Manual pages | Cast3M

$$$$ MASS     NOTICE  CHAT      11/09/12    21:17:10     7124           
                                             DATE     11/09/12
                                             
    Operateur MASSE                          Voir aussi : MATE CARA
    ---------------                                       LUMP  MDIA   

    Description :
    ___________

    The purpose of the MASSE operator is to calculate the mass
    matrices in different cases.


    -------------------
    | Finite elements |
    -------------------

      MASS1 =  MASSE  MODL1  MAT1 ;

      Contents :
      _________


      MODL1  : model object (MMODEL type)

      MAT1   : field of material and geometrical properties 
               (MCHAML type, CARACTERISTIQUES subtype)

      MASS1  : RIGIDITE type result of MASSE subtype


      Note :
      _______

      The geometrical support of MASS1 will be that of MAT1.

      The OPTION instruction specifies the harmonic number used
      for a Fourier's series analysis :

                    OPTION MODE FOUR NN ;

      CAR1 features are required only when the element geometrical 
      description is not possible through the mesh, for instance,  
      the thickness of plate elements, or the bar sections, etc... 
      Their geometrical support must be included in that of MAT1.
      Whenever you mention CAR1, you must mention it after MAT1.


    -----------------------
    | ADDITIONAL MASSES   |
    -----------------------

      MASS1 = MASSE   |( 'DEPL' ) ( 'ROTA' )|  FLOT1  GEO1 ;
                      |       MOTi ...      |

      MASS2 = MASSE BAS1 ;
      MASS3 = MASSE SOL1 ;
      MASS4 = MASSE SOL2 STRU1 ;
      MASS5 = MASSE SOL1 SOL2 STRU1 ;
      MASS6 = MASSE TAB1 ;

      MASS7 = MASSE TAB2 (TAB3) RIG1 ;
      Contents :
      __________

      MASS2 : set of mass matrices (RIGIDITE type, MASSE subtype)
              pertaining to the BAS1 modal base

      BAS1  : supporting modal base (BASEMODA type)

      MASS3 : mass due to the modes (generalized masses) 
              (RIGIDITE type, MASSE subtype)

      MASS4 : mass due to the coupling of the static solutions on a 
              structure (RIGIDITE type, MASSE subtype)

      MASS5 : mass due to the coupling of the static solutions and   
              the modes in the structure (RIGIDITE type, MASSE subtype)
               

      SOL1  : structure modes (SOLUTION type, MODE subtype)

      SOL2  : static solutions (SOLUTION type, SOLUSTAT subtype)

      STRU1 : elementary structure (STRUCTUR type)

      MASS6 : mass due to the modes (generalized masses) (RIGIDITE 
              type, MASSE subtype) contained in the TAB1 object (TABLE 
              type, 'BASE_DE_MODES' subtype).

       MASS7 : type RIGIDITE, subtype MASSE, mass matrix computed in
the basis of displacements enclosed in TAB2 (type TABLE) either of 
subtype 'BASE_MODALE' or subtype 'LIAISONS_STATIQUES'. When TAB3 is
given so that both subtypes are present, cross terms are also computed.

      RIG1 : type RIGIDITE, subtype MASSE, mass matrix computed in the
initial basis

    Note :
    ________

    The geometrical supports of MASS2, MASS3, MASS4, MASS5 contain
    the points associated with the modes or the linkages defined 
    between the structures. The 'ALFA' component is associated 
    with the mode, 'BETA' with a linkage on free points, 'FBET' with a
    linkage on restrained nodes of MODE subtype.
    
    The geometrical support of MASS7 is composed of the points
associated with the static or eigen modes displacements. The
components 'BETA', dual 'FBET' refer to the first ones, 'ALFA', dual
'FALF' to the second ones.