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�������պ����ѧѧ�� 2001, Vol. 27 Issue (2) :209-212    DOI:
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Algorithm for Mixed Meshing Multiple Trimmed ParametricSurfaces for Finite Element Analysis
OUYANG Xing, SHI Fa-zhong*
Beijing University of Aeronautics and Astronautics, School of Mechanical Engineering and Automation

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ժҪ ���ݳ�ѹģ����״�ص�,����CAD/CAMϵͳ�����ij�ѹģ�ߵĶ�ü�����������ѧģ��,�����һ�ַ��ϳ�ѹ��������Ԫ������Ҫ�������κ��ı��λ�������ʷ��㷨.��������ɢ���Ʋ�������ߡ���̱ߡ��������ͽǶ����,����ü�����������ɢΪ����μ�.�����������߲��Ҳü������������ڹ�ϵ,����B-Rep��ʾ�����漸��ģ��,�����¶���μ�.Ȼ���ɶ���μ��õ������κ��ı��λ������,�������Ԫ�����ݵ�,�����ڲü���������߽紦���ѷ�͸���.
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Abstract�� According to the character of die shape, based on the mathematical model of multiple trimmed parametric surfaces, which is created by CAD/CAM system, an algorithm for generate mixed mesh of triangles and quadrilaterals for finite element analysis is presented. The trimmed parametric surfaces are discreted into polygons, which are controlled by the parameters of maximum edge length, minimum edge length, distance tolerance and angle tolerance, etc. The adjacent relation between surfaces is found and merged by surface-curves, consequently, a model represented by boundary is created, the polygons are updated by surface-curves, and mixed mesh is generated by these polygons. The resultant mesh is conformal, without crack and overlap between the adjacent surfaces.
Keywords�� dies   stamping   finite elements   trimmed parametric surface   mesh     
Received 1999-12-02;
Fund:

����"������"�ƻ�CIMS���ⵥԪĿ���Ʒ������Ŀ(863-511-820-020)

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ŷ����, ʩ����.����ü��������������Ԫ��������ʷַ�[J]  �������պ����ѧѧ��, 2001,V27(2): 209-212
OUYANG Xing, SHI Fa-zhong.Algorithm for Mixed Meshing Multiple Trimmed ParametricSurfaces for Finite Element Analysis[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2001,V27(2): 209-212
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http://bhxb.buaa.edu.cn//CN/     ��     http://bhxb.buaa.edu.cn//CN/Y2001/V27/I2/209
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