An enriched formulation of isogeometric analysis applied to the dynamical response of bars and trusses. Issue 7 (16th March 2020)

• Record Type: Journal Article
• Authors: Rauen, Mateus; Machado, Roberto Dalledone; Arndt, Marcos
• Is Part Of: Engineering computations. Volume 37:Issue 7(2020)
• Page Start: 2439
• Page End: 2466
• Publication Date: 2020-03-16
• Subjects: Isogeometric analysis -- Bars -- Enriched methods -- Structural dynamics -- Trusses; Computer-aided engineering -- Periodicals; Computer graphics -- Periodicals; 620.00285
• DOI: 10.1108/EC-04-2019-0189
• Languages: English
• ISSNs: 0264-4401

Abstract

Abstract : Purpose: This study aims to present a new hybrid formulation based on non-uniform rational b-splines functions and enrichment strategies applied to free and forced vibration of straight bars and trusses. Design/methodology/approach: Based on the idea of enrichment from generalized finite element method (GFEM)/extended finite element method (XFEM), an extended isogeometric formulation (partition of unity isogeometric analysis [PUIGA]) is conceived. By numerical examples the methods are tested and compared with isogeometric analysis, finite element method and GFEM in terms of convergence, error spectrum, conditioning and adaptivity capacity. Findings: The results show a high convergence rate and accuracy for PUIGA and the advantage of input enrichment functions and material parameters on parametric space. Originality/value: The enrichment strategies demonstrated considerable improvements in numerical solutions. The applications of computer-aided design mapped enrichments applied to structural dynamics are not known in the literature.