Application of Damping Enhanced Component Mode Synthesis to the Finite Element Floating Frame of Reference Formulation

EasyChair Preprint 13431

Abstract

Realistic and efficient models of remote mainteance scenarios in fusion power tokamaks are important for simulation and control design. This is especially true when heavy, slender structures like the approximately 80 tonne, 12 meter long Breeding Blankets need to be remotely handled.  Distortion, deflection and vibration could potentialy occur in the blanket structure during the remote handling process. This flexible behavior needs to be avoided to prevent catastrophic system failure. One aspect that should be addressed during modelling is the inclusion of damping effects. In the sub-structuring literature, Component Mode Synthesis (CMS) methods like the Craig-Bampton transformation have been enhanced with damped (complex) modes to reduce errors during model reduction in dynamic systems with arbitrary, non-proportional, damping. With the goal of investigating effective modelling approaches for fusion remote mainteance scenarios, this work presents some findings when applying Damping Enhanced CMS to flexible multibody problems modelled using the Finite Element Floating Frame of Reference Formulation.

Keyphrases: Flexible multibody dynamics, Flexible structures, Floating frame of reference, component mode synthesis, model reduction

@booklet{EasyChair:13431,
  author    = {Aaronpal Gill and David Branson and Atanas Popov and Kaiqiang Zhang},
  title     = {Application of Damping Enhanced Component Mode Synthesis to the Finite Element Floating Frame of Reference Formulation},
  howpublished = {EasyChair Preprint 13431},
  year      = {EasyChair, 2024}}