Wyniki wyszukiwania - BazTech

1

Problem ochrony nastawni i urządzeń sterowania ruchem kolejowym w Polsce

Urbaniak Miron

Wiadomości Konserwatorskie

|

2025

|

Nr 83

96---111

PL

Ostatnie modernizacje kolei skutkują masowym usuwaniem zabytkowych urządzeń sterowania ruchem kolejowym (srk), w tym sygnalizacji kształtowej. Znikają tak wyjątkowe zabytki techniki, jak semafory karzełkowe Toruń Wschodni, Chełmża) czy sygnalizatory na pomostach (Skwierzyna), które w krajobrazie kolejowym były już unikatami. Wiele urządzeń przekazuje się miłośnikom kolejnictwa, ale ochrona o charakterze muzealnym nie może zastąpić ochrony in situ oraz in modu. Jednocześnie widać proces rozbiórek, a w najlepszym razie porzucania nastawni, które jako nieczynne, ulegają destrukcji. Te negatywne zjawiska wynikają głównie z uwarunkowań ekonomicznych oraz braku rozpoznania zasobu, i to zarówno po stronie PKP, jak i służb konserwatorskich. Intencją artykułu jest zatem, prócz charakterystyki architektoniczno-budowlano-technicznej nastawni oraz urządzeń srk, wskazanie podstawowych i najpilniejszych działań skutkujących ochroną najcenniejszych zabytków.

EN

The latest railway modernizations have resulted in the widespread removal of historic railway traffic control (RTC, interlocking) machinery, including manual signaling. Exceptional industrial heritage assets like dwarf signals (Toruń Wschodni, Chełmża) or signals on gantries (Skwierzyna), which became unique in the railway landscape. Many pieces of equipment are donated to railroad enthusiasts, but museum-like protection cannot replace in situ and in modu preservation. At the same time, one can see the process of demolition or, at best, abandonment of the signal boxes, which, being out of service, deteriorate. These negative phenomena stem mainly from economic conditions and poor resource identification, both on part of the Polish State Railways and conservation services. This paper therefore, apart from presenting an architectural, structural and technical overview of signal boxes and RTC machinery, also indicates essential and the most urgent action that can result in preserving the most valuable monuments.

2

Selected aspects of the concept of operating train traffic under the supervision of the ERTMS/ETCS L2 system on high-speed lines based on simulation studies

Pogorzelska-Szcześniak Aneta, Kochan Andrzej, Irlik Maciej, Kostrzewa Piotr, Dubowski Michał, Folęga Piotr

Transport Problems

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2025

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T. 20, z. 1

17--28

EN

High-speed railway lines require the establishment of separate rules and regulations for the design and operation of traffic relative to conventional lines. These lines require the use of advanced train protection systems, such as the ERTMS/ETCS Level 2. The functionality, configuration and design capabilities of the indicated system provide opportunities for its development, including its adaptation and performance improvements. The configuration parameters are variables defined for both on-board and trackside equipment and design rules. This article presents the results of simulation studies, which made it possible to study the influence of the set parameters on system performance. In doing so, this study provides an opportunity to establish design and configuration rules for selected aspects of the ETCS.

3

Railway brake control system for wagons pulled by a road-rail machine

Jakubowski Andrzej, Kustosz Joanna, Goliwąs Damian

Pojazdy Szynowe

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2025

|

Nr 1-2

18--26

EN

Article presents the railway brake control system for wagons pulled by a road-rail machine developed as a part of the research and development project no. 0205/L-12 co-financed by the National Centre for Research and Development under the LIDER XII programme. Both the conceptual assumptions and functionalities of this system were presented, emphasizing its innovativeness and impact on safety in the railway sector. The paper also includes experimental results aimed at verifying the key functionalities of the system and confirming its effectiveness in ensuring safe operation.

4

Subiektywne spojrzenie na rozwój kolei z uwzględnieniem kwestii dotyczących korozji oraz rozwiązań opracowanych w tym zakresie w Polsce

Królikowski Andrzej

Ochrona przed Korozją

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2025

|

nr 1

19--23

PL

W dwustuletniej historii kolei pojawiały się problemy korozyjne, których rozwiązanie umożliwiało rozwój tego rodzaju transportu. W XIX wieku poważnymi ograniczeniami były naprężeniowe pękanie korozyjne kotłów parowych lokomotyw i zużycie ścierne łożysk kół wagonów. Lista problemów korozyjnych w XX wieku była znacznie dłuższa: korozja infrastruktury wywołana prądami błądzącymi po wprowadzeniu trakcji elektrycznej, hamowanie korozji stalowych wagonów przez stosowanie stali miedziowej i nanoszenie powłok malarskich, korozja cierna śrubowych mocowań szyn do podkładów i korozja galwaniczna w wagonach, w których dochodziło do kontaktu elementów stalowych, aluminiowych i kompozytowych. Opisano, jak walczono z tymi zjawiskami korozyjnymi. Wskazano przykłady rozwiązań przyczyniających się do rozwoju kolejnictwa opracowanych w Polsce i przedstawiono opinię na temat przyszłości kolei.

EN

Throughout the 200-year history of railways, numerous corrosion issues have emerged, making the prevention of related damage essential for the advancement of this mode of transportation. In the 19th century, significant challenges arose from stress corrosion cracking in vapor boilers and the abrasive wear of bearings in carriage wheels. The list of corrosion problems in the 20th century expanded considerably, including infrastructure corrosion caused by stray currents following the introduction of electric traction, the inhibition of rust in steel carriages through the use of copper steel and paint coatings, fretting corrosion of bolted tie plates on railroad rails, and galvanic corrosion in carriages where steel, aluminium, and composite parts come into contact. Effective control measures were implemented to address these types of corrosion damage. Furthermore, the contributions of Polish innovations to railway history and perspectives on the future of this mode of transportation were also discussed.

5

Railway Transport Infrastructure on the Eastern Flank of NATO and of Romania

Nică Ioan Flaviu

Inżynieria Mineralna

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2025

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Vol. 2, no. 2

art. no. 108

EN

The paper presents the Romanian perspective for the international and national context of the railway transport infrastructure on the Eastern Flank of North – Atlantic Treaty Organization – NATO in the context of an overlap with the border of European Union and also, the new Schengen border. Major connections and junction points on the railway transport infrastructure near the border are studied. The research is the base for a developing map that aims to analysis the major points of railway transport infrastructure, the entire research is made by civilians with open-source information. The results will ensure a general view of the railway transport infrastructure in national and international context. A country at the edge of the European Union, a Schengen border and not least, the first line of the NATO border has a great responsibility, presents numerous risks and needs to be sustained due to the new resettlement of influence spheres in the world and in the European continent.

6

Zarządzanie pasażerskim transportem kolejowym w Polsce w czasie wybuchu konfliktu na Ukrainie w 2022 r.

Czerniak Robert

Gospodarka Materiałowa i Logistyka

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2025

|

nr 2

35--41

PL

Dzień 24 lutego 2022 r. stał się nie tylko symboliczną datą eskalacji konfliktu rosyjsko-ukraińskiego, ale także początkiem bezprecedensowej, międzynarodowej operacji logistycznej, której celem było przetransportowanie uchodźców z przejść granicznych w Przemyślu i Dorohusku na teren całej Polski oraz do państw sąsiednich. W krótkim czasie konieczne było wdrożenie szeroko zakrojonych działań organizacyjnych, obejmujących współpracę wszystkich kategorii przewoźników kolejowych – krajowych (dalekobieżnych i regionalnych), samorządowych, prywatnych oraz międzynarodowych (m.in. z Czech, Niemiec, Litwy, Austrii, Szwajcarii). Koordynację całego przedsięwzięcia powierzono spółce PKP Intercity, która w dniu wybuchu konfliktu powołała sztab kryzysowy odpowiedzialny za skoordynowanie przewozów uchodźców z wykorzystaniem taboru wszystkich dostępnych operatorów kolejowych. Działania te realizowane były we współpracy z władzami wojewódzkimi i samorządowymi w kraju oraz w porozumieniu z partnerami międzynarodowymi. Kluczowe było również zaangażowanie zarządców infrastruktury kolejowej w Polsce i państwach ościennych, co umożliwiło utrzymanie obowiązującego rozkładu jazdy mimo znaczącego zwiększenia liczby uruchamianych połączeń. Oprócz regularnych przewozów pasażerskich dla uchodźców uruchomiono także specjalne połączenia sanitarne i humanitarne – pociągi te tworzyły konwój transportowy dla rannych oraz dostaw pomocy humanitarnej do przejść granicznych z Ukrainą. Równolegle rozpoczęto operację kolejowego przewozu ładunków, obejmującą dostawy wsparcia humanitarnego i wojskowego.

EN

24 February 2022 became not only the symbolic date of the escalation of the Russian-Ukrainian conflict, but also the beginning of an unprecedented international logistics operation aimed at transporting refugees from the border crossings in Przemyśl and Dorohusk to the entire territory of Poland and to neighboring countries. In a short time, it was necessary to implement extensive organizational activities, including the cooperation of all categories of rail carriers – domestic (long-distance and regional), local government, private and international (from the Czech Republic, Germany, Lithuania, Austria, Switzerland, among others). The coordination of the entire undertaking was entrusted to PKP Intercity, which on the day the conflict broke out established a crisis team responsible for coordinating the transport of refugees using the rolling stock of all available rail operators. These activities were carried out in cooperation with provincial and local government authorities in the country and in agreement with international partners. The involvement of rail infrastructure managers in Poland and neighboring countries was also crucial, which made it possible to maintain the current timetable despite the significant increase in the number of connections launched. In addition to regular passenger transport for refugees, special sanitary and humanitarian connections were also launched – these trains created a transport convoy for the wounded and deliveries of humanitarian aid to the border crossings with Ukraine. In parallel, a rail freight transport operation was launched, including deliveries of humanitarian and military support.

7

"Pociąg" do geotechniki : rynek szykuje się na intensywny czas w inwestycjach kolejowych

Madej Łukasz

Geoinżynieria : drogi, mosty, tunele

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2025

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nr 4

40--43

PL

Z tekstu dowiesz się: jakie największe zadania PKP PLK zaplanowały w 2026 r., jakie technologie wzmacniania podłoża są dziś standardem w inwestycjach kolejowej spółki, jak współpraca projektantów, laboratoriów i firm specjalistycznych wpływa na dobór technologii.

8

Theoretical assessment of operating parameters in diesel railway engine converted to hydrogen fuel

Dumenko Petro, Prokhorenko Andriy, Smigins Ruslans, Kravchenko Serhii, Vrublevskyi Oleksandr

Diagnostyka

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2025

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Vol. 26, No. 4

art. no. 2025414

EN

This paper presents a theoretical evaluation of operating-parameter changes in a Cummins NTA855-R4 diesel engine converted to spark-ignited hydrogen operation. The objective is to quantify the attainable specific engine power after conversion and to characterise the accompanying shifts in combustion dynamics and mechanical loading. Thermodynamic modelling with parametric sweeps indicates that hydrogen increases peak cylinder pressure and pressure-rise rate, while a like-for-like conversion tends to reduce effective power. When internal mixture formation is applied, the indicated and brake efficiencies rise by approximately 7-10%. Complete substitution of diesel with hydrogen is achievable without power loss when using external mixture formation (port fuel injection) at lean excess-air ratios (λ ≈ 2–3). However, the correspondingly rapid heat release can elevate loads on the crank-train, necessitating careful control of combustion phasing and pressurerise limits to protect reliability and durability.

9

Steam locomotive depot on a siding - urban potential of railway wasteland

Balcer-Zgraja Małgorzata

Architecture Civil Engineering Environment

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2025

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Vol. 18, no. 2

37--48

EN

Within a project: “A Vision of Multifunctional Mobility and Service Structure on the Basis of the Facilities of the Former Steam Locomotive Depot in the City of Katowice”, a variant study was performed to investigate the possibilities of adaptation of a neglected, technical monument in Silesia to the needs of a city centre. It was conducted by the Faculty of Architecture, at the Silesian University of Technology in 2024. The investigations searched for methods of an effective “invisible stitching” of the urban tissue gashed with rail tracks [1] based on old railway buildings. It was revealed that the depot area had great potential in the process of revitalizing public space. In the context of the progressive destruction of the monument, the words of Heinrich Heine (1843): The railway kills space, and all we have left is time [2] take on new meaning. Methods: literature and desk research, in-situ investigations and design research. The point of departure for this study was: preparation of the site inventory as well as results of the survey presented by the Association “Congress for the Protection of Monuments” - the partner of the project.

10

Non-standard risk model for applications in railway transport

Gill Adrian

Zeszyty Naukowe. Transport / Politechnika Śląska

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2024

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z. 124

63--75

EN

In risk management in railway transport, standard risk models are usually used based on its typical definition and discrete quantification. This approach allows for easy justification of the adopted model, most often by referring to appropriate norms or standards (such as IRIS). The scientific approach does not disqualify the practical use of standard risk models, but its disadvantages (especially typical risk matrices, including their subjectivity) are increasingly being pointed out. In risk management procedures, most frequently one model is used to assess the risk of all identified hazards. This may turn out to be a mistake, considering the specific characteristics of the hazards. A risk model applied to one hazard may not be adequate to assess the risk of another. Therefore, it should be individually adapted both in terms of variables and the ranges of their measurement values. For some hazards, it will even be necessary to develop or adopt non-standard models. The aim of the article is to present non-standard risk models that provide a base for their easy implementation in safety management procedures used by railway entities.

11

Analiza dostępności transportu kolejowego na terenie miasta Chorzów

Janowiec Filip, Soboń Mariusz, Kurzydło Michał

Transport Miejski i Regionalny

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2024

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nr 10

3--9

PL

W artykule przedstawiono analizę dostępności pieszej do przystanków i stacji kolejowych na terenie miasta Chorzów, uwzględniając zmiany związane z modernizacją linii kolejowej nr 131. W ramach analizy dokonano charakterystyki poszczególnych kolejowych punktów wymiany podróżnych. Uwzględniono przy tym różne elementy związane z miejscami obsługi pasażerów oraz bezpośrednie ich otoczenie mające wpływ na bezpieczeństwo, komfort oraz sposób przemieszczania się i zachowywania w danej przestrzeni. Na podstawie oceny przestrzennej określonych obszarów możliwe było przeprowadzenie analizy dostępności dla wskazanych punktów odpraw podróżnych. Prace oparto na założeniu, że badania będą porównywać wygląd sieci kolejowej i stacji przed rozpoczęciem przebudowy linii kolejowej nr 131 z jej stanem po zakończeniu modernizacji, kiedy utworzony zostanie docelowy układ stacji i przystanków na terenie Chorzowa. Wyniki analizy dostępności pozwoliły na zaprezentowanie możliwości rozwoju transportu kolejowego, a także przedstawienie propozycji zmian w nowym układzie sieci kolejowej w mieście. Propozycje te dotyczą zarówno istniejących, jak i modernizowanych oraz nowo powstałych stacji/przystanków kolejowych, a także nowych lokalizacji, które mogą przyczynić się do zwiększenia dostępności do transportu kolejowego. Dodatkowo wskazano na inne działania, które warto wdrożyć, aby wpłynąć na popra wę dostępności pieszej do pasażerskiej infrastruktury punktowej.

EN

The article analyses pedestrian accessibility to train stops and stations within the city of Chorzów, taking into account changes related to the modernization of railway line No. 131. The analysis includes short description of train stations and stops. Various elements related to passenger service areas and their immediate surroundings affecting safety, comfort and the way of moving and behaving in space were taken into account. Based on the spatial evaluation of the areas, it was possible to analyse accessibility for passenger service points. The research was based on the assumption that the study would compare the appearance of the rail network and stations before the start of the reconstruction of rail line No. 131 with its condition after the completion of the modernisation, when the target system of train stations and stops in Chorzów will be created. The results of the accessibility analysis made it possible to present opportunities for the improvement of rail transport, as well as to make suggestions for changes in the rail network system in the city. Other improvements that can be made to affect pedestrian accessibility to rail passenger point infrastructure are also indicated.

12

Propagacja drgań wywołanych oddziaływaniem linii kolejowej nr 353 na budynek mieszkalny

Bogacz Piotr

Przegląd Budowlany

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2024

|

R. 95, nr 7

80--82

PL

Drgania występujące w gruncie, pochodzące od taboru kolejowego mają bardzo duże znaczenie w procesie projektowania oraz eksploatacji obiektów budowlanych zlokalizowanych bezpośrednio przy linii kolejowej. Analiza wielokryterialna zależności drgań powierzchniowych i drgań wgłębnych od różnych parametrów pozwala na określenie wytycznych w procesie inwestycyjnym. Wykonane pomiary uwzględniły propagację fal w zależności od rodzaju taboru kolejowego. Wyniki pokazują, że tonaż oraz wiek, a co za tym idzie – zastosowana technologia amortyzacji – mają bardzo duży wpływ na drgania podłoża gruntowego.

EN

Vibrations occurring in the ground and coming from trains are very important in the design and use of buildings located directly next to the railway line. Multi-criteria analysis of the dependence of surface vibrations and deep vibrations on various parameters allows for the definition of guidelines in the investment process. The measurements taken took into account wave propagation depending on the type of rolling stock. The results show that the tonnage and age, and therefore the amortization technology used, have a very large impact on the ground vibrations.

13

Determination of directional angle of a railway route and curvature of the railway track axis on high-speed railways

Koc Władysław

Problemy Kolejnictwa

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2024

|

Z. 202

99--111

EN

The paper describes the assumptions underlying two new calculation methods: the determination of the directional angle of a railway route and the determination of the curvature of a railway track axis. These methods use measurement data in the form of Cartesian coordinates of the track axis (obtained during the survey), while the basis for the calculation is the identification of a virtual chord projected in a horizontal plane, which connects two points on the track axis. The key role for the calculation is played here by the determined slope of the tangent to the track axis. Subsequently, an attempt was made to test the extent to which these methods correspond to the conditions specific for high-speed railways. This was illustrated using two calculation examples involving geometric layouts for speeds of 260 km/h and 350 km/h. In order to keep the applicability to reality to a greater extent, a decision was made to obtain hypothetical measurement data by virtual modification of these layouts. Qualitatively, the results of the analysis carried out were no different from previous analyses relating to standard railways. In particular, they confirmed beyond doubt the suitability of the methods considered for determining the directional angle of the railway route and determining the curvature of the railway track axis on high-speed railways. As shown, for use on these railways, a chord length of lc = 100 m should be recommended.

14

Estimating of efficiency based on different modes of transportation for OECD countries : bootstrap DEA

Manavgat Gökçe, Demirci Ayhan

LogForum

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2024

|

Vol. 20, no. 4

515--535

EN

Background: The purpose of this study is to compare transportation efficiency across four modes of transport for OECD countries, considering key operational factors affecting efficiency, as well as environmental and economic perspectives. Methods: This study employs the bootstrap Data Envelopment Analysis (DEA) approach to evaluate the performance of OECD countries' transportation sectors. Bias-corrected efficiency scores are used to ensure more robust and consistent results in cross-country comparisons. Results: The findings reveal that the most efficient countries vary by transport mode (road, sea, rail, and air). Road transport exhibits the lowest average efficiency score among OECD countries, while rail transport exhibits the highest. For road transport, Canada, France, and the United Kingdom have high-efficiency scores with low bias values, while Iceland attains a bias-corrected full efficiency score without bias. In maritime transportation, Canada, Australia, Finland, and Germany achieve high-efficiency scores. For rail transport, the most efficient countries are Australia, Canada, Greece, and Luxembourg, while for air transport, Canada, Chile, and Latvia exhibit high-efficiency bias-corrected scores. The study also identifies that reducing carbon emissions and increasing infrastructure investments are key factors influencing efficiency scores. Conclusion: To enhance transportation efficiency, particularly in road transport, priority should be given to investments that promote intermodal transport and improve system integration. Additionally, incorporating sustainability and environmental practices can significantly improve efficiency across all modes.

15

The Concept of Monitoring Landslides Along the Railway Track Located in the Carpathian Flysch

Kogut Janusz P., Pilecka Elżbieta, Szwarkowski Dariusz

Inżynieria Mineralna

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2024

|

Vol. 2, no. 2

art. no. 51

EN

In the paper, the problem of monitoring of landslides located along the railway track is considered. Railway tracks lying along the slope are exposed to the risk of soil mass movements, especially in areas with a relatively steep slopes and a specific subgrade such as Carpathian flysch. Developing the railway infrastructure on such a slope requires sometimes the cutting of the slope. As a consequence of the change in the shape of the slope surface the subsidence of part of the soil may result in the loss of stability. Based on the numerical analysis the critical stage values applied in the monitoring system have been computed.

PL

W artykule rozważany jest problem monitorowania osuwisk zlokalizowanych wzdłuż toru kolejowego. Tory kolejowe leżące wzdłuż stoku są narażone na ryzyko ruchów masy gruntowej, szczególnie w obszarach o stosunkowo st steepych stokach oraz o specyficznym podłożu, takim jak karpacki flisz. Rozwój infrastruktury kolejowej na takim stoku wymaga czasami cięcia stoku. W wyniku zmiany kształtu powierzchni stoku osunięcie części gruntu może wiązać się z utratą stabilności. Na podstawie analizy numerycznej obliczono krytyczne wartości etapu zastosowane w systemie monitorującym.

16

Technical aspects of the selection of an engine-generator set for a dual-drive locomotive

Michalak Piotr, Urbański Patryk, Jakuszko Wojciech, Gallas Dawid, Stobnicki Paweł, Tarnawski Piotr

Combustion Engines

|

2024

|

R. 63, nr 2

97--105

EN

The use of dual-drive rolling stock is a relatively new solution in the railway market. Vehicles with such type of powertrain are more versatile because it combines the advantages of using diesel vehicles and electric vehicles that consume energy from overhead electric traction. The concept of using such vehicles is highly innovative and has many advantages. However, the design and construction process is more complicated and requires more work than in the case of conventional systems. This article presents the methodology and process of selecting an engine-generator set for a dual-drive locomotive. Indicators and procedures crucial in the process of selecting a dual-drive system for a locomotive, were described and evaluated. All the above mentioned in the work were used during the real design process of a fully Polish locomotive with both diesel and electric drives. The locomotive in Diesel mode was to have an output power of circa 1560 kW for cargo transport. Calculations for the locomotive's power balance are included, showing power losses in the system and for locomotive's own needs. It has been shown that in cargo transport 77% of the maximum engine power is used as tractive power, and in passenger transport 58.6%.

17

Theoretical basics of the self-learning system of intelligent locomotive decision support systems

Gorobchenko Oleksandr, Holub Halyna, Zaika Denys

Archives of Transport

|

2024

|

Vol. 71, iss. 3

169--186

EN

Analysis of works in the field of artificial intelligence allows to make an assumption that today there is a sufficiently developed theoretical basis for the development of intelligent control systems for locomotive control. This will mini mize the risks associated with the human factor on the railways. The paper presents the theoretical rationale for the development of a knowledge base for intelligent locomotive control systems. The approach and structure of the self learning system of intelligent DSS is proposed, the advantage of which is the presence of a fuzzy classifier that works according to the set criteria and determines a fuzzy image of the current train situation. Learning a fuzzy classifier consists in finding a vector K that minimizes the distance between the results of logical inference and experimental data from the sample. The knowledge base is implemented using linguistic variables formalized by methods of fuzzy logic. The use of linguistic values makes it possible to design the base using the usual language of communication, which greatly simplifies both the design process itself and the analysis of the system's performance. Also, the knowledge base has the possibility of constant self-improvement. This happens in two ways. The first is by adding new rules to the knowledge base in case the current situation does not match the existing ones in the base, in which case an additional rule is created and checked for adequacy. The second way is a mechanism for ranking rules in the knowledge base. If the control action of the locomotive driver coincided with the recommendation of DSS in the current situation, then the rating of this recommendation (rule) increases, and in the future the rule selection algorithm will choose one or another control action for the current situation that has the highest rating (that is, it has already been verified several times person). The experiment has shown that the use of intelligent DSS has positive results. On aver age, the DSS made the correct train control decisions faster than the locomotive driver.

18

Influence of Abrasive Waterjet Parameters on Surface Quality and Material Removal in WNiFe Tungsten Alloy

Dekster Lisa

Advances in Science and Technology. Research Journal

|

2024

|

Vol. 18, no. 6

351--360

EN

Abrasive Waterjet (AWJ) milling effectively processes high-strength materials like WNiFe tungsten alloy without altering their properties. This study investigates the effects of jet pressure, traverse speed, and abrasive mass flow rate on the machining performance. The results indicate that increasing jet pressure significantly enhances groove depth, with higher pressures leading to more aggressive material removal. Conversely, higher traverse speeds reduce groove depth, emphasizing the need for slower speeds for deeper penetration. Increased abrasive mass flow rates also significantly improve groove depth but pose challenges related to material wear and cost. Surface analysis using scanning electron microscopy (SEM) revealed that higher jet pressures and lower traverse speeds produce smoother surfaces and more distinct grooves. The findings highlight the importance of optimizing AWJ parameters to achieve efficient material removal and desired groove geometries. This research provides valuable insights for improving AWJ machining of tungsten alloys in industrial applications.

19

Fault Detection and Diagnostic Methods for Railway Systems – A Literature Survey

Wróbel Jakub, Bury Paweł, Zając Mateusz, Kierzkowski Artur, Tubek Sławomir, Blaut Jędrzej

Advances in Science and Technology. Research Journal

|

2024

|

Vol. 18, no. 6

361--391

EN

This paper presents a systematic literature survey on diagnostic methods used for railway materials and systems. The authors analyze various railway accident reports, focusing on the types of failures described and their causes. Previous review papers have addressed various aspects of railway systems diagnostics; however, most of the existing research focuses on specific parts of the rail vehicle or subsystems. In contrast, this survey focuses on railway diagnostic systems rather than general diagnostic methods used in mechanical and electrical engineering. The authors classify the types of failures and diagnostic methods that are used in rail transport into two categories: infrastructure and rolling stock. The purpose of this paper is to systematize the types of failure that occur in railway transport systems; identify the state-of-the-art means and methods of diagnostics in railway materials and systems, with particular focus on new research findings; and identify trends and possible research gaps in need of further development.

20

Praktyczne wykorzystanie wodoru jako strategicznego nośnika energii na przykładzie sektora kolejowego

Beroud Alan

Przegląd Komunikacyjny

|

2023

|

R. 78, nr 1

4--8

PL

W artykule autor omawia i analizuje założenia polityki klimatycznej i energetycznej UE. Wskazuje także oraz opisuje stan i perspektywy polskiego sektora energetycznego w kontekście wykorzystania nowych źródeł energii. W publikacji znalazły się - poparte obliczeniami - argumenty za wykorzystaniem wodoru jako strategicznego źródła energii na przykładzie sektora kolejowego.

EN

In the article, the author submits and analyzes the assumptions of the EU climate and energy policy. He also indicates and describes the condition and prospects of the Polish energy sector in the context of the use of new energy sources. The publication includes - supported by calculations - arguments for the use of hydrogen as a strategic energy source on the example of the railway sector.