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论文类型：期刊论文

发表时间：2017-11-01

发表刊物：EUROPEAN JOURNAL OF MECHANICS A-SOLIDS

收录刊物：Scopus、SCIE、EI

卷号：66

页面范围：212-231

ISSN号：0997-7538

关键字：Free vibration; Spatial beam; Isogeometric analysis; Multi-patch; Curvature and torsion

摘要：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.