accdtdc.F

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!||====================================================================
!||    accdtdc   ../engine/source/elements/thickshell/solidec/accdtdc.F
!||--- called by ------------------------------------------------------
!||    resol     ../engine/source/engine/resol.F
!||====================================================================
      SUBROUTINE accdtdc(EFTSK ,ELTSK ,IENUNL ,ALPHA_DC, A       ,MS   ,ITAB )
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
C-----------------------------------------------
      INTEGER EFTSK ,ELTSK ,IENUNL(2,*), ITAB(*)
      my_real
     .   a(3,*) ,alpha_dc(*),ms(*)
C-----------------------------------------------
C   L o c a l   V a r i a b l e s
C-----------------------------------------------
      INTEGER  I,N1,N2,inn
      my_real
     .     am(3),ad(3),alpha_1,f1(3),f2(3),mss_1
C-----------------------------------------------
C   S o u r c e   L i n e s
C-----------------------------------------------     
      
      !------------------------------------------------!
      !       MODIF  ACCELERATIONS (TRANSLATIONS) !
      !------------------------------------------------!
#include "vectorize.inc"
      DO i=eftsk ,eltsk
        n1= ienunl(1,i)
        n2= ienunl(2,i)
        IF (max(alpha_dc(n1),alpha_dc(n2))<=one) cycle
        IF (max(ms(n1),ms(n2))==zero) cycle
        IF (ms(n1)==zero) THEN
          f1(1:3) = a(1:3,n1)
        ELSE
          f1(1:3) = ms(n1)*a(1:3,n1)
        END IF
        IF (ms(n2)==zero) THEN
          f2(1:3) = a(1:3,n2)
        ELSE
          f2(1:3) = ms(n2)*a(1:3,n2)
        END IF
        mss_1 = one/(ms(n1)+ms(n2))
        am(1:3) = (f1(1:3)+f2(1:3))*mss_1
        ad(1:3) = (f2(1:3)-f1(1:3))*mss_1
        alpha_1 =one/max(alpha_dc(n1),alpha_dc(n2))
        a(1:3,n1) = am(1:3) - ad(1:3)*alpha_1
        a(1:3,n2) = am(1:3) + ad(1:3)*alpha_1
      END DO 
C      
      RETURN
      END