Manual pages | Cast3M

$$$$ NEWMARK  NOTICE  CHAT      11/09/12    21:17:22     7124           
                                             DATE     11/09/12
                                             
  Procedure NEWMARK                        Voir aussi :
    -----------------   
    CHPO1 CHPO2 = NEWMARK  CHPO3 CHPO4 RIG1 RIG2 RIG3 CHPO5 CHPO6 FLOT1


    Description :
    ____________

    This procedure calculates a solution increment for a 
 step-by-step dynamic analysis by means of Newmark centered
 algorithm.


    Contents :
    __________

    CHPO3 : displacement field at the beginning of the
            step (CHPOINT type)

    CHPO4 : velocity field at the beginning of the step 
            (CHPOINT type)

    RIG1  : dynamic operator (RIGIDITE type)

    RIG2  : stiffness matrix (RIGIDITE type)

    RIG3  : mass matrix (RIGIDITE type)

    CHPO5 : force field at the beginning of the step
            (CHPOINT type)

    CHPO6 : force field at the end of the step
            (CHPOINT type)

    FLOT1 : time step (FLOTTANT type)

    CHPO1 : displacement field at the end of the step
            (CHPOINT type)

    CHPO2 : velocity field at the end of the step
            (CHPOINT type)

    Note :
    ________

    The arguments of the NEWMARK procedure must be input
 in the order specified in the syntax.

    The RIG1 RIGIDITE type object is expressed as follows :

            RIG1 = RIG2 + AMOR1*(2/FLOT1) + RIG3*(4/FLOT1/FLOT1)

 in which AMOR1 is the damping matrix.

   The velocities must be fields whose names of component are the
 same as those of the displacement fields.