Manual pages | Cast3M

$$$$ KSIG     NOTICE  CHAT      11/09/12    21:16:48     7124           
                                             DATE     11/09/12

    Operateur KSIGMA                         Voir aussi : KTAN
    ----------------   
      RIG1 = KSIGMA  MODL1 SIG1 ( CAR1 ) ( 'FLAM' ) ;


    Description :
    ____________

    The KSIGMA operator calculates the geometric stiffness matrix
 associated with a stress field.

    Contents :
    __________


      MODL1  : model object (MMODEL type).

      SIG1   : stress field (MCHAML type, CONTRAINTES subtype)

      CAR1   : field of geometrical properties (for some
               elements: thick shells, DST, beams, pipes)
               (MCHAML type, CARACTERISTIQUES subtype)

     'FLAM'  : key word required when the user wishes to use the
               matrix for performing a buckling analysis

      RIG1   : generated object (RIGIDITE type, RIGIDITE subtype)



    Note 1 :
    ________

     CAR1 must contain the direction cosines of orthotropic axes
 with respect to the local axes, for an orthotropic DST
 element; this implies the use of the MATR operator for creating CAR1 .

    
    Note 2 :
    _________

    The harmonic number in case of a Fourier's series analysis is
 defined by the OPTION instruction.