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Structural dynamics simulation of a swinging fairground attraction using a novel implementation of reduced order modeling

Blaauw, J.B. (2020) Structural dynamics simulation of a swinging fairground attraction using a novel implementation of reduced order modeling.

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Abstract:This research combines the strengths of modal order reduction, Simscape Multibody and Ansys to come up with a novel method to determine transient stresses in a fairground attraction. Currently, many of these structures are designed using static load cases. This study shows that these load cases can overestimate the stresses greatly in highly dynamic structures. Also, dynamic effects like vibrations within the structure are not considered, possibly resulting in underestimates of the stresses in other places. This method is therefore not suitable for structures like fairground rides. On the other hand, full transient structural analyses are computationally expensive to run. The method outlined in this paper obtains a similar accuracy compared to a full transient study, but by using only a fraction of the computational time. This also enables the model to be used in real time applications of determining the dynamic behavior of structures. Furthermore, as this model is built up within Simulink, the powerful tools within the electrical and control domain provided by Simulink are easy to apply on this structural model. A fairground attraction is used as a practical scenario to apply this method on. The paper concludes by extensively comparing the results of the new method with the load cases and full transient structural analysis.
Item Type:Essay (Master)
Faculty:ET: Engineering Technology
Subject:52 mechanical engineering
Programme:Mechanical Engineering MSc (60439)
Link to this item:http://purl.utwente.nl/essays/85309
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