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Keywords:

  • coupled problems;
  • fluid–structure interaction;
  • time integration;
  • generalized-α method;
  • stability

Abstract

This work investigates the effect of employing different time integration schemes in the sub-domains of a coupled problem, such as fluid–structure interaction. On the basis of a one-dimensional model problem and the two versions of the generalized-α method developed for first- and second-order systems, it is shown that the overall problem is likely to be less stable and less accurate than the individual sub-problems unless special measures are taken. The benchmark problem of the oscillating flexible beam is used to demonstrate that these findings also apply to full computational fluid–structure interaction. Copyright © 2010 John Wiley & Sons, Ltd.