dt1lawp.F

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!||====================================================================
!||    dt1lawp   ../starter/source/elements/beam/dt1lawp.F
!||--- called by ------------------------------------------------------
!||    pinit3    ../starter/source/elements/beam/pinit3.F
!||====================================================================
      SUBROUTINE dt1lawp(PM,GEO,MAT,MXG,DELTAX,DTX,IGTYP)
C-----------------------------------------------
C   I m p l i c i t   T y p e s
C-----------------------------------------------
#include      "implicit_f.inc"
C-----------------------------------------------
C   G l o b a l   P a r a m e t e r s
C-----------------------------------------------
#include      "mvsiz_p.inc"
C-----------------------------------------------
C   C o m m o n   B l o c k s
C-----------------------------------------------
#include      "param_c.inc"
#include      "vect01_c.inc"
C-----------------------------------------------
C   D u m m y   A r g u m e n t s
C-----------------------------------------------
      INTEGER MAT(MVSIZ), MXG(MVSIZ),IGTYP
C     REAL
      my_real
     .   pm(npropm,*), geo(npropg,*), deltax(mvsiz), dtx(mvsiz)
C-----------------------------------------------
C   L o c a l   V a r i a b l e s
C-----------------------------------------------
      INTEGER I, MX, IG,INEW
C     REAL
      my_real
     .   rho0, g, c1, ssp, c,
     .   iyy, izz, sl2i, shf, dmp, 
     .   dsh, phi, f1, f2, fac, young,cst,fsh
C=======================================================================
        DO i=lft,llt
         mx   = mat(i)
         rho0 = pm( 1,mx)
         g    = pm(22,mx)
         c1   = pm(32,mx)
         ssp  = pm(27,mx)
         ig   = mxg(i)
         iyy  = geo(2,ig)
         izz  = geo(18,ig)
C
         sl2i = geo(1,ig)*deltax(i)**2/ max(em20,izz,iyy)
         cst = six_over_5*pm(20,mx)/g
         fsh = deltax(i)/(one_over_12*sl2i+cst)
         fsh = max(one,fsh)
C
         dmp =max(geo(16,ig),geo(17,ig))
         dmp =dmp*sqrt(two)
         fac =sqrt(one+dmp*dmp)-dmp
C
         dtx(i) = fac * deltax(i) / max(em20,ssp)
         IF (igtyp /= 18) dtx(i) = dtx(i)/sqrt(fsh)
        ENDDO
C-----------
      RETURN
      END