Search for dissertations about: "railway mechanics"

Showing result 16 - 20 of 67 swedish dissertations containing the words railway mechanics.

  2. 16. 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

  4. 17. Thermomechanical behaviour of tread braked wheels

    Author : Eric Landström Voortman; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; thermomechanical analysis; high temperature testing; thermal analysis; full-scale brake rig testing; tread braking; Railway wheels; finite element analysis;

    Abstract : Tread brakes, also known as block brakes, are a type of friction brakes commonly used in the railway industry. They are a low-cost and low-maintenance solution compared to more complicated systems such as disc brakes or electrodynamic brakes. READ MORE

  5. 18. Finite element procedures for crack path prediction in multi-axial fatigue

    Author : Dimosthenis Floros; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fracture mechanics; Configurational forces; Mixed-mode; Numerical simulation; Rolling contact fatigue; Plasticity;

    Abstract : Rolling Contact Fatigue (RCF) cracks in rails are among the most detrimental railway track defects regarding reliability and cost. The cracks typically grow in shear mode up to a certain length at which they might arrest or kink into a more tensile-driven growth. READ MORE

  6. 19. On the Modelling of Train Induced Ground Vibrations with Analytical Methods

    Author : Anders Karlström; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ground vibrations; train; wave propagation; dynamic flexibility; trench; railway track; vibration isolation; wave barrier; soil-structure interaction;

    Abstract : A novel analytical approach to model train induced ground vibrations is proposed. Integral transform solutions are combined with series solutions to obtain fast numericalalgorithms, where a particular designed boundary condition for finite regions is seen to enable the solution procedure. READ MORE

  7. 20. Simulation of vertical dynamic interaction between railway vehicle and slab track

    Author : Emil Aggestam; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; transition zones; genetic algorithm; dynamic vehicle–track interaction; Slab track; modelling; ballasteless track;

    Abstract : The usage of slab track for high-speed railway lines has increased in recent decades. In Sweden, the building of new railway lines for higher speed and the selection of track design for such lines are currently being debated. READ MORE