Open AccessModal analysis of industrial fluid structure systems with symmetric formulations in a finite element code
Author(s) -
JeanFrançois Sigrist
Publication year - 2007
Publication title -
european journal of computational mechanics
Language(s) - English
Resource type - Journals
eISSN - 2642-2085
pISSN - 2642-2050
DOI - 10.13052/remn.16.305-321
Subject(s) - finite element method , modal , coupling (piping) , code (set theory) , stiffness , modal analysis , structural engineering , direct stiffness method , fluid–structure interaction , mathematics , engineering , computer science , stiffness matrix , mechanical engineering , materials science , programming language , set (abstract data type) , polymer chemistry
The present paper deals with numerical developments performed in the finite element code ANSYS in order to implement coupled fluid structure formulations using symmetric matrices. The so-called (u, p, φ) formulation with mass and stiffness coupling is developed in the ANSYS code, enhancing the modeling possibilities of the existing fluid elements. Theoretical bases of the formulation are first exposed, test-cases and industrial application are then proposed. It is shown that computing times are decreased by 90% using a symmetric formulation instead of a non-symmetric one, allowing modal analysis of complex structures with fluid coupling for industrial purposes.