Computational & Technology Resources
an online resource for computational,
engineering & technology publications |
|
Civil-Comp Proceedings
ISSN 1759-3433 CCP: 54
ADVANCES IN FINITE ELEMENT PROCEDURES AND TECHNIQUES Edited by: B.H.V. Topping
Paper III.1
Hierarchical Generation of Unstructured Meshes over Free-Form Polyhedra S. Maza+, F. Noel+, J.C. Leon+ and F. Sillion*
+Laboratory of Soils, Solids and Structures, Grenoble, France
S. Maza, F. Noel, J.C. Leon, F. Sillion, "Hierarchical Generation of Unstructured Meshes over Free-Form Polyhedra", in B.H.V. Topping, (Editor), "Advances in Finite Element Procedures and Techniques", Civil-Comp Press, Edinburgh, UK, pp 85-94, 1998. doi:10.4203/ccp.54.3.1
Abstract
For a few years, polyhedral models have been used to
model the geometry of an object in reverse engineering
applications and visualisation processes. The development
of methods to adapt accurate polyhedra requires
treatments in order to manipulate these models and to
adjust polyhedra for the purpose of its future uses. The
aim of this paper is to present a new approach devoted
to the generation of polyhedra based on an initial polyhedral
geometry. This method uses as input an arbitrary
polyhedron which is subdivided into several parts with
respect to its geometric features. The determination of
the main features of the object is carried out thanks to
a polyhedron simplification method which preserves the
geometry of the initial model. Then, a mapping between
the initial and the simplified polyhedra leads to the determination
of several partitions used in a parametrization
of the surface of the model. Afterwards, the simplification
method is used to generate a first polyhedron to initiate
the remeshing process. This method guarantees the conformity
of this representation.
Moreover, a significant number of applications are based on polyhedra, and require the generation and the adaption of a lot of models for their future uses. To this end, this new approach of remeshing is incorporated into a hierarchical data structure. purchase the full-text of this paper (price £20)
go to the previous paper |
|