bluuebunny/crossref_metadata_2025_split huggingface dataset:
Optimization of composite wing spars for an unmanned aerial vehicle
Authors: Aung Naing Lin , Tatarnikov Oleg , Aung Phyo Wai 
Published: December 2020

Abstract
In this paper, the weight optimizing of an unmanned aerial vehicle wing spar was designed by using composite material. The optimization parameters were considered, respectively: the wing mass, the location of the spars and ribs, and the spars mass. Determined the selecting of wing spars locations for optimizing spars design based on the minimum weight of the wing. Layer optimizing was used to reduce the weight of composite wing spars. The thickness of front spar and rear spar element such as web and flange were optimized by criterion of allowable normal stress and deflection. The analysis of stress-strain state for all variants were carried out in the FEMAP software package. As the result of analysis, the total weights of composite wing spars reduced 18.17% than the original spars.
Analysis of power efficiency and agility of a combination vehicle with active semi-trailer by mathematical simulation
Authors: Byakov K E , Chudakov O I , Gorelov V A , Gartfelder V A 
Published: December 2020

Abstract
This article gives an estimate of power consumption at curves and the swept path width for a combination vehicle with steered and non-steered wheels of semi-trailer. Several options of power distribution between the combination vehicle sections are discussed.
Method of studying the dynamics of the controlled mechanical continuously variable transmission with an elastic element and one-way clutch
Authors: Derzhansky V B , Cherepanov S V , Volkov A A 
Published: December 2020

Abstract
In comparison with other types of transmissions currently used, mechanical continuously variable transmissions are capable of providing significant technical and economic advantages, which makes research in this area relevant. This paper presents a mechanical and mathematical method that allows for studying the dynamic processes that take place during operating a controlled mechanical continuously variable transmission with an elastic element and a one-way clutch which provides for transmitting torque to the driven shaft in one direction only.
Study of the dynamic behavior of rolling stock using a computer experiment
Authors: Kuzyshyn A , Batig A , Kostritsa S , Sobolevska J , Dovhaniuk S , Dzhus V 
Published: December 2020

Abstract
The authors of the article analyzed existing software systems that are used to study the dynamic behavior of rolling stock, and also emphasized the importance of using a computer experiment to implement this task. An improved spatial mathematical model of the dynamic behavior of a freight wagon when it interacts with a rail track is considered, and it is proposed to study it using an object-oriented approach using the Maple software package. To accomplish this task by writing procedures, separate modules (subprograms) were created that included differential equations of motion for the individual components of the object under study. Based on existing procedures, the main module was created, which reflected the sequence of performing certain functions (calling up the necessary information, especially the use of logic, methods for solving the problem, as well as visualizing the results). Using the created modules in the Maple software package, a computer experiment was used to study the dynamic behavior of a freight car when it interacted with a rail, and also showed the possibility of taking into account the influence of individual parameters of its technical condition on its dynamic behavior.
3D model to study transitional regimes of train motion
Authors: Markova O , Kovtun H , Maliy V 
Published: December 2020

AbstractWhen considering issues of increasing train speeds, it is necessary to conduct a preliminary assessment of the entire train dynamic characteristics and forces acting in the elements of cars and a locomotive, as well as in inter-car connections when driving at high speeds along a path of arbitrary shape in plan and profile, and also to consider emergency situations, which may take place during the motion. This in turn requires the development of reliable mathematical models simulating the train motion. The study of dynamic characteristics of railway rolling stock is associated with the consideration of vibrations of complex mechanical systems with a large number of degrees of freedom. The vibrations of cars in the train can be described either by one-dimensional or spatial model. The aim of this work is to show that for some studied cases the modelling of train motion by 3D models more accurately reflects the processes occurring in a moving train. Some results are discussed in the paper.
Study of the interaction of the railway track and the rolling stock under conditions of accelerated movement
Authors: Hubar O , Markul R , Tiutkin O , Andrieiev V , Arbuzov M , Kovalchuk O 
Published: December 2020

AbstractComprehensive studies of the interaction of the railway track and the investigated rolling stock under accelerated conditions have been carried out. The basis of the research was to obtain and substantiate the process of stress state, force interaction of the railway track and the rolling stock under conditions of accelerated movement. Introduction of the new rolling stock into continuous operation is a serious task that must be solved comprehensively. The implementation of this direction significantly affects the reliability of the elements of the railway track. Within the framework of the research, the approach was used that takes into account theoretical and experimental parts of the research using the methodology of prof. O. P. Yershkov. As a result of the studies, average stress values were established: in rails, they variate within the range 44.37…70.99 MPa; in the sleeper, they reach 0.78 MPa; in the ballast layer, they have 0.13 MPa; in the body of the subgrade, they reach 0.04 MPa, which is significantly less than the maxima allowable values. While speed change from 140 to 160 km/h, the values of the studied parameters decrease: vertical force (9.39 %), lateral forces (19.79 %); stresses in the edge of the rail flange (15.86 %); stresses in the edge of the rail head (16.67 %); stresses in the neck of the rail (8.74 %). The obtained results made it possible to form trends and recommendations on the feasibility of further increasing speeds development. At the same time, this made it possible to substantiate in more detail the operation of the railway track in the case of accelerated movement.
Research of dynamic indicators and influence of different types of rolling stock on railway track
Authors: Shvets A O , Bolotov O M , Percevoj A K , Ghlukhov V V , Bolotov O O , Saparova L S 
Published: December 2020

AbstractThe technical level of rolling stock of railway transport directly affects the economic indicators of the transport industry and the economy of the country as a whole, which leads to the need for improvement of the control, quantitative assessment of the dynamic loading o f rolling stock to ensure safe and reliable communication at the railways. Therefore, in the process of designing and operating the rolling stock the quantitative assessment of dynamic loadings is a relevant scientific and technical problem. The purpose of this work is to study the influence of different types of rolling stock, taking into account the speed of movement on their main dynamic indicators and indicators of interaction of track and rolling stock. The basis of the research is the method of mathematical and computer simulation of the dynamic loading of a freight car using the model of spatial variations of the coupling of five cars and a software complex developed in the branch research laboratory of dynamics and strength of rolling stock (BRL DSRS). Theoretical studies have been carried out under condition of movement of several types of freight cars: a gondola car of the model 12-532, a hopper car for coal transportation of the model 12-4034 and a flat car with a long cargo of the model 13-401 and typical bogies 18-100 with the speeds from 50 to 90 km/h in the curves with radii 350 and 600 m, with superelevation 130 and 120 mm, correspondingly.
Simulation of environmental pollution from diesel locomotive
Authors: Biliaiev M M , Rusakova T I , Kozachyna V A , Berlov O V , Poltoratska V M , Yakubovska Z M 
Published: December 2020

Abstract
Diesel locomotives are widely used at Ukrainian railway stations as maneuvering locomotives. Emissions from these diesel locomotives contain different toxic chemicals. It is important to understand air contamination patterns which are formed at railway stations. Understanding of these contamination patterns allows to evaluate the negative impact of diesel locomotive emissions on environment. To solve this problem it is necessary to use mathematical models which take into account the most important factors influencing formation of contamination zones. This paper introduces numerical model which allows to simulate pollutants dispersion from moving diesel locomotive. Developed numerical model is based on three dimensional equation of potential flow and three dimensional equation of pollutant dispersion. The model takes into account pollutants (NO, NO
2) chemical transformation. To solve three dimensional equation of potential flow the implicit difference scheme of splitting was used. To solve three dimensional equation of pollutant dispersion the implicit difference scheme of splitting was used. Euler method was used to solve numerically equations of pollutant chemical transformation. Developed numerical model allows to take into account influence of buildings at the railway station on the contamination zones formation. Developed model consumes not much computer time. Results of performed numerical experiment are presented.
Methods and results of evaluating the dual-power electric train crew elements service life
Authors: Horobets V , Sablin O , Fedorov E , Horobets E , Bolotov O , Jangulova O 
Published: December 2020

Abstract
The article assesses the long-term strength of the vibration damper assembly of a double power transmission of electric trains manufactured by «Hyundai-Rotem Company». The technique is described and the analysis of the service life of the elements of the chassis of the electric train is made. The presence and nature of micro cracks in the loaded elements of the vibration damper assembly was evaluated after a full cycle of vibration bench tests. The influence of vertical vibrations of the electric train body on the level of dynamic load and the service life of the bearing elements of the vibration damper assembly is considered. The service life of the vibration damper at the end of the service life has been estimated by comparing working hours and “statistical playback”. The calculation of the resource by the method of “statistical reproduction” confirms the possibility of operating the vibration damping module (second modernization) for 50 years from the date of construction. The influence of the vibration damper position on its dynamic loading is checked. The main stages and sequence of tests for estimation the resource of the longitudinal vibration damper module of a double-fed electric train are also considered, including methodological, calculated and experimental confirmation of the reliability and durability of the unit, which was studied as part of a comprehensive work.
Modernization of the buffer beam of PE2U traction unit electric locomotive
Authors: Bannikov D , Radkevich A , Muntian A 
Published: December 2020

Abstract
The article presents the main results of a theoretical study on the analysis of the stress-strain state of the construction of the buffer bar of the electric locomotive for the control of the traction unit PE2U. The estimation of the possibility and effectiveness of attachment on the front wall of the buffer beam of a special securing bracket was considered as a separate task. In both cases, the finite element method based on the SCAD for Windows computing system was used. As a result, it was found that in general, the design of the buffer beam does not meet the requirements of the current standards. Up to 5 zones of high stress concentration are present in the structure, which, given the long service life of the machines (up to 40-50 years), are potential places for the development of fatigue damage. In order to balance the stress level, we recommended to strengthen the contact zone of the supports under the automatic coupling with the system of horizontal truss plates. The additional recommendation is to reinforce the lower sheet of the buffer beam structure up to and including its replacement by a sheet of greater thickness. Attachment to the front wall of the buffer beam of a special securing bracket for holding in emergency mode the coupling of the locomotive-car is possible provided that this zone is strengthened by the system of additional truss plates. The total increase in the mass of the buffer beam reaches 350 kg (25 % of the original weight of the buffer beam structure).
Design optimization of magnetorheological brake using structural parameter: evaluation and validation
Authors: Patel S , Upadhyay R , Patel D 
Published: December 2020

Abstract
Magneto-rheological (MR) brake is one of the most promising smart systems, which transmit torque with the applied magnetic field. This process is reversible in the absence of magnetic field. In this paper, the most common disk type MR-Brake (MRB) design is selected to optimize for the desired range of torque transmission without changing the diameter of the MRB. The theoretical torque transmission equation is deduced and using that power index dependency is studied for each structural MRB parameter. Three structural parameters (outer radius of the disk, fluid gap, and coil width) are selected, for three levels and analysis has performed using Minitab software to understand percentage contribution of the structural parameters. Then by varying fluid gap and fixing the other two MRB parameters, FEMM analysis has performed to understand magnetic flux concentration at the fluid gap. After confirming the MRB design, MRB is developed having two different MR-fluid working gaps. Later, maximum torque transmission of the MRB having different MR-fluid working gaps are studied at applied current value. The experimental data confirms with theoretical calculation.
Design of multistage forging processes by numerical simulation and experimental verification
Authors: Ruban P , Jayaprakash J , Surendarnath S 
Published: December 2020

Abstract
The Variety of components with different shapes & Sizes with different materials can be formed using Multi stage hot forging processes. In previous times, forging process in multi stage was designed on basis of experience gained in the previous forging practices. Nowadays, many software packages based on FE (finite elements) and FV (finite volumes) method are developed. This enables creation of forging process in more effective and accurate condition. The paper insight is given in the design of multi stage hot forging process for a critical geometry of Socket Forging in a multi-step forging process. The main criterion is to minimize the number of forging stages, proper filling and stressing of the dies by analysing the contact pressure. The Theoretical derivation & Numerical Simulation results are verified with practical, industrial environment.
Use of animal fat methyl ester blend as a fuel in a CI engine
Authors: Dinesh Babu G. , Shaafi T. 
Published: December 2020

Abstract
A Direct Injection Simpson make (S217). Diesel engine examined for the characteristics of performance and emission fuelled with Diesel, methyl ester of waste animal fat (B100) and Diesel – methyl ester of waste animal fat (B20) blends. At constant engine speed, the parameters of emission and performance were determined for different loading conditions at constant engine speed. The peak cylinder pressure registered as 90 bar, 90.48 bar, and 89.93 bar respectively for Diesel, B100 and B20. Unburned HC and CO emissions remained declined in manner for B100 and B20 when related to diesel fuel.
Enhancing the agro engineering system using game theory analytics
Authors: Anithaashri T P , Ravichandran G 
Published: December 2020

Abstract
The advent of technologies and the impact of computer play an essential role in performing regular activities. The new era of Big Data analytics helps in analyzing the data through primary data and secondary data. By using modern tools to handle Distributed File systems enormous data can be handled and processed with high speed and accuracy in a stipulated time. The use of these emerging trends in all the fields gives better solution and strives the world in all aspects of digitization in a successful manner. To produce high yields in food crops, the agriculture adopted modern industrial systems. By using modern tools and techniques the agricultural production can be increased abundantly. The proposed system will help and attract the common people to invest their hard work and time in agricultural production, and make a huge contribution in the financial growth of the nation. The tractors and agro engineering tools for irrigation systems, are already used to improve the production of food crops. But the lack of advanced techniques such as smart system for monitoring the crop, to look for the strength of the soil through soil analyzer, checking for moisturisation in land and air, etc., are very much needed for proper yield. This system presents the novel framework and initial experimental results shows the feasibility of proposed system.
Laser frictional area treatment of zirconium crystals
Authors: Alisin V V , Borik M A , Lomonova E E , Yu Tabachkova N 
Published: December 2020

Abstract
The issues of laser treatment of nanostructured partially stabilized crystals of zirconium dioxide are studied in the article. The phenomena of formation of the topography of the surface of crystals after treatment by focused radiation of a repetitively pulsed laser at a wavelength of 1.06 μm are investigated. Structural changes in the surface layer have been studied by X-ray phase analysis. The formation of a golden film on the surface of the treated crystal and ceramic sample of the same chemical composition and the effect of reducing the coefficient of friction have been established. The tribological properties of PSZ crystals are investigated during friction without lubrication in the sliding mode.
Influence of laser quenching modes on tribological characteristics of 40Cr steel
Authors: Biryukov V P , Sokolov S N , Savin A P , Prince A N 
Published: December 2020

Abstract
This paper presents the results of metallographic and tribological studies of 40Cr steel samples after laser quenching with a rectangular beam. Using a full factorial experiment (FFE), the regularities of changes in the geometric parameters of the laser thermal hardening zones from the processing modes are obtained. It is shown that the jamming load is 1.5-2.1 times higher, and the coefficient of friction is 2-4 times lower than that of normalized 40Cr steel.
Research on slipper bearings of pumps of reactor systems with lead-bismuth coolant at relatively low temperatures
Authors: Bokova T A , Bokov P A , Marov A R , Volkov N C 
Published: December 2020

Abstract
The academic focus of the article relates to nuclear power engineering, reactor plants (RP) with heavy liquid metal coolant (HLMC) – lead and eutectic lead-bismuth. The article’s purpose is to set out the goals and objectives of the research of slipper bearings for HLMC transfer pumps and to identify the problems of design and operation under these conditions based on the available experience. This experience applies both to energy reactors with high HLMC temperatures (400-550°C), and partly to acceleration-controlled systems and research reactors with HLMC temperature of about 200-350°C. The choice of the type of slippper bearing is justified for further researches of its operability in conditions of low HLMC temperatures.
Study of the effects of copper undecylate on the tribological properties of refined waste oil
Authors: Fedosov S V , Terent’ev V V , Markelov A V , Osadchiy Yu P , Sokolov A V 
Published: December 2020

Abstract
The results of experimental studies of the use of refined spent oil as a base for manufacturing of lubricants with additives in the form of copper undocylate are presented. The effectiveness of cleaning spent oil by baromembran methods has been shown. The introduction of copper undecylate into the refined spent oil can reduce the friction factor by 1.7 times, wear by 28%.
Engineering Guidelines for the recovery of fast wearing parts of process equipment of beet sugar plant by plasma spraying with fusing
Authors: Kartsev S V , Kravshenko I N , Kartsev I S , Splavskiy I S , Amelin S S 
Published: December 2020

Abstract
The paper considers the possibility of the recovery of fast wearing parts of process equipment of beet sugar plants and provides a brief description of the recovering technology of these parts by plasma spraying with coating fusing. Technological parameters of plasma spraying with fusing of wear-resistant coatings are considered. On the base of the research work the Engineering Guidelines of recovery of fast wearing parts of process equipment of beet sugar plant by plasma spraying with fusing is provided.
The mechanism of fretting corrosion of details from alloy with shape memory effect
Authors: Khasyanova D U 
Published: December 2020

Abstract
The article presents the fretting wear features of details from alloys with shape memory effect as applied to pipe connections using couplings from alloy with SME (shape memory effect); describes the mechanism of fretting corrosion in the thermomechanical connections using couplings alloy based TiNi with shape memory effect and superplasticity (SU).
Searching for new physics using optically levitated sensors
Authors: Moore David C , Geraci Andrew A 
Published: December 2020

Abstract
We describe a variety of searches for new physics beyond the standard model of particle physics which may be enabled in the coming years by the use of optically levitated masses in high vacuum. Such systems are expected to reach force and acceleration sensitivities approaching (and possibly eventually exceeding) the standard quantum limit over the next decade. For new forces or phenomena that couple to mass, high precision sensing using objects with masses in the fg–ng range have significant discovery potential for new physics. Such applications include tests of fundamental force laws, searches for non-neutrality of matter, high-frequency gravitational wave detectors, dark matter searches, and tests of quantum foundations using massive objects.