Application of rigid links in structural design models = Primenenie žestkih vstavok v rasčetnyh modelâh konstrukcij / Sergey Yu. Fialko // International Journal for Computational Civil and Structural ... więcej

Application of rigid links in structural design models = Primenenie žestkih vstavok v rasčetnyh modelâh konstrukcij / Sergey Yu. Fialko // International Journal for Computational Civil and Structural Engineering [Dokument elektroniczny]. – 2017, T. 13, No. 3, s. 119-137 : rys., schem., tab. – Tryb dostępu: http://ijccse.iasv.ru/IJCCSE/article/view/57/26. – Bibliogr. 15 poz., Abstr., Annot. – doi: 10.22337/1524-5845-2017-13-3-119-137. – ISSN 2587-9618

A special finite element modelling rigid links is proposed for the linear static and buckling analysis. Unlike the classical approach based on the theorems of rigid body kinematics, the proposed approach ... więcej

A special finite element modelling rigid links is proposed for the linear static and buckling analysis. Unlike the classical approach based on the theorems of rigid body kinematics, the proposed approach preserves the similarity between the adjacency graph for a sparse matrix and the adjacency graph for nodes of the finite element model, which allows applying sparse direct solvers more effectively. Besides, the proposed approach allows significantly reducing the number of nonzero entries in the factored stiffness matrix in comparison with the classical one, which greatly reduces the duration of the solution. For buckling problems of structures containing rigid bodies, this approach gives correct results. Several examples demonstrate its efficiency.