For provision of high efficiency of this equipment (minimal expenses of energy, materials and time, maximal productivity of the plants) there is important to supply the plants with optimal quantity of nutrients (nitrogen, potassium, sulfur, calcium, magnesium, phosphorus, natrium), microelements (iron, boron, iodine, copper, zinc, cobalt, molybdenum, manganese), acids, salts. Herewith concentration of some from these additives can amount several milligrammes. So, an actual task is an accurate batching of the components of nutrients. There are several variants of an equipment for the accurate batching of liquid solutions: valves with electric control for feeding of fuel in jet engines (they have high price because of utilization of expensive materials in their construction), hydraulic engines with periodic turns of executive element for angle less than 360o (don’t provide exact regulation of turning angle) and linear electric-hydraulic engines (have other designation and design that demands of improvement). Authors propose a scheme of improved apparatus for accurate batching of the components of nutrients hydroponic installations, created at the base of the linear electric-hydraulic engine. The apparatus has a simple and reliable design and provides a possibility of high accurate batching of the components of nutrients. There are cited equations and formulas for definition of main working parameters of the apparatus, that can be used for creation of its method of design calculation.","PeriodicalId":171295,"journal":{"name":"Vibrations in engineering and technology","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134398446","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}

{"title":"SIMULATION OF FATIGUE CRACK GROWTH DURING TRANSVERSE VIBRATIONS OF A TURBINE SHAFT","authors":"A. Bovsunovsky, O. Nosal","doi":"10.37128/2306-8744-2022-1-8","DOIUrl":"https://doi.org/10.37128/2306-8744-2022-1-8","url":null,"abstract":"In real operational conditions structural elements of steam turbines are subjected to a wide range of thermal and mechanical loading. Even substantial reserve of static and dynamic strength, laid down at the stage of turbine design, can not prevent the appearance of fatigue cracks in structural elements, which lead to catastrophic failures. One of the reasons of damage in structural elements of turbine is technological operations used in the process of manufacture (forging, turning, and milling, heat treatment), since they are accompanied with plastic deformation of material, which is the physical basis of the so-called distributed fatigue damage. It accumulates during long-term cyclic deformation and turns into local damage of a fatigue crack type. In addition, the appearance of cracks in turbine shafts is caused by complex geometry, that is, by the presence of fillets and grooves, which are stress concentrators and, therefore, potential areas of initiation and growth of fatigue cracks. The high pressure rotor of the K-200-130 steam turbine was used to simulate the process of crack growth at forced transverse vibrations of the rotor when it passes through the first critical speed. At this the amplitude-dependent energy dissipation typical for metallic materials was taken into account. There was estimated the maximum stresses arising in the rotor when it passed through the critical speed rotation and the number of loading cycles leading to the crack growth. It was assumed that a crack with a depth of about 1 mm has formed on the surface of the rotor, which is the maximum permissible depth according to the instructions for safe operation of the turbine. The growth rate of this crack is predicted based on the fracture mechanics approaches through the determined maximum stresses in the section with a crack and experimental dependences of the crack growth rate on the stress intensity factor range. Based on the model, the crack growth time is predicted until the rotor loses its bearing ability. Predictions are made for different scenarios of loading and mechanical properties of rotor steel.","PeriodicalId":171295,"journal":{"name":"Vibrations in engineering and technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129922178","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}

{"title":"DEVELOPMENT OF ALGORITHMIC SUPPORT FOR PRACTICAL IMPLEMENTATION OF TESTING AND DIAGNOSTIC COMPLEX OF CNC MACHINES","authors":"N. Veselovska","doi":"10.37128/2306-8744-2022-1-9","DOIUrl":"https://doi.org/10.37128/2306-8744-2022-1-9","url":null,"abstract":"CNC machines, including multi-purpose machines (product processing centers), have been widely used in connection with the creation of flexible production systems and significant progress in developing and improving the reliability of multi-purpose freely programmable, multiprocessor and small numerical program control devices (CNC) , so the development of algorithmic software for the practical implementation of the test and diagnostic complex and the use of diagnostic systems as a means of automation of information technology is one of the general directions of improving the efficiency of machine-building enterprises. However, in order to make decisions about the scope, stages and feasibility of using a particular diagnostic system for the selected object of study at a particular enterprise, it is necessary to assess its expected benefits.\u0000\u0000The use of diagnostics during operation of the machine imposes its influence on the means and methods of diagnosis, which should be convenient for use in the factory, to ensure the diagnosis process in the shortest time, to have reliable readings, especially with high requirements for product reliability. and in some cases without disrupting the mechanism, to be economically feasible.\u0000\u0000The design of the machine is adapted to the needs of diagnostics and must: have built-in devices that evaluate its parameters (pressure in the hydraulic system, temperature of energy-intensive units, accuracy of machining, speed); periodically connect to special equipment that will diagnose the basic parameters of the machine and provide data on its condition. The parameters of the technical condition (diagnostic features), which can be judged on the OD and which are diagnosed during operation of the machine, are: machine parameters that directly characterize its efficiency; damage and defects that occur during operation and lead or may lead to failure; side effects that are functionally or stochastically related to the initial parameters.","PeriodicalId":171295,"journal":{"name":"Vibrations in engineering and technology","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125272708","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}

{"title":"MODERNIZATION OF EQUIPMENT FOR PRODUCTION OF CHEESE PRODUCT","authors":"Yurii Polievoda, A. Solomon, M. Bondar","doi":"10.37128/2306-8744-2022-1-15","DOIUrl":"https://doi.org/10.37128/2306-8744-2022-1-15","url":null,"abstract":"The article substantiates the modernization of the apparatus for melting cheese masses, which differs in the method of heat supply of working tanks by replacing the steam jacket for heating with a flexible film resistive electric heater of the radiating type (GPREnVT). The heat transfer surface of the working tank is increased in the apparatus due to the heating of the mixing device. The advanced installation is characterized by the use of secondary thermal energy of melting of cheese masses (35… 95°C) by converting its Peltier elements into low-voltage supply voltage of autonomous fans (3.5…12 W) to cool the control unit. This will increase the efficiency of the proposed design, due to the reduction of dimensional and weight parameters of the apparatus for melting cheese masses by replacing the steam method of heating with electric.\u0000\u0000The reduction of the duration of the equipment output to the stationary mode (85 ° С) during melting of cheese masses was experimentally confirmed: for the bowl of the research apparatus - 575 s, in comparison with the analogue – 725 s. This scientific work confirms the reduction of the duration of entering the stationary mode by 2% compared to the basic device B6-OPE-400.\u0000\u0000It is proved that the main indicator of resource efficiency of specific energy consumption for heating the volume of a unit of product has decreased 1.2 times. In the modernized apparatus for melting cheese masses, it is equal to 3037,2 kJ/kg, and the indicator of the basic version B6-OPE-400 – 3672.5 kJ/kg. According to the obtained results, there is an increase in resource efficiency, which is achieved by: elimination of steam heating networks; increasing the heat transfer surface of the working bowls by heating the stirrer with a flexible film resistive electric heater of the radiating type. Heat dissipation of the heater improves the performance of the temperature stabilization system in the bowl of the cheese melter. The obtained results can be used in the design of thermal equipment with electric heating in the use of secondary thermal energy.","PeriodicalId":171295,"journal":{"name":"Vibrations in engineering and technology","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128578932","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}

{"title":"SUBSTANTIATION OF AMPLITUDE-FREQUENCY CHARACTERISTICS AND DESIGN PARAMETERS OF THE SEPARATOR WITH A VIBRATION DRIVE","authors":"O. Omelyanov, O. Tokarchuk","doi":"10.37128/2306-8744-2022-1-4","DOIUrl":"https://doi.org/10.37128/2306-8744-2022-1-4","url":null,"abstract":"The main effects of the broken design of the vibrating separator are: increased crushing force in the process of separating the slurry mass in this robot, which was moved by a path on the working container with a sieve of the conical shape of the vibrating ruh; a plethora of minds passing through a lot of products through the opening that they reached for the rahunka of the sieve surface of the bulk coliving; Changes in energy consumption and increase in the minds of robotic support units during the operation of the projected vibrating separator, which have been achieved by the addition of additional spring elements between the separator housing and bearing units of the vertical drive shaft of the vibration separator. The application of the proponated vibrating screen to the working organs of the volumetric kolivalny roar allows to increase the productivity and capacity of the process of distributing solid-state husky masses. To determine the rational parameters in the process of vibrating sieving, we took away the ratio of the rot of the victorious organs at the end of the sieve surface when victorious to the Lagrange method of the 2nd genus. When zastosuvanni Cauchy solutions for linear non-homogeneous differential lines, the remainder of the rozvnіz was eliminated. Removing the fallowness of the amplitude of the crushing, the vibratory characteristics and the vibration acceleration, the intensity of the crushing movement made it possible to carry out a mathematical analysis of the power and energy characteristics of the vibrodrive of the finished separator. The expansion of the conical sieve surface allows you to create expanses of gyration or colossal progressive movement, which allows you to realize the importance of a large separation of dry masses. The results of the analytical investigation made it possible to prime the optimal cut to the working sieve surface. On the basis of the analysis carried out, the grounding and clarification of the design parameters of the vibratory system were presented and the design of this technical system was presented.","PeriodicalId":171295,"journal":{"name":"Vibrations in engineering and technology","volume":"170 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124138679","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}

{"title":"EVALUATION OF DEFORMABILITY OF MATERIAL OF PREPARATIONS IN DIRECT AND REVERSE EXTRACTION BY ROLLING STAMPING METHOD","authors":"V. Matviychuk, V. Mikhalevich, M. Kolisnyk","doi":"10.37128/2306-8744-2022-1-10","DOIUrl":"https://doi.org/10.37128/2306-8744-2022-1-10","url":null,"abstract":"The article presents the results of development and research of various technological schemes of the process of stamping by rolling cylindrical and conical rolls to obtain complex profile workpieces. It is shown that the achievement of significant dimensions of the various elements of the workpiece is possible by providing a directed flow of metal by changing the relative position of the roll and the workpiece. The most effective rolling operations are landing, settling, unloading, reverse and direct extrusion. The paper focuses on the analysis of operations of reverse and direct extrusion to obtain complex profile blanks with developed, including thin-walled elements. Since the technological capabilities depend on the deformability of the material, the analysis of the stress-strain state of the workpieces was performed using the method of grids, hardness measurement and microstructural analysis. The main result of the analysis was the construction of ways to deform the particles of the workpiece material in the coordinates \"deformation intensity - stress index\". Zones of blanks that are deformed in the conditions of \"rigid\" stress state are established, therefore for these zones the deformability of metals was assessed using the criteria of phenomenological theory. In addition, the assessment of deformability was also performed for areas with the maximum degree of deformation of the material. The manufacture of thin-walled elements of the workpiece, using the operation of reverse extrusion, is accompanied by the appearance of significant contact stresses. To prevent the roll from being pushed out of the workpiece and forming elements with a constant thickness, support rollers should be provided. In the case of direct extrusion, the increase in contact stresses requires the application of additional measures to increase the strength of the tool.","PeriodicalId":171295,"journal":{"name":"Vibrations in engineering and technology","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133938831","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}

{"title":"ELABORATION AND RESEARCHES OF A VIBRO-PRESS FOR DEHYDRATION OF DAMP DISPERSIVE MATERIALS","authors":"I. Sevostianov, Yaroslav Ivanchuck","doi":"10.37128/2306-8744-2022-1-1","DOIUrl":"https://doi.org/10.37128/2306-8744-2022-1-1","url":null,"abstract":"Vibro-pressing loading is one from most effective methods of dehydration of damp dispersive materials such as alcoholic bard, beer pellets, beet press, coffee and barley slime for their further use as valuable additives to agricultural fodders or as a fuel. Main efficiency characteristics of the equipment for dehydration by the method of vibro-pressing loading are: productivity of liquid removal up to 20 ÷ 25 t / h, energy efficiency 2,7 ÷ 3,2 kW / t, final humidity of processed material 20 ÷ 25%. High efficiency of the method conditioned by periodical overdistribution of solid particles of processed material in a press-form of the equipment with their mutual rotations, sliding and movements in locations of more stable balance, with more dense stacking of particles and removal of liquid from spaces between them. There are several types of drives for vibro-pressing equipment: mechanical (unbalanced), hydraulic and electromagnetic. Each this type of drives has some advantages and disadvantages. One of tasks of this article is to analyze these types of drive and to select an optimal variant that will provide maximal productivity of working process, minimal energy expenses and humidity of processed material. A scheme of a versatile vibro-press that can be equipped with unbalanced, hydraulic pulse or electromagnetic drive is presented in the article. There is elaborated dynamic and mathematic models of the vibro-press. Equations of the mathematic model set connection between of working parameters of dehydration process, design parameters of the equipment and physical-mechanical characteristics of processed material. These equations can be used as a foundation for elaboration of a design calculation method for determination of optimal parameters of the vibro-press depending from given characteristics of material and parameters of dehydration efficiency.","PeriodicalId":171295,"journal":{"name":"Vibrations in engineering and technology","volume":"11 3-4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134077548","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}

{"title":"BACKGROUND OF A MATHEMATICAL MODEL DEVELOPMENT OF PUMPKIN SEEDS MOTION IN A VIBRATION DRYER","authors":"O. Tsurkan","doi":"10.37128/2306-8744-2022-1-2","DOIUrl":"https://doi.org/10.37128/2306-8744-2022-1-2","url":null,"abstract":"Pumpkin seeds have special physical, mechanical and thermophysical characteristics, which significantly complicate the process of their post-harvest processing. It is because of the adhesion of seeds to the working bodies, the formation of conglomerates and other features of pumpkin seeds, it is recommended to use dryers with vibration activation of the material layer. This process is a complex system with a large number of elements (and, accordingly, a large number of connections between them), external influences on the system, etc. For a successful solution to the task of developing a mathematical model, it is necessary to conduct a critical analysis of existing models in order, taking into account the research carried out, to develop their own model describing the process of behavior of material particles (pumpkin seeds) within the vibrating chamber.\u0000\u0000An analysis of the latest publications on this issue shows that in most cases the issues of processing a certain material in specific technological conditions were solved. In this study, an attempt is made to generalize the previous experience for the development of our own mathematical model of the process of vibration drying of pumpkin seeds.\u0000\u0000Several types of models of the movement of a granular medium under the action of vibration over the surface of the working bodies were considered. Models of a single particle with added mass were considered, including, taking into account aerodynamic drag, elastic-visco-plastic models of a layer of a granular medium, a model that considers a granular material as a system divided by horizontal planes into an infinite number of elementary layers with the possibility of movement of such layers relative to each other and some others.\u0000\u0000Of all the considered models of the grain (seed) layer, the most promising in our opinion is the model of the behavior of a granular medium under the influence of vibration, which is represented as a viscous medium, taking into account the initial shear stress. On the basis of this model, it is possible to simulate all states of a granular medium under the influence of vibration: calmness, regular and unstable motions, studied experimentally, as well as to use the equation of dynamics of motion of a continuous medium, the equation of continuity and the equation of the relationship between stresses and deformations for a viscoplastic medium, which means the use of a well-developed mathematical apparatus of fluid dynamics, which is of great importance for obtaining practical results.","PeriodicalId":171295,"journal":{"name":"Vibrations in engineering and technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122652491","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}

{"title":"AUTOMATIC CONTROL OF THE ENERGY STATE OF THE WORKING LIQUID IN THE BIOREACTOR AT THE RESONANCE LEVEL","authors":"V. Melnyk, Vera Kosovа, Karina Zhukovska","doi":"10.37128/2306-8744-2021-4-5","DOIUrl":"https://doi.org/10.37128/2306-8744-2021-4-5","url":null,"abstract":"The absence of mechanical mixing devices and perfect heat and mass transfer and intensive aeration of the working fluid significantly increase the productivity and quality of the technological process, which determines the relevance of the studied problem. The aim is to increase the productivity of the technological process, which is solved by intensifying heat and mass transfer throughout the apparatus by remote artificial formation of the resonant state of the culture medium and the energy activity of the working fluid generated by this state. The task of the work is the artificial formation of the energy activity of the working fluid in the bioreactor using an ultrasonic beam. The research methodology is based on classical methods of theoretical mechanics, methods of mathematical physics, theory of thin shells, which ensures the reliability and reliability of the results. One of the possible technical solutions of artificial formation of energy activity of the working fluid in the bioreactor by means of an ultrasonic beam is given. The conditions for the occurrence of wave coincidence, which is accompanied by a sharp increase in energy activity along with minimal dissipation of radiation waves, are outlined. The nature of additional energy activity in the zones of caustic surfaces by two types of waves is explained. The process of culturing organisms, like most heterogeneous chemical reactions, directly depends on the amount of gas dissolved in the liquid and the formation and accumulation of the target product, in particular biomass. Thus, increasing the degree of dissolution of the gas in the liquid phase of the reactions will reduce its consumption and reduce energy consumption for aeration. The constructed calculation schemes and the received results allow to estimate adequacy of theoretical decisions by initial assumptions and, thus, to confirm their expediency for the further practical realization. The spatial resonance created inside the housing by ultrasonic emitters turbulizes the entire liquid-phase component of the housing and causes the gas bubbles to move without hindrance not only upwards, but also in other various directions, keeping them longer in the working fluid, thus enriching the mixture. creating conditions for intensive cell growth.","PeriodicalId":171295,"journal":{"name":"Vibrations in engineering and technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130743076","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}