Convergence acceleration using the residual shape technique when solving structure-acoustic coupling with the Patch Transfer Functions method
The forced response of the structure water-filled cavity system is investigated from the Patch Transfer Functions method. In such a case, a poor convergence of the PTF method is observed when using standard mode expansion to build the cavity-PTF. To improve its convergence and maintain the advantages of sub-structuring, residual shapes are introduced in the cavity-PTF computation, which is the new material of this article. This technique is successfully applied on numerical examples, highlighting the interest of such an approach, especially in heavy fluid. (C) 2010 Elsevier Ltd. All rights reserved.
ptf strong coupling fem residual modes