University of Twente Student Theses
Experimental validation and numerical modelling of train-bridge dynamics
Boersma, P. (2023) Experimental validation and numerical modelling of train-bridge dynamics.
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| Abstract: | Structural Health Monitoring (SHM) plays a crucial role in maintenance strategies aimed at ensuring structural health and safety in bridges. While prior research has focused on numerical research, experimental validation of train-bridge dynamics has lagged behind. To enhance the understanding of train-bridge interactions, the overarching goal is to establish an experimental setup and related experiments for validating numerically calculated train dynamics. The realisation of the experimental setup involves scaling down the Boyne Viaduct to a laboratory-scale prototype using the similarity analysis. It has been demonstrated that a relaxed model has proven acceptable behaviour in terms of frequency and mass ratios. The setup was designed based on its intended functions, with concepts evaluated against design requirements and success criteria to identify the optimal concept. Validation of the design against the Boyne Viaduct confirmed compliance with these ratios. To enhance the benchmark numerical model, which comprises a dual suspended mass, link connectors are introduced to realise the bogie model. A more accurate numerical representation of half-train and train models is achieved by incorporating a velocity ramp in the boundary condition and ensuring a neutral position of train components after applying the train body mass. Experimental validation has not yet been completed. Enhancements to the validation are proposed. The current method of determining natural frequencies was found inaccurate, indicating the need for a more precise approach in future studies. |
| Item Type: | Essay (Master) |
| Faculty: | ET: Engineering Technology |
| Subject: | 52 mechanical engineering |
| Programme: | Mechanical Engineering MSc (60439) |
| Link to this item: | https://purl.utwente.nl/essays/97442 |
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