Manual pages | Cast3M

$$$$ SISSIB   NOTICE  CHAT      11/09/12    21:18:07     7124           
                                             DATE     11/09/12

  Procedure SISSIB                         Voir aussi :
    ----------------   
    TAB2 = SISSIB TAB1 ;



    Description :
    _____________

    The SISSIB procedure calculates the seismic response of a
 structure by means of a spectrum analysis.


    Contents :
    __________

    TAB1  : TABLE type object of DONNEE subtype containing the
            following data :

    TAB1.'STRUCTURE'    : TAB2 (TABLE type) of BASE_MODALE subtype
                          containing at the MODES index, the structure  
                          eigen modes and at the 'PSEUDO_MODES' index  
                          (optional) the pseudo modes associated with
                          a seismic excitation
  
    TAB1.'AMORTISSEMENT': LREE1 (LISTREEL type) containing the
                          modal dampings of the structure modes

    TAB1.'EXCITATION'   : TAB3 (TABLE type) of 'EXCITATION' subtype
                          indexed by an integer I1 varying from 1 to 
                          the number of directions of excitation to be
                          taken into account in the calculation (<EG 3)

    TAB3.I1             : TABLE type object such as :
      TAB3.I1.'DIRECTION'             : MO1 (MOT type) value 'X', 'Y',
                                        or 'Z' describing the direction
                                        of the excitation
      TAB3.I1.'SPECTRE'               : EVO1 (EVOLUTION type) containing
                                        the spectrum (spectra) in pseudo
                                        acceleration of the seismic
                                        motion
      TAB3.I1.'AMORTISSEMENT'         : LREE2 (LISTREEL type) containing
                                        the spectra dampings
      TAB3.I1.'ACCELERATION_MAXIMALE' : FLOT1 (FLOTTANT type) (optional)
                                        seismic maximum acceleration

    TAB1.'RECOMBINAISON_MODES'    : MO2 (MOT type) type of modal
                                    recombination to be chosen from :
          SRSS                    : simple quadratic combination
          ROSENBLUETH             : whole quadratic combination
                                    ROSENBLUETH formula
          CQC                     : whole quadratic combination
                                    DER KIUREGHIAN formula
          DIX_POUR_CENT           : combination 10% rule

    TAB1.'DUREE'                     : FLOT2 (FLOTTANT type), duration
                                       of the seism strong part.
                                       Required only with ROSENBLUETH
                                       formula.

    TAB1.'RECOMBINAISON_DIRECTIONS'  : MO3 (MOT type) recombination
                                       rule for the seismic directions
                                       (for the time being, there is
                                       only one possibility :
                                       'QUADRATIQUE').

    TAB1.'SORTIES'       : TAB4 (TABLE type) of 'SORTIES' subtype
                           containing :
          TAB4.'DOMAINE'         : MAILLAGE or MMODEL type object
                                   referring to the geometrical domain
                                   on which outputs are requested
                                   (a MMODEL type object must be
                                   supplied when outputs relative to 
                                   the stresses are requested)
          TAB4.'DEPLACEMENTS'    : LOGIQUE type object (VRAI OU FAUX)
                                   indicating that we wish take the
                                   displacements out.
          TAB4.'ACCELERATIONS'   : LOGIQUE type object (VRAI OU FAUX)
                                   indicating that we wish take the
                                   accelerations out.
          TAB4.'CONTRAINTES'     : LOGIQUE type object (VRAI OU FAUX)
                                   indicating that we wish take the
                                   stresses out.
          TAB4.'REACTIONS'       : LOGIQUE type object (VRAI OU FAUX)
                                   indicating that we wish take the
                                   reactions out.

    TAB1.'IMPRESSION'    : LOGIQUE type object indicating that an
                           automatic printing of the results is
                           requested
                           (optional : FAUX (false), by default)

    TAB1.'TRONCATURE'    : LOGIQUE type object indicating that we wish
                           to take into account the truncation effect 
                           of the modal basis by means of the pseudo
                           modes
                           (optional : FAUX (false), by default)

    TAB1.'REPRISE'       : TABLE type object (optional) generated during
                           a previous call on SISSIB for the same
                           structure, containing the values of the
                           spectra for each of the modes, as well as the
                           correlation coefficients between the modes
                           which, in that case, are not calculated again

    TAB2                 : TABLE type object containing the results of
                           the calculation :

    TAB2.'REPRISE'         TABLE type object that the user may supply
                           as a datum for SISSIB for a later
                           calculation on the same structure (see
                           TAB1.'REPRISE')

    TAB2.MO4.MO5                : CHPOINT or MCHAML type object
                                  containing the outputs MO5 (MOT type
                                  object, with the value DEPLACEMENTS,
                                  ACCELERATIONS, CONTRAINTES or
                                  REACTIONS) for the direction of
                                  excitation MO4 (MOT type object, with
                                  the value X, Y or Z )

    TAB2.'REPONSE_TOTALE'.MO6   : CHPOINT or MCHAML type object
                                  containing the outputs MO6
                                  (MOT type object, with the value
                                  DEPLACEMENTS, ACCELERATIONS,
                                  CONTRAINTES ou REACTIONS) combined
                                  for all the directions of excitation.




    
    Note 1 :
    _________

    When, in a calculation, outputs are requested in stress, reaction,
 or when it is required that truncation effects of the modal basis be
 taken into account by means of the pseudo modes, the modal basis
 (TAB1.'STRUCTURE') must be completed with the corresponding magnitudes
 (using the SIGS, REAC and PSMO operators).


    Note 2 :
    _________

    The outputs in displacement (DEPLACEMENTS option) include
all the degrees of freedom of the system (Displacements,rotations,
pressure...).