An adaptive isogeometric analysis collocation method with a recovery-based error estimator. (English) Zbl 1440.65248
Summary: In this paper, we propose an enhanced isogeometric analysis (IGA) collocation method. It is well known that the location of the collocation points plays an important role in the accuracy and stability of IGA collocation methods. This is particularly true for non-uniform meshes and domains generated from multi-patch geometries. We present an enhanced collocation method based on Gauss points, which has improved accuracy as compared to using \(C^1\) splines and a recovery-based error estimator that can be derived by sampling the solution at particular points in the domain. Adaptivity is implemented using a hierarchical spline basis, which satisfies the \(C^1\) continuity requirement. The proposed approach has been tested by several benchmark problems, including multipatch domains and geometries with re-entrant corners.
MSC:
| 65N35 | Spectral, collocation and related methods for boundary value problems involving PDEs |
| 65D07 | Numerical computation using splines |
Keywords:
IGA collocation method; Gaussian-collocation points; PHT-spline; linear elasticity; error estimationSoftware:
FEAPReferences:
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