Yohannes, Theodros (2015) Effect of Track Stiffness Variation on the Dynamic Response of Passenger Vehicle. Masters thesis, Addis Ababa University.
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Abstract
This paper investigates the effect of track stiffness variation on the dynamic behavior of a railway passenger vehicle. For the analysis, MBS model of the vehicle and the track was developed using SIMPACK software. Two models are developed, one with constant track stiffness and the other with variable track stiffness. The simulation was done on a straight track with no irregularity of rails and wheels. Track stiffness variation may have different causes, however in this research track stiffness variation caused by sleeper spacing was considered. The dynamic characteristic of railway vehicle greatly depends on the motion of the vehicle. To consider this, the models are allowed to move in three different velocity profiles i.e. the motion of the vehicle during service braking, emergency braking and taking greater acceleration and deceleration values. For all velocity profiles the outputs of the simulations showed, the vertical and lateral accelerations and displacements of the car body are greater during variable track stiffness case. However, the simulation results for the bogie frame showed an increase in some cases and decrease in the other. From these outputs we can conclude that, track stiffness variation increases the vertical as well as the lateral displacement and acceleration of the car body and it may not have effect on the bogie frame.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Mechanical and Industrial Engineering |
| Subjects: | H Social Sciences > HD Industries. Land use. Labor > HD28 Management. Industrial Management T Technology > TF Railroad engineering and operation T Technology > TJ Mechanical engineering and machinery |
| Divisions: | Africana |
| Depositing User: | Andriamparany Edilbert RANOARIVONY |
| Date Deposited: | 24 Oct 2018 08:52 |
| Last Modified: | 24 Oct 2018 08:52 |
| URI: | http://thesisbank.jhia.ac.ke/id/eprint/7039 |
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