کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
498323 862987 2012 19 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Isogeometric analysis of trimmed NURBS geometries
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر نرم افزارهای علوم کامپیوتر
پیش نمایش صفحه اول مقاله
Isogeometric analysis of trimmed NURBS geometries
چکیده انگلیسی

A methodology is presented which enables isogeometric analysis on trimmed NURBS surfaces. The general limitations of NURBS-based isogeometric analysis are roughly delineated to resolve the associated issues. A local reconstruction technique using a geometric basis is developed and applied to evaluate the finite element constituents of the trimmed knot spans in terms of the underlying control variables. This paper covers the algorithmic treatment of single patches as well as of multi-patches. Moreover, the proposed methodology gives rise to a new feature in the case of load application, what we refer to as Isogeometric Load Design. It provides the possibility to apply an arbitrarily shaped loading area onto a patch. Consequently, the restriction of the alignment of the loading with the underlying parameterization is canceled. In several significant examples the capabilities and effectiveness of this new method are demonstrated and confirm that the proposed method produces compelling results.


► This paper constitutes a further step towards the integration of CAD and CAE.
► A reconstruction technique is formulated to enable isogeometric analysis on trimmed NURBS surfaces.
► A new feature, called isogeometric load design, is developed.
► A formulation is presented to couple trimmed multi-patches.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computer Methods in Applied Mechanics and Engineering - Volumes 241–244, 1 October 2012, Pages 93–111
نویسندگان
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