Manual pages | Cast3M

$$$$ RESPOWNS NOTICE  CHAT      11/09/12    21:17:58     7124           
                                             DATE     11/09/12

    Procedure RESPOWNS                       Voir aussi : PRNS
    ------------------   

    EVOL1_PS = RESPOWNS EVOL2_RS EVOL3_M LREEL1_F (TAB1);


    Description :
    _____________

    Calculation of the power spectrum EVOL1_PS (including one curve)
    of a "virtual" stationary signal of period TE associated with
    a spectrum of response EVOL2_RS (including one curve) corresponding
    to a damping AMOR, and to N modulation curves EVOL3_M (including
    N curves) at the frequency wavebands specified in LREEL1_F.
    The waveband of the i-th function EVOL3_M is given by the
    i-th (lower frequency) and the i+1-th (upper frequency)
    element of OM.
    
    The modulation functions must all start at the same time step TI
    and end at the same time step TF. The signal duration TE is
    given by TF-TI. The cut frequency of EVOL1_PS is given by
    the maximum value of LREEL1_F.
    
    In order to stabilize the convergence process, the iterations 
    will be performed using Hanning filter (HANN operator).
   
    A specific option enables an identification compatible with a
    wavelet calculation.

    Options :
    _________

    The options are included in TAB1.

    index  pointed object    comments
               type


     GPRP   MOT           stands for the physical magnitude of the
                          response :
                          'ACCE'(leration), 'VITE'(sse) (velocity) or
                          'DEPL'(acement relatif) (relative
                          displacement). The default is 'ACCE'.

     GPAB   MOT           stands for the physical magnitude in the 
                          response abscissa : 'PERI'(od) or 
                          'FREQ'(uency).
                          The default is 'PERI'.

     AMOR   FLOTTANT      specifies the AMOR damping. The default is
                          0.05.

     FFPS   LISTREEL      gives the calculation reticle in frequency
                          of the power spectrum. The default is
                          a geometrical progression ranging between
                          1/TE and the cut frequency whose ratio is
                          (1+2*KSI), or KSI=MIN AMOR.

     TTRS   LISTREEL      gives the calculation reticle in period
                          of the power spectrum. The default is that
                          of the PSRS operator.

     JMAX   ENTIER        stands for the maximum number of iterations 
                          permitted . The default is 15.

     JHAN   ENTIER        stands for the number of iterations including
                          Hanning filtering. The default is JMAX.

     EMAX   REEL          stands for the error convergence limit.
                          The default is 1.E-2.

     NBPR   ENTIER        indicates the number of stationary
                          processes associated with the calculation
                          of the spectrum of response. 
                          The default is that of the PRNS operator.

     NBIN   ENTIER        indicates the number of time integration
                          points associated with each stationary
                          process. The default is that of the PRNS
                          operator.
                          
     LIST   LOGIQUE       indicates the possibility of displaying the
                          convergence process. The default is FAUX (false).

     ONDE   FLOTTANT      specifies t the sampling period associated
                          with the first modulation function.
                          This parameter implies a wavelet calculation:
                          in this case EVOL1_PS contains as many points
                          as there are wavebands and EVOL3_M contains
                          the modelization of wavelet coefficients :
                          the first curve corresponds to the residue,
                          and the next curves are connected with each
                          level of decomposition (from low to high
                          frequencies).