University of Twente Student Theses
Description of 3 RET Metro Wheel Set Components. Multicriteria Analysis of the failures of these components
Gongadze Gogvadze, T. (2018) Description of 3 RET Metro Wheel Set Components. Multicriteria Analysis of the failures of these components.
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| Abstract: | This internship has three main parts. The description of the three studied elements of the bogie, a multicriteria analysis of the failures regarding these components and an advice on possible solutions or improvements to reduce the impact of these failures. In the description a general overview of bogies at RET is given and the three components and its failures are described. The primary suspensions, the oil dampers and the flexible coupling are the three described components. The primary suspension has 2 main failures which are the rubber shrinking and the rubber getting loose, the oil damper has a main failure which consists of the oil leakage and the failure studied for the flexible coupling is the cracking of the elastic rubber element. The second part consists of a multicriteria analysis which compares the 4 mentioned failures according to 9 main criteria which are: the costs associated to failure, the downtime due to failure, the safety , the lead time for receiving new parts, the maintenance of each component, the predictability of failure, the frequency, the damage caused and the monitoring possibilities. To do this analysis a strict process is followed and the results are analysed accordingly. Defining criteria, performing a qualitative analysis, scaling criteria and giving relative importance to them and making a quantitative analysis are the 4 main steps in the process of arriving to a numerical result for the multicriteria analysis. The last part consists on giving advice and solution to the main problems that each component faces due to according to the analysis and advice on a possible solution or further research option. In the case of the primary suspension, a condition monitoring system can be considered, for the oil dampers a change in replacement conditions can be applied and for the cracking rubber elements of the coupling modifying the maintenance actions is an option. |
| Item Type: | Internship Report (Master) |
| Faculty: | ET: Engineering Technology |
| Programme: | Mechanical Engineering MSc (60439) |
| Keywords: | Metro wheel sets, Primary suspension, Shock absorber damper, Flexible coupling, Failures, Maintenance, Multicriteria analysis |
| Link to this item: | https://purl.utwente.nl/essays/85380 |
| Export this item as: | BibTeX EndNote HTML Citation Reference Manager |
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