Isogeometric analysis based on geometric reconstruction models

Abstract In isogeometric analysis (IGA), the boundary representation of computer-aided design (CAD) and tensor-product non-uniform rational B-spline structure make three-dimensional (3D) problems with irregular geometries difficult. this paper, an IGA method for complex models is presented by reconstructing analysis-suitable models. The CAD model represented polygons or point cloud embedded into a regular background grid, reconstruction proposed to obtain level set function approximate model, which can be directly used in IGA. Three 3D examples are test method, results demonstrate that deal engineering parts reconstructed clouds.