Change search
Link to record
Permanent link

Direct link
BETA
Arasteh Khouy, Iman
Alternative names
Publications (10 of 17) Show all publications
Soleimanmeigouni, I., Ahmadi, A., Arasteh Khouy, I. & Letot, C. (2018). Evaluation of the effect of tamping on the track geometry condition: a case study (ed.). Proceedings of the Institution of mechanical engineers. Part F, journal of rail and rapid transit, 232(2), 408-420
Open this publication in new window or tab >>Evaluation of the effect of tamping on the track geometry condition: a case study
2018 (English)In: Proceedings of the Institution of mechanical engineers. Part F, journal of rail and rapid transit, ISSN 0954-4097, E-ISSN 2041-3017, Vol. 232, no 2, p. 408-420Article in journal (Refereed) Published
Abstract [en]

Tamping is one of the major activities applied by railway maintenance managers to recover track geometry condition. Modelling the tamping effectiveness along with track geometry degradation is essential for long term prediction of track geometry behaviour. The aim of this study is to analyse theeffect of tamping on the different track geometry measures, i.e. longitudinal level, alignment and cant; on the basis of inspection car records from a part of Main Western Line in Sweden. To model recovery after tamping a probabilistic approach is applied. The track geometry condition before tamping was considered as the dominant factor for modelling the model parameters. Correlation analysis has performed to measure the linear relation between the recoveries of the different geometry measures. The results show a moderate correlation between the recovery of the longitudinal level and that of the cant, and a weak correlation between the recovery of the longitudinal level and that of the alignment. Linear regression and Wiener process are also applied to model track geometry degradation and to obtain degradation rates. Theeffect of tamping on degradation rate is analysed. It is observed that the degradation rate was increased after tamping intervention.  

Place, publisher, year, edition, pages
Sage Publications, 2018
National Category
Other Civil Engineering
Research subject
Operation and Maintenance
Identifiers
urn:nbn:se:ltu:diva-15883 (URN)10.1177/0954409716671548 (DOI)000424780200006 ()f7391512-a026-4e7c-a4d0-96223a5957dd (Local ID)f7391512-a026-4e7c-a4d0-96223a5957dd (Archive number)f7391512-a026-4e7c-a4d0-96223a5957dd (OAI)
Note

Validerad;2018;Nivå 2;2018-02-12 (svasva)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2019-08-21Bibliographically approved
Minbashi, N., Bagheri, M., Golroo, A. & Arasteh Khouy, I. (2017). Geometrical Degradation Analysis of Railway Turnouts Using Power Spectral Density. Journal of transportation engineering, 143(8), Article ID 04017035.
Open this publication in new window or tab >>Geometrical Degradation Analysis of Railway Turnouts Using Power Spectral Density
2017 (English)In: Journal of transportation engineering, ISSN 0733-947X, E-ISSN 1943-5436, Vol. 143, no 8, article id 04017035Article in journal (Refereed) Published
Abstract [en]

This paper examines the application of power spectral density (PSD) in turnout geometrical degradation analysis. Power spectral density in the form of a continuous curve can show track irregularities through wavelength and amplitude. The longitudinal level parameter measurements of four turnouts from Swedish railways are selected. ProVal software is used for PSD implementation. The PSD curves of the actual measurements are compared to PSD standards programmed in MATLAB. The results show that PSD can demonstrate turnout geometrical condition by means of wavelength and spectral density, providing more information regarding the nature of faults in turnouts. It is also able to demonstrate the condition of turnout sections separately and determine which section needs corrective maintenance. Thus, using PSD helps identify the need for corrective maintenance more precisely; this type of maintenance is important because it deals with safety-related defects. The knowledge obtained by PSD is helpful when planning corrective maintenance activities to rectify geometrical faults in turnouts of a line, reducing the time and money spent on maintenance

Place, publisher, year, edition, pages
American Society of Civil Engineers, 2017
National Category
Other Civil Engineering
Research subject
Operation and Maintenance
Identifiers
urn:nbn:se:ltu:diva-63099 (URN)10.1061/JTEPBS.0000056 (DOI)000417333200004 ()2-s2.0-85044942868 (Scopus ID)
Note

Validerad; 2017; Nivå 2; 2017-05-11 (andbra)

Available from: 2017-04-20 Created: 2017-04-20 Last updated: 2018-11-20Bibliographically approved
Arasteh khouy, I., Larsson-Kråik, P.-O., Nissen, A. & Kumar, U. (2016). Cost-effective track geometry maintenance limits (ed.). Proceedings of the Institution of mechanical engineers. Part F, journal of rail and rapid transit, 230(2), 611-622
Open this publication in new window or tab >>Cost-effective track geometry maintenance limits
2016 (English)In: Proceedings of the Institution of mechanical engineers. Part F, journal of rail and rapid transit, ISSN 0954-4097, E-ISSN 2041-3017, Vol. 230, no 2, p. 611-622Article in journal (Refereed) Published
Abstract [en]

In the past, railway maintenance actions were usually planned based on the knowledge and experience of the infrastructure owner. The main goal was to provide a high level of safety, and there was little concern about economic and operational optimisation issues. Today, however, a deregulated competitive environment and budget limitations are forcing railway infrastructures to move from safety limits to cost-effective maintenance limits to optimise operation and maintenance procedures. By so doing, one widens the discussion to include both operational safety and cost-effectiveness for the whole railway transport system. In this study, a cost model is proposed to specify the cost-effective maintenance limits for track geometry maintenance. The proposed model considers the degradation rates of different track sections and takes into account the costs associated with inspection, tamping, delay time penalties, and risk of accidents due to poor track quality. It draws on track geometry data from the Iron Ore Line (Malmbanan) in northern Sweden, used by both passenger and freight trains, to estimate the geometrical degradation rate of each section. The methodology is based on reliability and cost analysis and facilitates the maintenance decision-making process to identify cost-effective maintenance thresholds.

National Category
Other Civil Engineering
Research subject
Operation and Maintenance
Identifiers
urn:nbn:se:ltu:diva-13030 (URN)10.1177/0954409714542859 (DOI)000368600500021 ()2-s2.0-84954349492 (Scopus ID)c30499d7-d8e8-4d9d-97fc-97cf6ce6eccf (Local ID)c30499d7-d8e8-4d9d-97fc-97cf6ce6eccf (Archive number)c30499d7-d8e8-4d9d-97fc-97cf6ce6eccf (OAI)
Note

Validerad; 2016; Nivå 2; 20140811 (andbra)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Jönsson, J., Arasteh Khouy, I., Lundberg, J., Rantatalo, M. & Nissen, A. (2016). Measurement of vertical geometry variations in railway turnouts exposed to different operating conditions (ed.). Proceedings of the Institution of mechanical engineers. Part F, journal of rail and rapid transit, 230(2), 486-501
Open this publication in new window or tab >>Measurement of vertical geometry variations in railway turnouts exposed to different operating conditions
Show others...
2016 (English)In: Proceedings of the Institution of mechanical engineers. Part F, journal of rail and rapid transit, ISSN 0954-4097, E-ISSN 2041-3017, Vol. 230, no 2, p. 486-501Article in journal (Refereed) Published
Abstract [en]

Turnouts are critical units in a railway system; they perform the switching procedure that allows trains to change between routes. Monitoring the track geometry of a turnout is necessary for maintenance planning and design optimisation. Monitoring is usually done by track recording cars, however, to isolate the ageing and dynamic behaviour of the track it is also necessary to study the unstressed track geometry of the turnouts. Such measurements can be used to develop degradation models to optimise maintenance and design, thereby increasing availability and reducing life cycle cost. This paper introduces a new method to measure the vertical position of the track geometry over time during non-operational conditions (unstressed) to show track degradation. The new method includes a smart system that uses relative measurement reference points to create a better accuracy and lower costs compared with fixed reference points. It evaluates various types of measurement equipment and uses levelling equipment to measure the unstressed vertical geometry of 13 turnouts located on Swedish railway lines, with three follow-up measurements over a year and a half. The turnouts were categorised into four groups: based on their accumulated capacity in million gross tonnes (MGT) and whether they were on a straight or curved main track. Surprisingly, the first three measurements showed the geometry of turnouts on the straight main track to have a vertical elevation tendency towards the mid-section, whereas the turnouts on the curved main track had a general vertical downwards bend tendency towards the mid-section. The results also showed that a higher capacity in MGT has a greater influence on track geometry changes over time.

National Category
Other Civil Engineering
Research subject
Operation and Maintenance
Identifiers
urn:nbn:se:ltu:diva-3778 (URN)10.1177/0954409714546205 (DOI)000368600500012 ()2-s2.0-84954348339 (Scopus ID)19c37fcb-d7e4-4f8c-9ab1-f9de483aaf5b (Local ID)19c37fcb-d7e4-4f8c-9ab1-f9de483aaf5b (Archive number)19c37fcb-d7e4-4f8c-9ab1-f9de483aaf5b (OAI)
Note

Validerad; 2016; Nivå 2; 20140821 (andbra)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Minbashi, N., bagheri, M., Golroo, A., Arasteh Khouy, I. & Ahmadi, A. (2016). Turnout Degradation Modelling Using New Inspection Technologies: A Literature Review (ed.). In: (Ed.), Uday Kumar; Alireza Ahmadi; Ajit Kumar Verma; Prabhakar Varde (Ed.), Current Trends in Reliability, Availability, Maintainability and Safety: An Industry Perspective. Paper presented at International Conference ICRESH-ARMS 2015 : 01/06/2015 - 04/06/2015 (pp. 49-63). Encyclopedia of Global Archaeology/Springer Verlag
Open this publication in new window or tab >>Turnout Degradation Modelling Using New Inspection Technologies: A Literature Review
Show others...
2016 (English)In: Current Trends in Reliability, Availability, Maintainability and Safety: An Industry Perspective / [ed] Uday Kumar; Alireza Ahmadi; Ajit Kumar Verma; Prabhakar Varde, Encyclopedia of Global Archaeology/Springer Verlag, 2016, p. 49-63Conference paper, Published paper (Refereed)
Abstract [en]

Turnouts are of the most critical components of railway track which are prone to high static and dynamic forces leading to more intense degradation. They require more inspection than other parts of a railway track as they are potential safety hazards. As a result, turnout degradation processes are crucial to be understood by infrastructure manager to plan for their maintenance and renewal in advance. Two approaches have been introduced in the literature to achieve a thorough understanding of degradation processes in turnouts. The first one acts to develop degradation models based on influential parameters and historical data and then to predict degradation processes in the future; while the second one tries to improve inspection through using new concepts and technologies leading turnout condition data to be better captured over time. The purpose of this paper is to review all available resources regarding these two approaches and provide a guide for further research into turnout studies

Place, publisher, year, edition, pages
Encyclopedia of Global Archaeology/Springer Verlag, 2016
Series
Lecture Notes in Mechanical Engineering, ISSN 2195-4356
National Category
Other Civil Engineering
Research subject
Operation and Maintenance
Identifiers
urn:nbn:se:ltu:diva-39975 (URN)10.1007/978-3-319-23597-4_5 (DOI)eed6dc83-a862-45fa-8476-9da0edc5b6a8 (Local ID)978-3-319-23596-7 (ISBN)978-3-319-23597-4 (ISBN)eed6dc83-a862-45fa-8476-9da0edc5b6a8 (Archive number)eed6dc83-a862-45fa-8476-9da0edc5b6a8 (OAI)
Conference
International Conference ICRESH-ARMS 2015 : 01/06/2015 - 04/06/2015
Note

Godkänd; 2016; Bibliografisk uppgift: Containing selected papers from the ICRESH-ARMS 2015 conference in Lulea, Sweden, collected by editors with years of experiences in Reliability and maintenance modeling, risk assessment, and asset management, this work maximizes reader insights into the current trends in Reliability, Availability, Maintainability and Safety (RAMS) and Risk Management. Featuring a comprehensive analysis of the significance of the role of RAMS and Risk Management in the decision making process during the various phases of design, operation, maintenance, asset management and productivity in Industrial domains, these proceedings discuss key issues and challenges in the operation, maintenance and risk management of complex engineering systems and will serve as a valuable resource for those in the field. ; 20151222 (andbra)

Available from: 2016-10-03 Created: 2016-10-03 Last updated: 2017-11-25Bibliographically approved
Minbashi, N., bagheri, M., Goiroo, A. & Arasteh Khouy, I. (2016). Use of power spectral density for effective turnout geometry maintenance (ed.). Transportation Research Record, 2545, 79-88
Open this publication in new window or tab >>Use of power spectral density for effective turnout geometry maintenance
2016 (English)In: Transportation Research Record, ISSN 0361-1981, E-ISSN 2169-4052, Vol. 2545, p. 79-88Article in journal (Refereed) Published
Abstract [en]

The purpose of this study was to assess the geometrical quality of railway turnouts through application of power spectral density (PSD). PSD in the form of a continuous curve can show turnout irregularities by means of wavelength and amplitude. As a case study, the data related to longitudinal level parameter measurements for four turnouts in the Swedish Railways from 2007 to 2011 were acquired. The PSD curves for these measurements were calculated by means of ProVal software. The PSD curves were compared by PSD standard in a program written in MATLAB and turnout irregularities were determined. The results show that PSD is able to demonstrate the condition of turnouts individually and can also identify the wavelength faults present in different sections of a turnout. More important, PSD can be applied to prioritize maintenance needs of turnouts on the basis of their criticality. Use of PSD can help identify tamping needs more precisely. As a result, the geometrical quality can be restored before the defined maintenance thresholds are exceeded. This maintenance action also would reduce the total downtime, obligatory speed reductions, and maintenance costs

National Category
Other Civil Engineering
Research subject
Operation and Maintenance
Identifiers
urn:nbn:se:ltu:diva-7258 (URN)10.3141/2545-09 (DOI)000378444400009 ()2-s2.0-84975879828 (Scopus ID)59a82fc8-6be4-4f21-b5ed-7d1fc712c901 (Local ID)59a82fc8-6be4-4f21-b5ed-7d1fc712c901 (Archive number)59a82fc8-6be4-4f21-b5ed-7d1fc712c901 (OAI)
Note

Validerad; 2016; Nivå 2; 20160708 (andbra)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Arasteh khouy, I., Schunnesson, H., Juntti, U., Nissen, A. & Larsson-Kråik, P.-O. (2014). Evaluation of track geometry maintenance for heavy haul railroad in Sweden: a case study (ed.). Proceedings of the Institution of mechanical engineers. Part F, journal of rail and rapid transit, 228(5), 496-503
Open this publication in new window or tab >>Evaluation of track geometry maintenance for heavy haul railroad in Sweden: a case study
Show others...
2014 (English)In: Proceedings of the Institution of mechanical engineers. Part F, journal of rail and rapid transit, ISSN 0954-4097, E-ISSN 2041-3017, Vol. 228, no 5, p. 496-503Article in journal (Refereed) Published
Abstract [en]

The measurement and improvement of track quality are key issues in determining both the restoration time and cost of railway maintenance. Applying the optimal tamping strategy helps reduce maintenance costs, making operations more cost effective and leading to increased safety and passenger comfort. In this paper, track geometry data from the iron ore line (Malmbanan) in northern Sweden, which handles both passenger and freight trains, are used to evaluate track geometry maintenance in cold climate. The paper describes Trafikverket’s (Swedish Transport Administration) tamping strategy and evaluates its effectiveness in measuring, reporting, and improving track quality. Finally, it evaluates the performance of the maintenance contractor and discusses the importance of the functional requirements stated in the outsourcing contracts.

National Category
Other Civil Engineering
Research subject
Operation and Maintenance; Mining and Rock Engineering
Identifiers
urn:nbn:se:ltu:diva-14159 (URN)10.1177/0954409713482239 (DOI)000337712000004 ()2-s2.0-84902164482 (Scopus ID)d80b31d7-5d00-4993-ba58-1abd8d7a2bd2 (Local ID)d80b31d7-5d00-4993-ba58-1abd8d7a2bd2 (Archive number)d80b31d7-5d00-4993-ba58-1abd8d7a2bd2 (OAI)
Note

Validerad; 2014; 20130304 (iman)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Arasteh khouy, I., Larsson-Kråik, P.-O., Nissen, A., Lundberg, J. & Kumar, U. (2014). Geometrical degradation of railway turnouts: a case study from a Swedish heavy haul railroad (ed.). Proceedings of the Institution of mechanical engineers. Part F, journal of rail and rapid transit, 228(6), 611-619
Open this publication in new window or tab >>Geometrical degradation of railway turnouts: a case study from a Swedish heavy haul railroad
Show others...
2014 (English)In: Proceedings of the Institution of mechanical engineers. Part F, journal of rail and rapid transit, ISSN 0954-4097, E-ISSN 2041-3017, Vol. 228, no 6, p. 611-619Article in journal (Refereed) Published
Abstract [en]

Turnouts are critical components of track systems in terms of safety, operation and maintenance. Each year, a considerable part of the maintenance budget is spent on their inspection, maintenance and renewal. Applying a cost-effective maintenance strategy helps to achieve the best performance at the lowest possible cost. In Sweden, the geometry of turnouts is inspected at predefined time intervals using the STRIX / IMV 100 track measurement car. This study uses time series for the measured longitudinal level of turnouts on the Iron Ore Line (Malmbanan) in northern Sweden. Two different approaches are applied to analyse the geometrical degradation of turnouts due to dynamic forces generated by train traffic. In the first approach, the recorded measurements are adjusted at the crossing point and then the relative geometrical degradation of turnouts is evaluated by using two defined parameters, the absolute residual area and the maximum settlement, In the second approach, various geometry parameters are defined to estimate the degradation in each measurement separately. The growth rate of the longitudinal level degradation as a function of million gross tonnes / time is evaluated. The proposed methods are based on characterisation of the individual track measurements. The results facilitate correct decision-making in the maintenance process through understanding the degradation rate and defining the optimal maintenance thresholds for the planning process. In the long run, this can lead to a cost-effective maintenance strategy with optimised inspection and maintenance intervals.

National Category
Other Civil Engineering
Research subject
Operation and Maintenance
Identifiers
urn:nbn:se:ltu:diva-10396 (URN)10.1177/0954409713503320 (DOI)000340543500006 ()2-s2.0-84905453748 (Scopus ID)9337a6e8-3571-428f-b45e-10e83537fc4f (Local ID)9337a6e8-3571-428f-b45e-10e83537fc4f (Archive number)9337a6e8-3571-428f-b45e-10e83537fc4f (OAI)
Note

Validerad; 2014; 20130926 (andbra)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Arasteh khouy, I., Larsson-Kråik, P.-O., Nissen, A., Juntti, U. & Schunnesson, H. (2014). Optimisation of track geometry inspection interval (ed.). Proceedings of the Institution of mechanical engineers. Part F, journal of rail and rapid transit, 228(5), 546-556
Open this publication in new window or tab >>Optimisation of track geometry inspection interval
Show others...
2014 (English)In: Proceedings of the Institution of mechanical engineers. Part F, journal of rail and rapid transit, ISSN 0954-4097, E-ISSN 2041-3017, Vol. 228, no 5, p. 546-556Article in journal (Refereed) Published
Abstract [en]

The measurement and improvement of track quality are key issues in determining the time at which railway maintenance must be performed and its cost. Efficient track maintenance ensures optimum allocation of limited maintenance resources which has an enormous effect on maintenance efficiency. Applying an appropriate tamping strategy helps reduce maintenance costs, making operations more cost-effective and leading to increased safety and passenger comfort levels. This paper discusses optimisation of the track geometry inspection interval with a view to minimising the total ballast maintenance costs per unit traffic load. The proposed model considers inspection time, the maintenance-planning horizon time after inspection and takes into account the costs associated with inspection, tamping and risk of accidents due to poor track quality. It draws on track geometry data from the iron ore line (Malmbanan) in northern Sweden, used by both passenger and freight trains, to find the probability distribution of geometry faults.

National Category
Other Civil Engineering
Research subject
Operation and Maintenance; Mining and Rock Engineering
Identifiers
urn:nbn:se:ltu:diva-6706 (URN)10.1177/0954409713484711 (DOI)000337712000008 ()2-s2.0-84902181393 (Scopus ID)4faa72d7-137a-4525-9ebe-c230768fe37c (Local ID)4faa72d7-137a-4525-9ebe-c230768fe37c (Archive number)4faa72d7-137a-4525-9ebe-c230768fe37c (OAI)
Note

Validerad; 2014; 20130422 (andbra)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Arasteh Khouy, I. (2013). Cost-effective maintenance of railway track geometry: a shift from safety limits to maintenance limits (ed.). (Doctoral dissertation). Paper presented at . Luleå: Luleå tekniska universitet
Open this publication in new window or tab >>Cost-effective maintenance of railway track geometry: a shift from safety limits to maintenance limits
2013 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Railway infrastructure is a complex system which comprises different subsystems. Long life span is one of the important aspects of this prime mode of transport. However, the useful life of its assets is highly dependent on the maintenance and renewal strategy used during the assets’ life cycle. Today’s demands on the railway industry call for increased capacity, including more trains, travelling at higher speeds with higher axle loads. This increased usage results in higher degradation of railway assets and higher maintenance costs. Formerly, railway maintenance procedures were usually planned based on the knowledge and experience of the infrastructure owner. The main goal was to provide a high level of safety, and there was little concern for economic issues. Today, however, the deregulated competitive environment and budget limitations are forcing railway infrastructures to move from safety limits to cost-effective maintenance limits to optimise operation and maintenance procedures. The goal is to make operation and maintenance cost-effective while still meeting high safety standards.One of the main parameters to assure railway safety and comfortable railway service is to maintain high quality of track geometry. Poor quality of track geometry, directly or indirectly, may result in safety problems, speed reduction, traffic disruption, greater maintenance cost and higher degradation rate of the other railway components (e.g. rails, wheels, switches and crossings etc.). The aim of this study is to develop a methodology to optimise track geometry maintenance by specifying cost-effective maintenance limits. The methodology is based on reliability and cost analysis and supports the maintenance decision-making process. The thesis presents a state-of-the-art review of track geometry degradation and maintenance optimisation models. It also includes a case study carried out on the iron ore line in the north of Sweden to analyse the track geometry degradation and discuss possible reasons for the distribution of failures along the track over a year. It describes Trafikverket’s (Swedish Transport Administration) maintenance strategy regarding measuring, reporting on and improving track quality, and it evaluates the efficiency of this strategy. It introduces two new approaches to analyse the geometrical degradation of turnouts due to dynamic forces generated from train traffic. In the first approach, the recorded measurements are adjusted at crossing point and then the relative geometrical degradation of turnouts is evaluated by using two defined parameters, the absolute residual area (ARa) and the maximum settlement (Smax). In the second approach, various geometry parameters are defined to estimate the degradation in each measurement separately. It also discusses optimisation of the track geometry inspection interval with a view to minimising the total ballast maintenance costs per unit traffic load. The proposed model considers inspection time and the maintenance-planning horizon time after inspection and takes into account the costs associated with inspection, tamping and risk of accidents due to poor track quality. Finally, it proposes a cost model to identify the cost-effective maintenance limit for track geometry maintenance. The model considers the actual longitudinal level degradation rates of different track sections as a function of million gross tonnes (MGT) / time and the observed maintenance efficiency.

Place, publisher, year, edition, pages
Luleå: Luleå tekniska universitet, 2013
Series
Doctoral thesis / Luleå University of Technology 1 jan 1997 → …, ISSN 1402-1544
National Category
Other Civil Engineering
Research subject
Operation and Maintenance
Identifiers
urn:nbn:se:ltu:diva-26052 (URN)c58b6930-5268-4914-ba33-a92f56468c56 (Local ID)978-91-7439-702-4 (ISBN)978-91-7439-703-1 (ISBN)c58b6930-5268-4914-ba33-a92f56468c56 (Archive number)c58b6930-5268-4914-ba33-a92f56468c56 (OAI)
Note

Godkänd; 2013; 20130814 (iman); Tillkännagivande disputation 2013-08-26 Nedanstående person kommer att disputera för avläggande av teknologie doktorsexamen. Namn: Iman Arasteh Khouy Ämne: Drift och underhållsteknik/Operation and Maintenance Avhandling: Cost-Effective Maintenance of Railway Track Geometry A Shift from Safety Limits to Maintenance Limits Opponent: Professor Peter Veit, Institute of Railway Engineering and Transport Economy, Technical University Graz, Austria Ordförande: Professor Uday Kumar, Institutionen för samhällsbyggnad och naturresurser, Luleå tekniska universitet Tid: Tisdag den 17 september 2013, kl 10.00 Plats: F1031, Luleå tekniska universitet

Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-24Bibliographically approved
Organisations

Search in DiVA

Show all publications