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Type: Artigo de evento
Title: Parallel Implementation Of A Preconditioner Based On Sub-structuring
Author: Devloo P.R.B.
Menezes F.A.M.
Dias Dos Santos T.
Shauer N.
Abstract: This work documents two contributions to the parallel resolution of large systems of equations resulting from finite element simulations. 1) The balanced domain preconditioner as proposed by C. Dohrman was reinterpreted as a preconditioner applied to the condensed system of equations. By rewriting the technique in such a matter it can be implemented reducing a cycle of local global communication and reduces the need to communicate the residual and solution vector to interface nodes only 2) An object oriented interface is implemented which greatly simplifies the use of the substructuring technique. Through the interface, the user chooses the number of substructures, the number of threads used during the element assembly process, the number of threads to invert the subdomain stiffness matrices and the number of threads to multiply the substructured stiffness matrix with a vector. The technique was applied to the tree dimensional model of an eight story building and run on a desktop computer with eight cores. The efficiency was evaluated in function of the number of threads and number of subdomains which define the substructures. 3) Results show that the reduced number of interface nodes does not necessarily reduce the global computation time. © Civil-Comp Press, 2011.
Rights: fechado
Identifier DOI: 
Date Issue: 2011
Appears in Collections:Unicamp - Artigos e Outros Documentos

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