$$$$ SURF NOTICE CHAT 11/09/12 21:18:13 7124 DATE 11/09/12 Operateur SURFACE Voir aussi : ----------------- SURF1 = SURFACE (CHPO1) | LIG1 | 'PLANE' (CRIT) ; | | 'SPHERIQUE' CENTR1 ; | | 'CYLINDRIQUE' AXEI1 AXEJ1 ; | | 'CONIQUE' SOMM1 AXEJ1 ; | | 'TORIQUE' CENTR1 AXEJ1 CENTR2 ; | | | 'POLYNOME' N1 N2 P1 P2 (P3 (P4 ... ) ) | P11 P12 (P13 (P14 ... ) ) | (P21 (P22 (P23 (P24 ... ) ) | ( ... ) | ('PARAMETRE' U1 U2 V1 V2) ('REGULIER') ; Description : _____________ The SURFACE operator constructs the mesh which is located within the contour defined by the LIG1 object (which must be a set of closed lines). In addition, the POLYNOME option enables the construction of a parametered surface. Contents : __________ It is possible to enter a CHPOINT (CHPO1) of mesh size (one component per node) to be respected. LIG1 may be composed of external and internal contours (delimiting holes) which must turn into opposite directions. The mesh can be carried out by means of triangular, or quadrangular elements depending on what is requested in the OPTION instruction. The surface can be PLANE, SPHERIQUE, CYLINDRIQUE, CONIQUE or TORIQUE (according to the key word). 'PLAN' : optionally : 'CRIT' : planeity criterium. cosinus of angle between nodes of the line and plane perpendicular. 'SPHERIQUE' : key word followed by : CENTR1 : sphere centre (POINT type) 'CYLINDRIQUE' : key word followed by : AXEI1, AXEJ1 : two points of the cylinder axis (POINT type) 'CONIQUE' : key word followed by : SOMM1, AXEI1 : cone apex and a point of the axis (POINT type) 'TORIQUE' : key word followed by : CENTR1 : torus centre (POINT type) AXEI1 : a point of the symmetry axis (POINT type) CENTR1 : centre of the small circle (POINT type) Note : _______ For a conical surface, the contour must not pass through the cone apex. --------------------- | POLYNOME option | --------------------- The result is the MAILLAGE of the parametered surface of equation : | P1 P2 P3 P4 .. | | 1 | 2 (N2-1) | P11 P12 P13 P14 .. | | U | P(U,V) = (1 V V ...V ) x | P21 P22 P23 P24 .. | x | .. | | ... | |U**(N1-1)| N1 , N2, : respectively, number of columns and lines of the matrix of points (ENTIER type) P1, P11, ... , : POINT type objects. The abscissae of these points give the parametrical representation of the surface points abscissae, etc... U1, U2 : U parameter variation boundaries (FLOTTANT type) (equalling (0,1) by default) V1, V2 : V parameter variation boundaries (FLOTTANT type) (equalling (0,1) by default) 'REGULIER' : key word (MOT type) indicating that the surface points must be equally set apart in the geometrical space (considering the existing densities) rather than in the parametrical space
© Cast3M 2003 - All rights reserved.
Disclaimer