Search for dissertations about: "Switches and Crossings"

Showing result 11 - 15 of 16 swedish dissertations containing the words Switches and Crossings.

2. 11. Dynamic Train-Turnout Interaction – Mathematical Modelling, Numerical Simulation and Field Testing

   Author : Elias Kassa; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; contact forces; Karhunen–Loève expansion; dynamic train–turnout interaction; field test; wheel–rail contact geometry; stochastic analysis; switches and crossings; SRA - Transport;

   Abstract : Two models for simulation of dynamic interaction between train and turnout are developed. The first one is derived using a commercial software for dynamics of multi-body systems. READ MORE

4. 12. Railway Infrastructure Robustness : Attributes, evaluation, assurance and improvement

   Author : Per Norrbin; Ragnar Hedström; Luleå tekniska universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Drift och underhållsteknik; Operation and Maintenance Engineering;

   Abstract : According to the European program Horizon 2020, multifaceted challenges in transportinfrastructure include 1) making infrastructure more resilient to keep pace with the increasing mobility needs; 2) reducing the impact of infrastructure on the environment;and 3) dealing with declining resources to maintain and upgrade transport infrastructure. New design and maintenance approaches must be developed to handle these issues, ascurrent methods are inadequate. READ MORE

5. 13. Influence of railway wheel tread damage and track properties on wheelset durability – Field tests and numerical simulations

   Author : Michele Maglio; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; dynamic wheel–rail interaction; axle stresses; railway wheel tread damage; wheelset durability; instrumented wheelset; rail vehicle maintenance; wheel–rail impact loads;

   Abstract : Wheel tread damage leading to high magnitudes of vertical wheel–rail contact forces is a major cause of train delays in the Swedish railway network, particularly during the coldest months of the year. According to regulations, vehicles generating wheel–rail impact loads exceeding the limit values must be taken out of service for wheel maintenance. READ MORE

6. 14. Wayside Condition Monitoring Technologies for Railway Systems

   Author : Matthias Asplund; Ulla Juntti; Luleå tekniska universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Drift och underhållsteknik; Operation and Maintenance Engineering;

   Abstract : The railway is an important mode of transport, due to its environmental friendliness, high safety level, and low energy consumption, among other reasons. Railways provide a sustainable means of transporting a large amount of freight and passengers, in a cost-effective and comfortable way. READ MORE

7. 15. Cost-effective maintenance of railway track geometry : a shift from safety limits to maintenance limits

   Author : Iman Arasteh Khouy; Peter Veit; Luleå tekniska universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Drift och underhållsteknik; Operation and Maintenance Engineering;

   Abstract : 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. READ MORE