University of Twente Student Theses


Analysis of Dynamic Loads induced by Spinning Gondolas on a Roller Coaster

Hoorn, H.E. van den (2019) Analysis of Dynamic Loads induced by Spinning Gondolas on a Roller Coaster.

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Abstract:A spinning rollercoaster is characterized by a gondola that pivots freely under the effects of track dynamics and passenger weight distribution. A realistic kinematic model of the spinning rollercoaster is created, from which the forces and moments acting on the main chassis beam can be extracted. The loads induced on the main chassis beam are converted into loadcases for a subsequent finite element analysis by two different methods. The forces and moments of the conventional method are represented by relatively conservative loadcases that are more severe than the actual loads. On the other hand, the optimized method is characterized by envelopes whose boundaries coincide with the actual boundaries of the load data. The maximum stress and displacement values predicted by the optimized method are nearly ten percent lower than the results obtained with the conventional method. A comparison with the results of a full transient analysis shows that the optimized method is able to accurately predict the maximum stress and deformation levels. The mode-superposition technique is proposed if a preliminary stress analysis for each load in a load cycle is required, thanks to an eighty percent reduction in computational time with a minor loss of accuracy.
Item Type:Essay (Master)
Van Velzen Extern Engineering, Apeldoorn, Netherlands
Faculty:ET: Engineering Technology
Subject:52 mechanical engineering
Programme:Mechanical Engineering MSc (60439)
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