Coupling of non-conforming NURBS patches with the weak substitution method

摘要: Isogeometric analysis unifies the data model for description of geometry design and analysis. The is altered towards compatibility with used in work flow. basis functions descriptions are to approximate all unknown quantities numerical simulation. most common industry NURBS surfaces. properties surfaces do not allow local refinement. Geometrical models industrial applications generally consist several patches, which usually neither have conforming knot vectors nor same degree. Thus, control points coincide a connection by shared possible. Special methods avoid mutual refinement necessary. This works presents new method coupling non-conforming patches. A relation between deformations having influence on edges established. allows expressing set slave as function appropriate master points. points, well associated degrees freedom can be removed from global system equation. also nonlinear computations without additional effort. derivation proposed shown. Numerical examples show high accuracy presented method. (© 2014 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim)