Study of design features of mobile charging units for electric transport for development of sketch design documentation

THE PURPOSE. Charging infrastructure is one of the factors influencing the transition to electric vehicles, as the electric vehicles in operation are characterized by a small range and a long battery charge period. Today, the development of the charging infrastructure depends only on the networks of stationary charging stations, which also have disadvantages (high cost, lack of mobility, etc.). Therefore, the purpose of this work is to study the design features of mobile electric vehicle charge units (MCSEU) for the development of draft design documentation for the creation of a new MCSEU project. This issue includes the study of the world market of manufacturers of modern mobile chargers, the study of technical and operational features that are today presented to modern energy storage and storage systems.MATERIALS. The authors of the article processed and analyzed data on the current state of the charging infrastructure in Russia and the world, based on materials from Russian and foreign authors, as well as information on the development strategy of the electric transport industry in Russia and the world, in particular, data from Madison Gas and Electric.RESULTS. The obtained analytical results are one of the aspects that will be taken into account when developing mobile charging devices for electric vehicles. This mobile charger technology significantly expands the possibilities of using electric vehicles, in particular electric vehicles, and also solves various problems of the fuel and energy complex associated with autonomous power sources and distributed generation systems.CONCLUSION. The charging infrastructure is one of the factors influencing the transition to electric vehicles, as the electric vehicles in operation are characterized by a small range and a long period of charging the traction battery. However, this process will be long and in the near future networks of charging stations will be created, including mobile charging units for electric vehicles.

TECHNICAL CHARACTERISTICS AND WAYS OF DUMP CARS UPGRADING FOR INDUSTRIAL TRANSPORT

The article deals with the models of dump cars, which form the basis of a modern fleet of industrial railway transport. The design features of dump cars used for transportation and automated unloading of coal ore, soil, sand, gravel and other similar goods at domestic industrial enterprises are presented. Models of modern dump cars of domestic production for industrial railway transport, which were created and put into serial production during the last ten years, are given. The main existing requirements to design and manufacture of dump cars are determined. The results of comparative analysis of technical characteristics of dump cars of the last generation up to modern models of dump cars showed that one of the main advantages of the latter is to improve the strength and reliability of individual components and systems. The main focus of design upgrading of modern models of dump cars of domestic production for industrial railway transport is determined. The technical requirements for dump cars of the next generation, which are planned to be created and introduced into serial production in 2022-2026 for operation on the railway tracks of industrial enterprises, are proposed. Technical requirements are based on the results of the design studies of the present-day dump cars for industrial applications, review of technical and design documentation for these cars, and also the analysis of requirements and wishes of customers. The necessity for relevant research and development works of dump cars of the new generation for industrial railway transport is substantiated. The materials of the article will contribute to the construction of new models of dump cars for industrial railway transport and total upgrading of existing models, as well as improving the efficiency of their operation. Key words: dump car, maintenance interval, strength, industrial railway transport, service life.

HISTORICAL FORTIFICATIONS IN THE ARCHITECTURAL AND URBAN PLANNING STRUCTURE OF LVIV (ON MARGINES DOCUMENTATION "HISTORICAL AND ARCHITECTURAL REFERENCE PLAN OF LVIV")

Ancient city fortifications are one of the specific types of defensive architecture. Along with the buildings of castles, blocks of urban residential development, monastery complexes and field defensive structures, they formed a special type of architectural and urban planning objects. During their construction, the skills of both an architect, builder, and military engineer were often combined. Not so many objects of urban defense architecture have come down to our time. Therefore, every fragment of the city's defensive walls and earthen fortifications preserved today, as a rule, is a valuable document of its era and needs careful protection and preservation. Urban fortifications (as opposed to fortifications of castles or fortresses) were the objects of priority liquidation in the process of urban development. There are very few of them preserved in Ukraine, so their preservation and study is a matter of extreme importance. Lviv is a unique city on the map of Ukraine in terms of the development of urban fortifications. The article analyzes the reflection of objects and monuments of defense construction in the scientific and design documentation "Historical and Architectural Reference Plan of the City of Lviv". Data on the stages of development of Lviv fortifications are highlighted. Special attention is paid to the remains of fortifications that have been preserved in the archaeological form. Their identification, conservation and identification is important task for modern urban development projects. The paper makes hypotheses about some hitherto unidentified elements of fortifications of the XVII-XVIII centuries. Special emphasis is placed on the need for a special scientific study on the detailed reconstruction of all stages of the development of defense belts around the city center and suburbs of Lviv

Studio In-Situ

This photo essay explores the possibility of radically shifting the understanding of the design studio as a spatial construct. By considering the seven-year evolution of a (socalled) design-build project known as the Imizamo Yethu Water Platforms, it recognises the possibility of dislocating the design studio from its traditionally centralised space in the academy and moving it to the site of its investigation or intervention for the duration of a project. The Imizamo Yethu Water Platforms aimed to improve water and sanitation infrastructure in a severely under-resourced informal settlement in Cape Town, South Africa, through the insertion of small permanent public spaces. Due to a number of reasons, including the physical characteristics of the sites selected for these spaces, the design studio gradually shifted its physical location to such an extent that virtually the entire design, documentation and construction process took place in-situ.

Historical River Training Works on the Lower Elbe

The paper deals with river training works built on the reach of the Elbe River between the city of Ústí nad Labem (CZ) and the Czech/German border. Downstream of the Ústí nad Labem, the Elbe in the Czech Republic and in Germany has only been made navigable through river training measures without building weirs. The goal of river training for watercourse navigability is to attain the required waterway parameters through fairway adjustments. This is primarily achieved through channel dredging and the construction of training dams to concentrate the water flow into a narrower but deeper main channel. The paper describes the historical development of river training works during the period from the Middle Ages to the present day. Initially, such works were not meant as part of a unified conceptually designed system of measures. Instead, they were local initiatives aimed to remove natural obstacles from the river bed and to build facilities and structures to aid navigation. Systematic regulation works along the Czech and German sections of the Elbe only started in the early 19th century. The research was focused on studying the original project documents and documentation of the actual design of the training dams since 1894. This historical design documentation was digitised and projected into the maps in the Czech JTSK local coordinate system through the use of advanced geographic information system (GIS) methods. The final atlas of river training works on the Elbe-Vltava Waterway (EVW) along the lower Elbe in the Czech Republic is the first of its kind, utilising geographic information systems to document the locations of technical structures built since the early 19th century in the Elbe River bed in order to make the river navigable and maintain its navigability. The collection of maps also documents the development of the river training works in time based on map data obtained from digitised design documentation from the 19th and 20th centuries, historical aerial photographs dated 1930–1946 and 1950–1964, and present-day maps and orthophotomaps of the Elbe section in question. The atlas of the Elbe-Vltava Waterway river training works is publicly available via a web-based application. The maps are a result of original research and offer a synthesis of interactions between the existing technical structures, the sediment regime of the Elbe and sites that are subject to environmental protection. The research was conducted as part of project no. DG18P02OVV004 entitled “Documentation and presentation of technical cultural heritage along the Elbe-Vltava Waterway” within a support programme for applied research and experimental development of national and cultural identity, funded by the Ministry of Culture of the Czech Republic.

Quality of Design Documentation in the Construction Industry: A Review Using Meta-Synthesis Approach

A meta-synthesis approach was used to identify, synthesize, and categorize appropriately factors in the literature that contribute to design documentation quality. The categories include factors on quality attributes, quality indicators, and quality-influencing factors. Findings indicate that the quality of design documentation in practice is unsatisfactory, therefore, there is a need for collaboration between the owner, designers, and end-users to improve design documentation quality. The results offer pragmatic data on design documentation quality in the construction industry between the years 1992 and 2019. However, further research on the significant impacts of poor-quality design documentation on construction projects is recommended.

Results of re-using Soyuz manned spacecraft descent thrusters

This paper presents the results of re-using the descent thrusters of the descent module of Soyuz manned transportation spacecraft. A description of the thrusters design, their performance and configuration on the descent module is provided. Based on statistical evidence on the remaining life of thrusters, it was stated that the remaining lifetime is more than one and a half times higher than the required value for re-use. The results of stand-alone tests of catalytic packages and thrusters are presented to confirm the re-usability. It was demonstrated that the performance of thrusters when being re-used remain within the limits allowed by the design documentation. A description of the post-flight maintenance program is presented, based on which results a certificate of fitness for thruster re-use is issued. The statistics of the re-use of the descent thrusters is provided. As of June 1, 2020, 40 thrusters were admitted for re-use. All thrusters operated with no comments. Key words: descent module, low-thrust jet engine, hydrogen peroxide, re-use.

Analysis of the quality of design documentation for the construction of an apartment building

Within the framework of this article, the analysis of the current situation in the construction industry of the Russian Federation, current scientific and regulatory methods of conducting a high-quality check of the developed design documentation for an apartment building is carried out. The author of the article in the work considers measures that allow to effectively conduct a comprehensive assessment of the effectiveness of design solutions from a technological and regulatory point of view, as well as take into account the entire range of environmental, social, external economic and other consequences that are the result of decisions made.