bluuebunny/crossref_metadata_2025_split huggingface dataset:
Stress/Strain analysis in the bogie in linear motion
Authors: Blanari I , Goanta V 
Published: October 2019

Abstract
The railway wheel, together with the axle, represents one of the very important parts that support the safe operation of railway vehicles. Wheels support the entire weight of cars. Therefore, the reliability is demanded in terms of accuracy. Accordingly, the most important and fundamental characteristic in designing wheels is strength. The investigation of dangerous area in bogie is one of important area of study in railway manufactured. This essential information is required in structural integrity, failure and fatigue calculation to determine lifetime for scheduling the maintenance and regrinding necessity. The aim of this work is to determine the stress/strain in a bogie to common working in operating conditions using the 3D finite element method (FEM). The FEM results carried out using 3D elements allows the stress/strain distribution with good accuracy. Knowing the maximum stress/strain value in a bogie, prevents an unsafe construction from the design stage, and consequently increases safety in rail traffic.
Design for manufacturing using TEBIS CAM software for milling processing
Authors: But A 
Published: October 2019

Abstract
Complex parts require specific processing. Computer aided manufacturing solutions make their mark and optimize the manufacturing process. Different CAM software’s have different philosophy with different capabilities. TEBIS CAM software brings more facilities and opportunities to manufacturing a complex part. In the paper was presented this capability on real part. It was made the comparison between two different milling strategies: one classical milling strategy-Contour parallel strategy, versus adaptive milling strategy. Was presented the way how was implement the TEBIS CAM software and the results of manufacturing. The time of manufacturing was significantly reduced with 43% using the adaptive milling strategy and the surface accuracy was improved.
Software instrument used as interface in the design of technical installations
Authors: Popa L , Popa V 
Published: October 2019

Abstract
Technical installations can account for up to half of the building costs and it is crucial to have detailed projects for the assembly and maintenance of these systems. This means that workflow can be improved more efficiently and faster. With the help of the installation engineer, the beneficiary can track and control the correct execution of the works. The installation engineer is the link between the beneficiary and the contractor or those who deliver the materials and equipment, people who generally follow works and additional sales. As regards the design of technical installations, the development of versatile low-response software interfaces becomes necessary and appropriate. The article is focused on the interface that has been developed as a software instrument to increase design process productivity and optimization of technical installations by reducing the required work time and the number of clicks made. Inside the application, the Revit design software was used and the number of clicks needed to access the element linking and node troubleshooting of the technical installations was reduced. Two new functionalities have been created within the software application: “connect and copy” and “connect and rotate”.
Design and analysis of side dump bucket for wheel loader using CAD/CAE/CAM technologies
Authors: Debeleac C 
Published: October 2019

Abstract
In this paper the author presents a wheel loader equipped with side dump bucket modelled with modern technologies used in mechanical engineering fields (SolidWorks, Femap and NX 11 manufacturing). The various behaviours that acting on the bucket during technological process were analysed with finite element method. The obtained results validate appropriate dimensioning of main elements of bucket ensemble in proposed constructive variant.
The generation of the worm and wheel gears in a CAD soft
Authors: Popa D , Popa C M 
Published: October 2019

Abstract
In this paper, we present the way to obtain in AutoCAD the solids that materialize the worm and wheel gears. The worm and wheel gears are practically used first of all due to their high transmission ratio. After the state of the art of the worm and wheel gears, we present the manufacturing possibilities of the wheels. Further on, one presents the way to obtain of the solids that materialize the cylindrical and globoid worms, using AutoLisp functions in AutoCAD. By Boolean operations, one extracts from the raw material that approximates the worm, the solid that materializes the tool. One thus generates cylindrical worms with 1, 2, and 3 starts and globoid worms with one start. The obtaining of the wheels is performed in a similar way, the tool being the already obtained worm.
Determining the state of stress in the narrow section of Arcan test specimens, by the FEM method
Authors: Danila N A , Blanari I , Barsanescu P D 
Published: October 2019

Abstract
Mohr-Coulomb failure criterion is used to establish the failure conditions under a compound state of stress. According to this criterion, materials failure is produced to a certain combination of normal and shear stresses. Arcan type tests are an easy way to study the specimens behavior in pure and mixed mode (tensile & shear) respectively. The fixture allows an ARCAN sample to be rotated at 15° increments from 0° to 90° to produce different amounts of mode-mixt during loading; with 0° being pure tension/compression loading to 90° being pure shear loading. The Arcan method, like the Iosipescu method, uses specimens with a predetermined breaking section. A condition for material testing is that the stress in the narrow section to be as uniform as possible. This depends on the shape and depth of the notch. Starting from apriori knowledge about Iosipescu specimen, the modelling will be carried in FEM software to optimize the shape of the specimen, in order to obtain more uniform stress in cross section, A FEM is performed for Iosipescu specimen, designed for pure shear, when it is mounted in Arcan device, so it is need to be studied for some complex states of stress. The studied material is aluminum alloy type 7075, used in aerospace industry. This analysis is necessary before the tests are carried out, in order to adopt an appropriate form of the specimens.
Structural health monitoring of critical zones of small wind turbine blades for domestic users
Authors: Savin A , Iftimie N , Nastac S M , Stanciu M D 
Published: October 2019

Abstract
The most important part of wind turbine is the blade that must be tested during fabrication and functioning when can be damaged by moisture absorption, fatigue, wind guests or lightning strikes. The fibers can also appear and develop under moderated loads or cracks and delaminating due to the low energy impacts etc. The aim of this paper is to identify the modal behavior of small wind turbine blade in terms of the signal convergence, modal evolutions and frequency spectra. There are numerous methods for monitoring and detecting structural damage of the wind blades, but in this study it was used the impact hammer method. The results emphasized the natural frequencies, the modal shape of structure and the signal coherence captured in different points.
The error assessment in case of using two models for the displacement of a linear spring
Authors: Ibanescu R , Ibanescu M 
Published: October 2019

Abstract
The displacement of the free end of a spring is not always an axial displacement. In some circumstances, the free end of the spring displaces along a circular trajectory, and the spring elongation is considered approximately equal to its axial displacement. Such an approximation is used for modelling the suspension of railway wagons. The present work purpose is to exactly determine the elastic force in case of spring free end circular displacement, in order to compute the error of considering this displacement equal to the spring axial displacement. Then, the real dynamic behavior of the model is compared with the approximate one, by numerical simulation.
Dynamics of employers’ costs for the implementation of the dual model in industrial sectors
Authors: Ogorodnikova E S , Kokovikhin A Yu , Creciun L G , Kochergina T V 
Published: October 2019

Abstract
The introduction of the dual model of education is one of the promising areas for providing personnel with the necessary qualifications of industrial production in Russia. In the framework of this study, the task was to determine the role of the employer in the process of organizing the dual model. The main research method is the analysis of the structure and cost dynamics of industrial enterprises aimed. The purpose of the article is to analyze the dynamics and cost structure of the implementation of the dual model on the example of the industrial sectors of the Sverdlovsk region.
Implementation of tool-technical base of agile manufacturing in Russian industry
Authors: Gromova E A 
Published: October 2019

Abstract
The Fourth Industrial Revolution led to a shift in the strategic orientation of industrial enterprises, which explains the generation of new production concepts. In modern realities, the scale of production has lost its relevance. Minimizing costs and the highest quality of products still play an important role, but such a guideline as speed has come to the fore. The main tool-technical base of agile manufacturing approach is considered in terms of changing of enterprises production systems. The aim of this paper is to prove in practice that the agile manufacturing is promising for Russian industry. The approbation of the concept of agile manufacturing in metallurgy was carried out. In 2017, PJSC Severstal launched a major innovation program aimed at ensuring business growth without a significant increase in production, and focusing on three key areas: innovative products, innovative processes, innovative business model. Summarizing, agile manufacturing approach is offered as effective for Russian industry development.
Ishikawa diagram applied to identify causes which determines bearings defects from car wheels
Authors: Luca L , Luca T O 
Published: October 2019

Abstract
The use of quality management tools plays a great role in improving the quality of products or services offered and helping to ensure the internal efficiency and effectiveness of the organization as well as improving customer satisfaction. Considering the advantages of using quality management tools, the author of this paper presents a study on the application of the Ishikawa diagram for the problem of bearing defects from car wheels. A list of potential causes that generated the studied problem was made. Brainstorming method has also been used in this regard. The identified causes have been classified into four main categories: Man (M), Manufacturing of bearings (M), Service - Bearing replacement (S), Exploitation of the car (E). It resulted a new model of the Ishikawa diagram, that has the formula 2M + S + E. The Ishikawa diagram determined and presented in this paper identifies the causes that generate a non-quality type problem. The diagram provides the advantage of a correct orientation to correct nonconformities, as well as the basis for further studies with other appropriate methods, solutions or measures to eliminate the causes. This case study presented in the paper may be the basis for other studies related to the proposed problem.
Reengineering of the design process: An industrial case
Authors: Boudouh T. 
Published: October 2019

Abstract
In this article, a Business Process Reengineering (BPR) approach is applied to the design process of electric motors. The objective is to improve the quality, reduce costs and duration of the design process by bringing radical change to the process allowing breakthrough improvements rather than obtained by continuous improvement. For this purpose, the Design Structure Matrix (DSM) is used to represent and analyse the design process. This method is particularly adapted to capture the repetitive aspect of design tasks. Indeed, iterations, an inherent feature of the design process, represent a key factor in the determination of the design process duration and cost. In this study, the number of iterative tasks is reduced by 50%. The implementation of the reorganized process needs an organisational change in the design office but the expected benefits are worth the effort.
CFD study of aerodynamic sensitivity to air deviation angle for a hatchback vehicle
Authors: Ilea L , Iozsa D , Stan C , Fratila G 
Published: October 2019

Abstract
Movement is the base of most nowadays activities. For this purpose, vehicles that have specific characteristics for various needs were developed. The current legislation enforces an aerodynamic homologation process to assess a vehicle’s CO2 footprint. This process has to be done in specific conditions, with airflow at 0 degree deviation. The increasing concerns toward pollution will soon lead to the introduction of new rules meant to closely simulate real life vehicle usage, like the RDE test. The current paper has the purpose to analyse, using the CFD method, the influence of the directionality of the airflow (i.e. front-at 0 degree deviation and at various deviation angles) on the aerodynamic performance of a vehicle. The paper studies the airflow behaviour of a hatchback body type vehicle for airflow direction angles between 0 and 20 degrees, through Cd parameter. The focus of the analysis was on air direction (± angles) and simulating time. Due to vehicle asymmetry, the results were different in case of positive and negative values of the airflow angle. The simulation time leads to slightly different Cd due to different averaging periods. Obtained results indicate the necessity of future investigations towards the optimisation of aerodynamic elements in crosswind conditions.
Strategic directions of transport and logistics to ensure the implementation of new industrialization processes
Authors: Ogorodnikova E S , Sidorenko A M , Semenet I I , Morkonosov A G 
Published: October 2019

Abstract
Ensuring the processes of industrialization of the modern economy requires the formation of an efficient transport and logistics infrastructure. The solution of this task is carried out using the tools of strategic management, in particular the formation of strategic goals. The article presents the strategic goals and the corresponding strategic measures in the field of ensuring the availability and quality of transport and logistics services in the field of freight traffic at the level of the needs of the development of the economy of the Sverdlovsk region
Dynamic analysis of a mechanism of an engine with variable compression ratio
Authors: Mănescu B , Stănescu N D 
Published: October 2019

Abstract
Increasing of the energetic performances of an engine and reducing the consumption of fuel, and emissions of carbon oxides may be obtained with the aid of a mechanism with variable compression ratio. In this paper, we perform a numerical study of one mechanism of this kind highlighting the variation of the mechanical parameters and the influence of the geometric dimensions on the compression ratio.
The reduction of the fuel consumption and of the pollution through the city public transport
Authors: Istrate M , Nicolae V , Vîlcan A 
Published: October 2019

Abstract
The public transportation represents the ideal solution that can be offered with the purpose of satisfying the mobility request through an urban area. A highly organized and efficient public transportation system which offers adequate movement possibilities, in a short time and through high safety and comfort conditions, forms the basis of an urban transportation system that improves the sustainable development of a urban area. Over this paperwork it is going to be estimated the optimization effects of the Pitesti urban transportation system, and even more, it is going to be established the „translation” way of the different improvements for the public transportation system as input data into the urban transport model. In this way it will be shown how the renewal of the vehicles and the modernization of the bus stations could get to the increasing of the urban transport share, thus succeeding the decrease of the own vehicles transport. As a consequence, through the private vehicles movements decrease it is get, in the end, a fuel consumption and gas emissions reduction, in the same time resulting a high traffic performance both for the public transportation and for the own private vehicle transportation
Considerations on longitudinal dynamics of passenger trains with blocked wheelsets during braking
Authors: Cruceanu C , Crăciun C 
Published: October 2019

Abstract
The aim of the study is to highlight the fact that, besides the other well-known aspects, wheelsets blocking during braking actions performed in poor wheel/rail adhesion conditions has important influence on the longitudinal dynamics of the train. The study is based on MATLAB numerical simulations, performed for passenger trains consisting of four vehicles. There were considered the possible operational situations specific in low adhesion condition braking, determined by the pitch effect, i.e. the possible blocking of one up to all wheelsets of the vehicle. The results presented in the paper cover two situations: train set composed of identical vehicles, considering only the braking forces and, respective, classical configuration train hauled by a locomotive with a larger weight compared to each coach, resistances being also taken into account in simulations in that case. The outcomes indicate important dynamic effects in the train body, highlighting the importance of using performant wheel slide protection devices, essential not only for traffic safety reasons, but also useful in terms of in-train level of forces. It is to mention that these results represent the initial step of a more comprehensive ongoing study.
Development of a thermal self-diagnostics system for a digital current and voltage instrument transformer
Authors: Parfenov G I , Gotovkina E E , Lebedev V D , Smirnov N N , Tyutikov V V 
Published: October 2019

Abstract
Ivanovo State Power Engineering University (ISPEU) staff have developed and put into operation innovative designs of digital current and voltage instrument transformers (DCVT) based on resistor dividers performing technical and commercial electric power accounting, and also participating in work of relay protection and automation systems. Thermal self-diagnostics systems working in real time for instrument transformers do not exist in electric power engineering, while thermal examination is often conducted according to maintenance schedules, which negatively impacts the reliability of electrical equipment functioning. Development and building of new systems of self diagnostics for instrument transformer thermal state, revealing temperatures at several points, including values for the most heated up part, in real time, is therefore a vital task, especially for controlling operation of “smart” grids. Based on the results of physical and mathematical simulation of the process of heat exchange between a transformer and its environment at different values of ambient temperature, insolation and grid voltage, methods have been developed to determine the impact of the above factors on the thermal mode of DCVT operation. Algorithm has also been developed for thermal self-diagnostics and thermal protection against overheating of instrument transformers. System of thermal self diagnostics has been developed for 6-220 kV.
Numerical investigation for high lifetime solar-powered airport signal unit development
Authors: Tarasenko A B , Fedotov A A 
Published: October 2019

Abstract
Autonomous solar-powered small light and signal units can help solve many navigation and transportation problems for sufficient solar energy potential regions. Even in case of centralized grid presence the additional consumers’ integration can be an issue due to construction works and power availability. Electrochemical accumulator is a traditional solution for such devices, but its application usually faces lifetime and stable operation at low temperatures problems. Electrochemical double-layer supercapacitor (EDLC) possess high cyclic resource and stable operation down to minus 40-45°C. Low specific energy capacity, high specific energy costs and high self-discharge rates are main drawbacks for this technology. The paper is devoted to airport signal unit operation numerical simulation in case of lead-acid accumulator and EDLC application. Using developed software based on energy balance calculation and satellite solar energy data, optimal configurations of signal units were derived for Rostov and Saratov climate conditions. Technical and economical estimations for both configurations were made from the 100% operation availability and minimum service during 20 years – typical lifetime for monocrystalline photovoltaic module. Maximum power point tracking (MPPT) charge controller features typical for such application are also considered. Target parameters for EDLC commercially attractive application were evaluated.
A pilot station using renewable resources to rehabilitate the inefficient small-hydro power plants
Authors: Radulescu V 
Published: October 2019

Abstract
In Romania, based on a complex plan elaborated during 1980-1990 were built over 600 SHP-Small Hydropower Plant to assure the power supply in isolated localities. After 30 years, less than 200 are still functional, mainly due to a lack of investments or improper utilization. Nowadays a permanent campaign concerning intensive use of renewable resources is implemented. Firstly is mentioned the economically favorable solution from the selected zone to achieve the photovoltaic power plant connected to an existent SHP, which needs to be rehabilitated. The paper presents such a pilot plant realized between 2015 and 2017, built near an SHP decommissioned in 1998. Firstly was implemented a wind turbine which starts immediately producing energy. After two months, the photovoltaic power plant was interconnected. The main steps of the hydropower plant rehabilitation are presented, beginning with the selection of the necessary parameters to establish the opportunity and the pilot station efficiency. The theoretical model and the physical realization in coupling these power plants based on three different energy resources are mentioned. Some obtained results for six months are illustrated. Finally, some of the appeared problems during the execution are mentioned, considering that similar projects in the other four sites will be developed.
Prediction of the atmospheric boundary layer in wind power plants by proper selection of the main air parameters
Authors: Radulescu V 
Published: October 2019

Abstract
Romania, based on UE reports has a high wind potential, representing more than 14,000 MW. The main scope of the paper is to estimate the distribution of the horizontal component of wind velocity in the vertical direction and its influence on wind turbines efficiency. The selected domain for analysis is located in the Southeast part of Romania until an altitude of 600 m. Firstly is presented the impact of the boundary layer’s separation in the vertical wind distribution. The database of the main measured parameters is realized with two masts of 80 m high, situated at 20 km distance each other, during for 24 months. Firstly are presented theoretical aspects allowing estimation of the vertical Boundary Layer separation influence on the wind distribution. An altimetry model for the selected area, based on approximations of the soil roughness is calibrated. There are established the necessary corrections for average and variable roughness. Secondary parameters as the air density, pressure, and temperature, also have an essential role in the proper functioning of the wind turbines. The numerical results allow establishing a long-term prediction of the vertical air distribution. The paper ends with conclusions and references.