Release Time:2019-03-11  Hits:

Indexed by: Journal Article

Date of Publication: 2017-11-01

Journal: EUROPEAN JOURNAL OF MECHANICS A-SOLIDS

Included Journals: EI、SCIE、Scopus

Volume: 66

Page Number: 212-231

ISSN: 0997-7538

Key Words: Free vibration; Spatial beam; Isogeometric analysis; Multi-patch; Curvature and torsion

Abstract: Efficient isogeometric curved beam element is formulated to investigate the free vibration behavior of spatial beam structures with arbitrary curvature and torsion. Beam structures are described by multi patch non-uniform rational B-splines. Isogeometric formulation with Timoshenko beam theory is applied with global formulation. Compared with prior formulations that use local formulation within a single patch, the present global formulation of stiffness and mass matrices for multi patch structures is effective in dealing with complex structures. Numerical tests are carried out on a series of models including a conceptual framework of an automobile to show the effectiveness of the present method. (C) 2017 Elsevier Masson SAS. All rights reserved.