Manual pages | Cast3M

$$$$ @OTCOQUE NOTICE  CHAT      11/09/12    21:17:29     7124           
                                             DATE     11/09/12
                                             
  Procedure @OTCOQUE                         Voir aussi :
    ------------------   
   LREEL1 DEP1 = @OTCOQUE FLOT1 ENTI1 FLOT2 FLOT3 FLOT4
                          TAB1  TAB2
                          FORC1 RIG1 P1;
                          

    Description :
    _____________

    This procedure used in interactive mode enables the user to
 optimize the layers of a shell or plate structure according
 to the FULL-STRESS-DESIGN method.


    Contents :
    __________

    LREEL1 :  list containing the region layers 
              (LISTREEL type)

    DEP1   :  displacement field of the optimized structure
              (CHPOINT type)

    FLOT1  :  convergence criterion for equivalent sigma
              (FLOTTANT type)

    ENTI1  :  maximum number of iterations (ENTIER type)

    FLOT2  :  structure initial thickness, same value for all the
              regions (FLOTTANT type)

    FLOT3  :  optimum value for equivalent sigma, calculated
              in relation with the VMIS operator (FLOTTANT type)

    FLOT4  :  minimum acceptable thickness (FLOTTANT type)

    TAB1   :  table containing the relative object for the i-th
              region MMODL (TABLE type),TAB1.I (MMOD type),
              I (ENTIER type)

    TAB2   :  table containing the relative object with the material
              characteristics for the i-th region (TABLE type),
              TAB2.I (MCHAML type), I (ENTIER type),

    FORC1  :  force field (CHPOINT type)

    RIG1   :  stiffness associated with the linkages or the part of
              the structure which is not subjected to an optimization

    P1     :  viewpoint for the plots


    Note :
    ______

    -  Mathematically speaking, this method offers an optimum
  solution for isostatic structures.
    - The structure must be divided in regions in which the 
 thickness is considered to be uniform.
     - The convergence can be controlled by a parameter which is
 called on, in interactive mode, at each iteration; it aims at
 reducing or amplifying the variation of the layers evaluated at 
 each iteration on the basis of the ratio between the region  
 maximum equivalent sigma and the optimum equivalent sigma.