r4sumg3.F

Go to the documentation of this file.

Copyright>        OpenRadioss
Copyright>        Copyright (C) 1986-2025 Altair Engineering Inc.
Copyright>
Copyright>        This program is free software: you can redistribute it and/or modify
Copyright>        it under the terms of the GNU Affero General Public License as published by
Copyright>        the Free Software Foundation, either version 3 of the License, or
Copyright>        (at your option) any later version.
Copyright>
Copyright>        This program is distributed in the hope that it will be useful,
Copyright>        but WITHOUT ANY WARRANTY; without even the implied warranty of
Copyright>        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
Copyright>        GNU Affero General Public License for more details.
Copyright>
Copyright>        You should have received a copy of the GNU Affero General Public License
Copyright>        along with this program.  If not, see <https://www.gnu.org/licenses/>.
Copyright>
Copyright>
Copyright>        Commercial Alternative: Altair Radioss Software
Copyright>
Copyright>        As an alternative to this open-source version, Altair also offers Altair Radioss
Copyright>        software under a commercial license.  Contact Altair to discuss further if the
Copyright>        commercial version may interest you: https://www.altair.com/radioss/.
!||====================================================================
!||    r4sumg3      ../engine/source/elements/spring/r4sumg3.F
!||--- called by ------------------------------------------------------
!||    r4ke3        ../engine/source/elements/spring/r4ke3.F
!||    ruser32ke3   ../engine/source/elements/spring/ruser32ke3.F
!||    tke3         ../engine/source/elements/truss/tke3.F
!||====================================================================
      SUBROUTINE r4sumg3(JFT    ,JLT    ,AL      ,KX      ,R11    ,
     3                   R21    ,R31    ,KE11    ,KE12    ,KE22   )
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
#include      "implicit_f.inc"
C-----------------------------------------------
C   D U M M Y   A R G U M E N T S
C-----------------------------------------------
      INTEGER JFT,JLT
      my_real 
     .    al(*),kx(*),r11(*),r21(*),r31(*)
       my_real
     .    ke11(3,3,*),ke22(3,3,*),ke12(3,3,*)
C-----------------------------------------------
C   L O C A L   V A R I A B L E S
C-----------------------------------------------
      INTEGER I, J, EP
C---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
C---------------------------------------
C   TRANS LOCAL-->GLOBAL 
C---------------------------------------
       DO ep=jft,jlt
        ke11(1,1,ep)=kx(ep)*r11(ep)*r11(ep)
        ke11(1,2,ep)=kx(ep)*r11(ep)*r21(ep)
        ke11(1,3,ep)=kx(ep)*r11(ep)*r31(ep)
        ke11(2,2,ep)=kx(ep)*r21(ep)*r21(ep)
        ke11(2,3,ep)=kx(ep)*r21(ep)*r31(ep)
        ke11(3,3,ep)=kx(ep)*r31(ep)*r31(ep)
       ENDDO 
       DO i=1,3 
        DO j=i,3 
         DO ep=jft,jlt
          ke22(i,j,ep)=ke11(i,j,ep)
          ke12(i,j,ep)=-ke11(i,j,ep)
         ENDDO
        ENDDO
       ENDDO
       DO i=1,3 
        DO j=i+1,3 
         DO ep=jft,jlt
          ke12(j,i,ep)=-ke11(i,j,ep)
         ENDDO
        ENDDO
       ENDDO
C
      RETURN
      END