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Flexible multibody dynamics of an Afterburner-type fairground attraction

Vermeulen, J.J. (2019) Flexible multibody dynamics of an Afterburner-type fairground attraction.

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Abstract:In this paper, a method to analyze flexible multibody systems is presented, based on the floating frame formulation and applied to the Afterburner. In this formulation a floating frame is fixed to the rigid body center of mass. The rigid body motions, which make the system highly nonlinear, are described by constraint equations in a global frame. While the flexible deformations are described in the local floating frame by a linear combination of mode shapes multiplied with flexible coordinates. Linear finite element models are made and reduced to the interface points using the Craig-Bampton method, resulting in a small amount of mode shapes. At the interface points are revolute joints positioned, which include large three-dimensional rotations. To overcome singularity problems a solution procedure is described using an update of the rotation matrices. The results of this model are validated using simulations.
Item Type:Essay (Master)
Faculty:ET: Engineering Technology
Subject:50 technical science in general, 52 mechanical engineering
Programme:Mechanical Engineering MSc (60439)
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