Importance

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Abstract

Techniques of joining imperfectly-matching NURBS patches to form a computerized model suitable for FEA are disclosed. Definitions of first and second patches are received for joining together along a physical boundary defined in first and second curves that are imperfectly-matching. Both curves' knot-vectors are normalized such that the parametric length equals the physical length, respectively. The curve having less number of control points is designated as master curve, the other as slave curve. If the curves are partially overlapped the first and second curves are adjusted such that first and second projection points correspond to starting and end locations of the common curve, respectively A set of linear constraint equations for numerically connecting the patches along the physical boundary by computing dependencies of the slave curve's control points to the master curve's control points. The patches together with the constraint equations enable a computerized model created therefrom suitable for FEA.

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First Claim