rini46.F

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!||====================================================================
!||    rini46      ../starter/source/elements/spring/rini46.F
!||--- called by ------------------------------------------------------
!||    rinit3      ../starter/source/elements/spring/rinit3.F
!||--- calls      -----------------------------------------------------
!||    get_u_geo   ../starter/source/user_interface/uaccess.F
!||    get_u_mat   ../starter/source/user_interface/uaccess.F
!||    get_u_mid   ../starter/source/user_interface/uaccess.F
!||    get_u_mnu   ../starter/source/user_interface/uaccess.F
!||    get_u_pid   ../starter/source/user_interface/uaccess.F
!||    get_u_pnu   ../starter/source/user_interface/uaccess.F
!||====================================================================
      SUBROUTINE rini46(NEL   ,IOUT   ,IPROP ,
     3                  IX    ,XL     ,MASS  ,XINER  ,STIFM ,
     4                  STIFR ,VISCM  ,VISCR ,UVAR   ,NUVAR )
C-------------------------------------------------------------------------
C     This subroutine initialize springs using user properties.
C-------------------------------------------------------------------------
C----------+---------+---+---+--------------------------------------------
C VAR      | SIZE    |TYP| RW| DEFINITION
C----------+---------+---+---+--------------------------------------------
C IOUT     |  1      | I | R | OUTPUT FILE UNIT (L00 file)
C IPROP    |  1      | I | R | PROPERTY NUMBER
C----------+---------+---+---+--------------------------------------------
C IX       | 3*NEL   | I | R | SPRING CONNECTIVITY
C                            | IX(1,I) NODE 1 ID
C                            | IX(2,I) NODE 2 ID
C                            | IX(3,I) OPTIONAL NODE 3 ID
C                            | IX(4,I) SPRING ID
C XL       |   NEL   | F | R | ELEMENT LENGTH
C----------+---------+---+---+--------------------------------------------
C MASS     |   NEL   | F | W | ELEMENT MASS
C XINER    |   NEL   | F | W | ELEMENT INERTIA (SPHERICAL)
C STIFM    |   NEL   | F | W | ELEMENT STIFNESS (TIME STEP)
C STIFR    |   NEL   | F | W | ELEMENT ROTATION STIFNESS (TIME STEP)
C VISCM    |   NEL   | F | W | ELEMENT VISCOSITY (TIME STEP)
C VISCR    |   NEL   | F | W | ELEMENT ROTATION VISCOSITY (TIME STEP)
C----------+---------+---+---+--------------------------------------------
C UVAR     |NUVAR*NEL| F | W | USER ELEMENT VARIABLES
C NUVAR    |  1      | I | R | NUMBER OF USER ELEMENT VARIABLES
C----------+---------+---+---+--------------------------------------------
C-------------------------------------------------------------------------
C FUNCTION 
C-------------------------------------------------------------------------
C INTEGER II = GET_U_PNU(I,IP,KK)
C         IFUNCI = GET_U_PNU(I,IP,KFUNC)
C         IPROPI = GET_U_PNU(I,IP,KPROP)
C         IMATI = GET_U_PNU(I,IP,KMAT)
C         I     :     VARIABLE INDEX(1 for first variable,...)
C         IP    :     PROPERTY NUMBER
C         KK    :     PARAMETER KFUNC,KMAT,KPROP
C         THIS FUNCTION RETURN THE USER STORED FUNCTION(IF KK=KFUNC), 
C         MATERIAL(IF KK=KMAT) OR PROPERTY(IF KK=KPROP) NUMBERS. 
C         SEE LECG29 FOR CORRESPONDING ID STORAGE.
C-------------------------------------------------------------------------
C INTEGER IFUNCI = GET_U_MNU(I,IM,KFUNC)
C         I     :     VARIABLE INDEX(1 for first function)
C         IM    :     MATERIAL NUMBER
C         KFUNC :     ONLY FUNCTION ARE YET AVAILABLE.
C         THIS FUNCTION RETURN THE USER STORED FUNCTION NUMBERS(function 
C         referred by users materials).
C         SEE LECM29 FOR CORRESPONDING ID STORAGE.
C-------------------------------------------------------------------------
C my_real PARAMI = GET_U_GEO(I,IP)
C         I     :     PARAMETER INDEX(1 for first parameter,...)
C         IP    :     PROPERTY NUMBER
C         THIS FUNCTION RETURN THE USER GEOMETRY PARAMETERS 
C-------------------------------------------------------------------------
C my_real PARAMI = GET_U_MAT(I,IM)
C         I     :     PARAMETER INDEX(1 for first parameter,...)
C         IM    :     MATERIAL NUMBER
C         THIS FUNCTION RETURN THE USER MATERIAL PARAMETERS 
C         NOTE: GET_U_MAT(0,IMAT) RETURN THE DENSITY
C-------------------------------------------------------------------------
C INTEGER MID = GET_U_PID(IP)
C         IP    :     PROPERTY NUMBER
C         THIS FUNCTION RETURN THE USER PROPERTY ID CORRESPONDING TO
C         USER PROPERTY NUMBER IP. 
C-------------------------------------------------------------------------
C INTEGER PID = GET_U_MID(IM)
C         IM   :     MATERIAL NUMBER
C         THIS FUNCTION RETURN THE USER MATERIAL ID CORRESPONDING TO
C         USER MATERIAL NUMBER IM. 
C-------------------------------------------------------------------------
C-----------------------------------------------
C   I m p l i c i t   T y p e s
C-----------------------------------------------
#include      "implicit_f.inc"
C----------------------------------------------------------
C   D u m m y   A r g u m e n t s   a n d   F u n c t i o n
C----------------------------------------------------------
      INTEGER IOUT,NUVAR,NEL,IPROP,   
     .        IX(4,NEL) ,
     .        get_u_pnu,get_u_pid,get_u_mid,get_u_mnu,
     .        kfunc,kmat,kprop
      my_real
     .        xl(nel) ,mass(nel) ,xiner(nel) ,stifm(nel) ,
     .        stifr(nel),viscm(nel) ,viscr(nel),uvar(nuvar,*),
     .        get_u_mat,get_u_geo
      EXTERNAL get_u_pnu,get_u_mnu,get_u_mat,get_u_geo,get_u_pid,
     .         get_u_mid
      parameter(kfunc=29)
      parameter(kmat=31)
      parameter(kprop=33)
C=======================================================================
C-----------------------------------------------
C   L o c a l   V a r i a b l e s
C-----------------------------------------------
      my_real
     .        amas,amas2,elastif
      INTEGER I,IDENS
C-----------------------------------------------
        amas     = get_u_geo(1,iprop)
        amas2    = amas
        elastif  = get_u_geo(2,iprop)
        idens    = int(get_u_geo(12,iprop))
 
C
C       MEAN VALUES
C
C--------------------------------------
C       ELEMENT CHECK
C--------------------------------------
        DO i=1,nel
          IF(xl(i)== zero)THEN
            WRITE(iout,*)' **ERROR: ZERO LENGTH SPRING :'
          ENDIF
        ENDDO
C--------------------------------------
C       ELEMENT INITIALIZATION
C--------------------------------------
        DO i=1,nel
          IF (idens == 0 )THEN
             amas2 = amas* xl(i)
          ENDIF
          mass(i)   = amas2
          xiner(i)  = zero
C
C Initialization of UVAR(1,I) with the delta length of the spring
C
          uvar(1,i) = zero
          uvar(2,i) = one
C
C Initialization of UVAR(3,I) with the initial length of the spring at time=0
C
          uvar(3,i) = xl(i)
C
C Initialization of UVAR(4,I) with Zero (will be the Force of previous cycle)
C
          uvar(4,i) = zero
C
C FOR NODAL AND ELEMENT TIME STEP COMPUTATION
C         STIFM(I) = ELASTIF / XL(I)
          stifm(i) = elastif
          stifr(i) = zero
          viscm(i) = zero
          viscr(i) = zero
        ENDDO
C
      RETURN
      END