scholarly journals Effectiveness assessment of diesel locomotives operation with the use of mobile maintenance points

2020 ◽  
Vol 54 (2) ◽  
pp. 7-19
Author(s):  
Maciej Szkoda ◽  
Magdalena Satora ◽  
Zbigniew Konieczek
Keyword(s):  
Transport Process ◽  
System Development ◽  
Average Distance ◽  
Rolling Stock ◽  
Maintenance Strategy ◽  
Maintenance System ◽  
Unit Costs ◽  
New Strategy ◽  
Maintenance Activities ◽  
Effectiveness Assessment

Based on the example of 6Dg type diesel locomotives, the paper presents a new maintenance strategy concerning periodical checks at the P1 maintenance level. Currently, such locomotives are sent off to service points every 102 hours of operation or every 14 days for a P1 level check. Studies demonstrate that the average distance to be covered by a locomotive to arrive at a service point is in excess of 60.0 km, and the quantity of fuel consumed is more than 88 litres. It is costly and time consuming to have locomotives out of service and considerable resources of the railway carrier are engaged which could be made use of in the transport process. The aim of the newly developed strategy of P1 checks is to eliminate the need for locomotives to exit their routes to reach rolling stock maintenance points. The control/diagnostic and maintenance activities specified in the Maintenance System Documentation will be performed by so-called mobile maintenance points. The development of the new strategy required: identification of the current condition of the maintenance system, development of the concept of a new strategy of P1 maintenance checks, conduct of studies and operational analyses for SM42 series locomotives, performance of a durability, reliability analysis, assessment of safety together with an analysis of the risks involved in the proposed changes. In order to review and assess the efficiency of the new strategy, an observed operation of selected locomotives was conducted together with a railway carrier. During the study, the maintenance activities and processes were monitored and the costs of P1 checks were recorded. The analysis of efficiency of the new strategy of performing P1 checks without the need for a locomotive to exit its route to reach a rolling stock maintenance point demonstrated that depending on the distance covered by the locomotive to reach a maintenance point, the unit costs of a P1 level check are lower by up to 67.1% compared with the currently applied method.

scholarly journals Change in the maintenance strategy as a method of improving the efficiency of the process of operation of railway means of transport

2018 ◽  
Vol 234 ◽  
pp. 05001
Author(s):  
Maciej Szkoda ◽  
Magdalena Satora
Keyword(s):  
Railway Vehicle ◽  
Maintenance Strategy ◽  
Legal Requirements ◽  
Vehicle Type ◽  
Maintenance System ◽  
Railway Safety

The paper presents a description of methods of changing the maintenance strategy concerning measures of intervals between maintenance levels based on the example of a selected railway vehicle type. The process starts with monitoring the vehicle after it is put into operation and the operational database is built, through the statistical and RAMS analyses, to the approval of changes in the maintenance system documentation by qualified railway safety bodies. Following the applicable formal and legal requirements, one of the key problems involved in the introduction of changes in the railway vehicle maintenance system is an assessment of the proposed changes for safety.

scholarly journals Identification of rolling stock in railway transport management

2018 ◽  
Vol 19 (6) ◽  
pp. 176-179
Author(s):  
Jarosław Moczarski
Keyword(s):  
Transport Process ◽  
Moving Objects ◽  
Computer Application ◽  
Rolling Stock ◽  
Programming Environment ◽  
Railway Transport ◽  
Analysis Techniques ◽  
Matlab Programming ◽  
Transport Management ◽  
Subsequent Identification

An important factor improving the safety of the railway transport process is the automatic recognition of the rolling stock and the transported loads. Using modern data acquisition and analysis techniques allows to identify moving objects by assessing their shape and size. For the creation of digital models of the studied objects and their subsequent identification there was developed a computer application working in Matlab programming environment. The application use the functions of designing, implementing, visualizing and simulating neural networks. The configuration of the test stand allows for carrying out experiments using analog and digital sensors.

scholarly journals Method for effectiveness assessment of rolling stock investments using LCC (Life Cycle Cost) analysis

2018 ◽  
Vol 80 ◽  
pp. 217-224
Author(s):  
Magdalena Satora ◽  
Maciej Szkoda
Keyword(s):  
Life Cycle ◽  
Life Cycle Analysis ◽  
Life Cycle Cost ◽  
Rail Transport ◽  
International Standards ◽  
Rolling Stock ◽  
Life Cycle Cost Analysis ◽  
Professional Literature ◽  
Effectiveness Assessment ◽  
Stock Investments

The article concerns the application of LCC (Life Cycle Cost) life cycle analysis as a method of assessing the effectiveness of investments in rail transport. On the basis of general guidelines contained in professional literature and international standards, including PN-EN 60300-3-3:2017-07, the LCC calculation method for rail transport is presented. This method can be used to assess the effectiveness of various variants of purchasing new vehicles, as well as to compare the costs of their modernization.

scholarly journals A new strategy of heterosis research in mice – approach and results on chromosome 19

1999 ◽  
Vol 42 (1) ◽  
pp. 103-110 ◽  
Author(s):  
C. Brunsch ◽  
U. Philipp ◽  
P. Reinecke ◽  
G. Moser ◽  
H. Geldermann ◽  
...  
Keyword(s):  
Litter Size ◽  
Average Distance ◽  
Inbred Strains ◽  
Phenotypic Variance ◽  
Chromosome 19 ◽  
Degree Of Dominance ◽  
New Strategy ◽  
F2 Generation ◽  
Selection Of ◽  
Qtl Effects

Abstract. The following steps were performed to analyse heterosis and QTL effects in litter size of mice: intercross of mouse inbred strains C57BL/6J and Balb/cJ in order to produce a F2 generation with 948 female animals; selection of trait groups with extreme high ((13 offspring) and extreme low litter size (5 offspring)); typing of 56 microsatellites with an average distance of 32 cM; detection of different chromosome regions with associations to heterosis in litter size. Chromosome 19 was associated to heterosis in litter size. Additional animals with extreme high and low litter sizes were then typed for four DNA markers on chromosome 19 and used for QTL mapping. A QTL was identified for litter size in segment D19Mit28 &ndash: D19Mit99 with a maximum at 15 cM (p ≤ 0.05). The QTL explains about 11% of the phenotypic variance in the F2 generation. With a degree of dominance of 4.09 the QTL shows that superdominance can explain heterosis in litter size.

scholarly journals RESOURCE-SAVING MAINTENANCE AND REPAIR OF SPECIAL SELF-PROPELLED ROLLING STOCK

2021 ◽  
Vol 58 (1) ◽  
pp. 3550-3555
Author(s):  
Z. G. Mukhamedova Et al.
Keyword(s):  
The Self ◽  
Rolling Stock ◽  
Reliability Model ◽  
Maintenance Strategy ◽  
Structural Diagram ◽  
Resource Saving ◽  
Maintenance And Repair ◽  
Reliability Indices ◽  
Compatible System

The article provides the issues of improving the models of reliability and optimization of maintenance and repair of special self-propelled rolling stock (SPRS) with a compatible system of diagnostics. A new maintenance strategy is proposed, taking into account the new requirements of the self-propelled rolling stock. Examples of solving practical problems of reliability indices are considered. The study of the reliability of SPRS, as an object, is advisable to start with its presentation in the form of a system of assembly units. In this sense, the level of consideration is important. Figure 1 gives a structural diagram of SPRS, as a system consisting of elements. for several possible levels of consideration. SPRS, as a system of elements, makes it possible to concretize the task of analyzing and improving the reliability model and developing measures to perfect it.

Operation and maintenance of Osmangazi Bridge

2019 ◽  
Author(s):  
Fatih Zeybek
Keyword(s):  
Suspension Bridge ◽  
Maintenance Strategy ◽  
Operation And Maintenance ◽  
Bridge Maintenance ◽  
The World ◽  
Inspection And Maintenance ◽  
Maintenance Activities

<p>Osmangazi Bridge is a suspension bridge with a 1550 meter main span is the fourth longest span bridge in the world.</p><p>The routine maintenance of the bridge are done by the Operator GIIB and the heavy repairs by the Concessionaire (Otoyol A.Ş.) based on the recommendations of the Bridge EPC contractor.</p><p>This paper summarizes the basics of the Osmangazi Bridge’s operation maintenance activities, which emphasizes to the Bridge maintenance strategy and the instructions to be applied for the operation and maintenance staff and subcontractors in order for them to undertake inspection and maintenance of the bridge. A summary of overall inspection and maintenance programs outlining the required anticipated tasks over the time is also given in the paper.</p>

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