scholarly journals Methodology for estimating the resource of the friction vibration damper of a freight car trolley

2021 ◽  
Vol 2094 (5) ◽  
pp. 052064
Author(s):  
Oleg Cherepov ◽  
Aleksandr Antropov ◽  
Vitaliy Karmatskiy ◽  
Andrey Arkhipov ◽  
Vasiliy Lapshin
Keyword(s):  
Life Cycle ◽  
Turnaround Time ◽  
Technical Condition ◽  
Friction Model ◽  
Design Stage ◽  
Vibration Damper ◽  
Digital Twin ◽  
Scientific Substantiation ◽  
Freight Car ◽  
The Cost

Abstract The concept of digitalization of railway transport and the introduction of digital technologies provides for the creation of a “Digital Railway” based on a “Digital Twin”, including a “Digital Twin” of a car, which implements a number of information and organizational measures aimed at assessing the current technical condition of a real car during its operation; reducing the cost of the life cycle of the car; increasing the reliability of assemblies and parts (increasing the overhaul life); reduced maintenance costs; creation of a service maintenance system for freight cars throughout the life cycle. However, the wear of vibration damper parts is the most important parameter that determines the turnaround time, the volume of repairs and the dynamic qualities of the car, which requires more detailed and reliable scientific substantiation. The assessment of the wear of vibration damper parts (friction bar, friction wedge, bolster) is carried out in two ways - by direct examination of them in operation (in this case, wear is estimated by changing the linear dimensions, i.e., in mm over the service life) and according to the results of bench tests of models of vibration damper or testing samples on friction machines (in this case, wear is estimated by the mass of the worn-out material). The proposed method for predicting the wear of parts of frictional vibration dampers implements the Archard friction model, takes into account the variability of loads acting on the working surfaces, for which a method for determining the friction path under various driving conditions has been developed. The developed methodology makes it possible to evaluate their service interval at the design stage of the car’s running gears.

scholarly journals Digital Twin Aided Sustainability and Vulnerability Audit for Subway Stations

2020 ◽  
Vol 12 (19) ◽  
pp. 7873 ◽  
Author(s):  
Sakdirat Kaewunruen ◽  
Shijie Peng ◽  
Olisa Phil-Ebosie
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Carbon Footprint ◽  
Carbon Emissions ◽  
Building Materials ◽  
Information Model ◽  
Subway Station ◽  
Digital Twin ◽  
Subway Stations ◽  
The Cost

Digital twin (DT) or so-called ‘building information model (BIM)’ has brought great revolution to the current building industry. Its applications to life cycle management of buildings and infrastructures can further increase the social and economic benefits. As a complete information model, a digital twin integrates the information of a project from different stages of the life cycle into a model, in order to facilitate better asset management and communicate through data visualizations with participants. This paper unprecedently introduces a digital-twin aided life cycle assessment to evaluate a subway station. Dadongmen subway station in Hefei was used as a case study. This new study benchmarks the cost estimation and carbon emission at each life cycle stage of the project. The cost in the construction stage of the project is the highest, accounting for 78% of the total cost. However, the amount of carbon emissions in the operation and maintenance is higher than the amount during the production of building materials, accounting for 67%. Among them, concrete only accounts for 43.66% of the carbon emissions of building materials, even though concrete was mainly used for constructing the metro station. Steel bar and aluminum alloy have carbon emissions of 29.73% and 17.64%, respectively. In addition, emerging risks of the subway stations can be identified. The digital twin has been used to illustrate vulnerability and potential solutions to emerging risks, and to assess the suitability through life cycle cost and carbon footprint. This initiative is relatively new to the industry. The new insight into life cycle assessment or LCA (especially carbon footprint over the life cycle) integrated with digital twin applications will enable sustainable development that will enhance resilience of metro railway systems globally.

scholarly journals Features of the survey and monitoring of the technical condition of cultural heritage objects based on the BIM model

2021 ◽  
Vol 258 ◽  
pp. 09029
Author(s):  
Sergey Ekba
Keyword(s):  
Life Cycle ◽  
Cultural Heritage ◽  
Laser Scanning ◽  
Technical Condition ◽  
Information Modeling ◽  
Design Stage ◽  
Engineering Research ◽  
Heritage Sites ◽  
Mandatory Requirement ◽  
Building Information

In Russia, Building Information Modeling (BIM) is becoming a mandatory requirement for the construction of new buildings. There is a positive experience in the implementation and examination of projects with BIM. A number of Russian companies have already introduced and are actively using information design technologies in their activities. However, at the current moment, the use of BIM in Russia is at the start. This paper shows examples of the use of BIM and laser scanning in the development of scientific and project documentation for cultural heritage sites. The paper shows the stages of engineering research. A comparison is made between traditional methods of building inspection and with the method of laser scanning. The key advantages of using a BIM model at the design stage, restoration and subsequent stages of the object’s life cycle are shown. The promising areas of application of BIM technologies, laser scanning technologies at different stages of the life cycle of an object (buildings, structures, utilities) have been identified.

scholarly journals Integrated logistics support for the life cycle of building objects

2020 ◽  
pp. 17-25
Author(s):  
Volodymir Marchuk ◽  
Henryk DŹWIGOŁ
Keyword(s):  
Life Cycle ◽  
Information Model ◽  
Technical Condition ◽  
Information Environment ◽  
Design Stage ◽  
Construction Sites ◽  
Operational Information ◽  
Logistic Support ◽  
Integrated Logistical Support ◽  
Integrated Information

The role of integrated logistical support in the after-sales stages of the life cycle of construction sites is considered. It is shown that the effective management and operation of buildings and structures, their engineering equipment, is impossible without the analysis of logistical support, which is carried out at the design stage and is refined at the following stages of the life cycle of construction objects on the basis of accounting and analysis of operational information on the management of technical condition of construction. An information model of integrated logistic support for the life cycle of construction structures has been developed. It is shown that the core of the information model is an integrated information environment that contains information about the construction object, resources and processes, ensures that the data involved in the life cycle of the entity is stored and accessible. Data is added to the information environment by all participants throughout the lifecycle of the objects, allowing you to receive and analyze up-to-date project documentation and visualizations at any time. The stages of the life cycle of construction objects in an integrated information environment are analyzed.

scholarly journals Methodology for constructing digital twins in railway transport

2021 ◽  
Vol 80 (2) ◽  
pp. 91-99
Author(s):  
D. V. Shevchenko
Keyword(s):  
Life Cycle ◽  
Industrial Revolution ◽  
Physical Object ◽  
Virtual Space ◽  
Railway Transport ◽  
Digital Twin ◽  
Fourth Industrial Revolution ◽  
Digital Twins ◽  
Virtual Operation ◽  
Freight Car

Fourth industrial revolution covers all areas of human economic activity, including areas related to the design and operation of various products (nuclear power plant building, freight car, MEMS devices, etc.) throughout their entire life cycle. One of the main tools for digital transformation of industry to meet new competitive requirements is the Digital Twin, which is always built for a specific physical object. The introduction of digital twins technology into the life cycle of a freight car will increase economic efficiency throughout its life cycle.Effective use of the digital twin technology is possible only when an adequate virtual model of the space surrounding this physical object is created. In this regard, predicting the behavior of a structure during motion on the basis of a high-precision model of a digital twin of a physical object requires the creation of a virtual space in which a virtual operation area will be implemented, which provides the possibility of mathematical modeling of motion. To do this, it is necessary to create virtual stands and operation areas, where it will be possible to carry out numerical tests. Creation of a high-quality virtual space will drastically reduce the number of field tests carried out, and study the effect of a larger number of parameters on the performance characteristics of a physical object.Creation and use of digital twins is consistent with the goals, objectives and action plan of the Strategy for the development of transport engineering in the Russian Federation for the period up to 2030. The introduction of digital twins in railway transport, in particular in freight rolling stock, will make it possible to correctly assign the service life, overhaul times, and increase operational efficiency, collect information about the real load, etc. To maintain competitive advantages over other modes of transport, the transport industry needs to develop towards the introduction of elements of the fourth industrial revolution, including digital twins.

DESIGN CONSIDERATIONS FOR MAINTENANCE: FACILITY MANAGERS’ PERSPECTIVE

2016 ◽  
Vol 3 (1) ◽  
Author(s):  
Armin Jalali Sohi ◽  
David Arditi ◽  
Afshin Jalali Sohi
Keyword(s):  
Life Cycle ◽  
Construction Projects ◽  
Facility Management ◽  
Design Stage ◽  
Maintenance Cost ◽  
Design Phase ◽  
Maintenance Schedule ◽  
The Us ◽  
Design Deficiencies ◽  
The Cost

Maintainability is one of the considerations designers take into account in the design stage of building construction projects. In other words, maintainability is a design consideration that may improve ease of maintenance during operation. The designer is expected to include maintenance knowledge and experience into the design, including planning for specific tools to facilitate implementation. Maintainability issues appear during the occupancy stage and have a direct impact on the cost of owning and operating a facility. Annual operation and maintenance expenses during the life cycle of a building could amount to many times the initial construction cost. Design deficiencies constitute one of the main reasons for high annual maintenance cost. Facility management involves activities to maintain and operate a constructed facility. It is essential to evaluate facility managers’ perspective on how maintainability characteristics should be considered at design phase of facilities. A survey of 168 facility managers in the mid-west region of the US is uncovered that (1) maintainability should be top priority in design, especially for mechanical systems, (2) deferred maintenance should be avoided because it increases costs over the life-cycle of buildings, and (3) constructed facilities should be handed over with a maintenance schedule provided by the designer. Paying special attention to maintainability in the design phase is expected to help reducing the cost of operation.

Implementation of Life Cycle Costing: A Case of Hostel Building in Kediri, Eastern Jawa, Indonesia

2016 ◽  
Vol 845 ◽  
pp. 326-331 ◽  
Author(s):  
Peter F. Kaming ◽  
Juli Marliansyah
Keyword(s):  
Life Cycle ◽  
Life Cycle Cost ◽  
Investment Project ◽  
Development Project ◽  
Design Stage ◽  
Life Cycle Cost Analysis ◽  
Building Life Cycle ◽  
The Cost ◽  
Building Project

Analysis of the life cycle cost of a design process that is important in controlling the initial costs and future costs in possession of an investment project. Therefore, there should be a life cycle cost analysis study to determine the cost of any category contained in the hostel building project in the area of Islamic Hospital jimbunmedika Kediri and also see how much the total cost incurred by a development project in the area of hospital hostel Islam jimbunmedika Kediri ranging from the design stage to the technical life of hostels set .The purpose of this study is, identify the service life of the building material components hostels on Hospital Grounds JimbunMedika Kediri, and make long-term plans of the building life cycle cost hostels in the area Jimbun Medika Kediri Hospital. From the results of the research, there are three groups that make up the life cycle cost is the cost of building, operating costs, and the cost of maintenance and replacement. For a long-term plan the life cycle cost of the costs and the percentage obtained as follows, development cost Rp.4.290.000.000 (46%), operational costs Rp. 3.799.333.250 (28%), maintenance and replacement costs Rp. 2.590.900.000 (26%).

Organization of life cycle management of indigineous russian locomotives

2021 ◽  
pp. 62-71
Author(s):  
A. P. Semenov ◽  
Keyword(s):  
Life Cycle ◽  
Information Systems ◽  
Electricity Consumption ◽  
Life Cycle Management ◽  
Technical Condition ◽  
Spare Parts ◽  
Design Stage ◽  
Equipment Replacement ◽  
Materials Used ◽  
Operating Organization

The service system for managing the life cycle of locomotives faces the problem of obtaining objective information about the technical condition of the locomotive and its operation. Designers of equipment and the locomotive as a whole, locomotive-building plants, service companies, locomotive repair plants and the operating organization have their own information systems that are not connected to each other. It is proposed to create a cross-platform management system for the locomotive life cycle database with the collection of information from all information systems at all stages of the locomotive life cycle with the appropriate management organization, which is described in the article. Information about the structure of the locomotive equipment, possible suppliers and maintenance regulations (MRO) is formed at the design stage. Information on the numbers and suppliers of installed equipment and test results is generated at the stage of locomotive manufacturing. In operation, the mileage of the locomotive, the ton-kilometer work, and, if possible, the electricity consumption are recorded. The MRO system registers the types and volumes of work, their duration and cost, and the spare parts and materials used. Equipment replacement is also registered. Separately, the reasons for failures and super-cycle work are analyzed. As a result, the database is formed for multi-factor analysis of the reasons for the low reliability of locomotives, the high cost of the life cycle. Corrective measures are being developed.

Efficiency of application of the phase-chronometric method and neurodiagnostics for monitoring the degradation of rolling bearings during operation

2020 ◽  
pp. 43-50
Author(s):  
A.S. Komshin ◽  
K.G. Potapov ◽  
V.I. Pronyakin ◽  
A.B. Syritskii
Keyword(s):  
Life Cycle ◽  
Wavelet Analysis ◽  
Metrological Support ◽  
Rolling Bearing ◽  
Technical Condition ◽  
Measurement Information ◽  
Rolling Bearings ◽  
Vibration Diagnostics ◽  
Bearing Life ◽  
Alternative Approach

The paper presents an alternative approach to metrological support and assessment of the technical condition of rolling bearings in operation. The analysis of existing approaches, including methods of vibration diagnostics, envelope analysis, wavelet analysis, etc. Considers the possibility of applying a phase-chronometric method for support on the basis of neurodiagnostics bearing life cycle on the basis of the unified format of measurement information. The possibility of diagnosing a rolling bearing when analyzing measurement information from the shaft and separator was evaluated.

Evaluation Of The Functional Of Space-Planning Arrangement Of A Building

2019 ◽  
pp. 4-9
Keyword(s):  
Numerical Simulation ◽  
Life Cycle ◽  
Initial Data ◽  
Objective Assessment ◽  
Objective Evaluation ◽  
Point Of View ◽  
Shopping Centers ◽  
Space Planning ◽  
Planning Decisions ◽  
The Cost

The article focuses on the problem of the lack of objective evaluation of space-planning arrangement of buildings as a creative approach of the architect to the performing of functional tasks by the object. It is proposed to create a methodology for assessing the functional of space-planning solutions of buildings on the basis of numerical simulation of functional processes using the theory of human flows. There is a description of the prospects of using this method, which makes it possible to increase the coefficient of compactness, materials and works saving, more efficient use of space, reduce the cost of the life cycle of the building, save human forces and time to implement the functional of the building. The necessary initial data for modeling on the example of shopping and shopping-entertainment centers are considered. There are three main tasks for algorithmization of the functional of shopping centers. The conclusion is made about necessity of development of a method for objective assessment of buildings from the point of view of ergonomics of space-planning decisions based on the study of human behavior in buildings of different purposes.

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