Essays about: "wheel rail contact"

Showing result 1 - 5 of 19 essays containing the words wheel rail contact.

1. 1. Modified train wheel wear calculation for fast calculation

   University essay from KTH/Spårfordon

   Author : Shaoyao Chen; [2021]
   Keywords : Precise contact point detection; Material Flexibility; Multiple contact points detection; Winkler theory; wear calculation; fast calculation; Exakt detektion av kontaktpunkter; materialflexibilitet; detektering av flera kontaktpunkter; Winkler-teori; förslitningsberäkning; snabb beräkning;

   Abstract : In this thesis, a modified wear calculation method is developed to calculate the train wheel wear, which can give less precise but faster results compared to the classic wear calculation method. This modified method is developed based on the classic wear calculation method developed by Jendel, which uses Hertz theory and Kalker’s simplified theory to calculate the contact variables and uses Achard theory to calculate the wear volume in an iterative manner. READ MORE

3. 2. Simulation of air quality in underground train stations

   University essay from KTH/Maskinkonstruktion (Inst.)

   Author : Benjamin Söderberg; [2020]
   Keywords : PM10; aerosols; air pollution; particulate matter; emission factors; underground train station; PM10; luftkvalité; tåg; emissionsfaktorer; underjordiska tågstationer;

   Abstract : Particulate matter (PM) is a widespread air pollutant of microscopic particles that are suspended in the atmosphere. There is high concentration of PM in underground train stations and tunnels. The concentration of particulate matter (PM10) measured in Stockholm’s metro varies significantly between day and nighttime traffic of trains. READ MORE

4. 3. Improvement of Steering Performance of a Two-axle Railway Vehicle via Look-up Tables Estimation

   University essay from KTH/Spårfordon

   Author : Prapanpong Damsongsaeng; [2020]
   Keywords : Two-axle railway vehicle; Active steering system; Look-up tables; Time-varying wheel-rail contact parameters; Två-axligt järnvägsfordon; aktiv styrning; uppslagstabeller; tidsvarierande hjul-rälskontaktparametrar;

   Abstract : A conceptual design of an innovative two-axle lightweight railway vehicle for commuter services is carried out at KTH Railway Group. An active wheelset steering is introduced to improve the curving performance of the vehicle, which is one of the critical performance requirements. READ MORE

5. 4. PREVENTION OF WHEEL WEAR, A CASE STUDY : Developing a functioning wheel profile for rail-mounted transportation trolley.

   University essay from Högskolan i Skövde/Institutionen för ingenjörsvetenskap

   Author : Agnieszka Inglot; Oskar Franzén; [2019]
   Keywords : Wear prediction; Rail; Flanged wheel; Archards model; Hertzian contact problem; Abrasive wear; Adhesive wear; Theorethical prediction model;

   Abstract : This bachelor’s degree project aimed to improve the wheel profile of a rail mounted trolley and determine the cause of wheel failure. The proceedings of this project where modelled after an approach for solving wear problems with an emphasis on designing for sustainability. READ MORE

6. 5. The Effect of Geometrical Contact Input to Wheel-Rail Contact Model

   University essay from KTH/Spårfordon

   Author : Michael Martin; [2018]
   Keywords : Wheel-rail contact; geometrical contact input; contact point search; contact patch; rail vehicle.;

   Abstract : Wheel-rail contact is an important aspect of railway, the forces transferred between the wheel and rail are the one that guide, brake, or accelerate the train, and that is why the understanding of the contact between wheel and rail is an interesting research topic. In this master thesis wheel-rail contact model named ANALYN is used to see the effect of the different geometrical input, like undeformed distance, relative longitudinal curvature, and relative lateral curvature calculation affect the contact patch estimation formed at the wheel-rail contact. READ MORE