joint_elem_timestep.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/.
!||====================================================================
!||    joint_elem_timestep   ../engine/source/elements/joint/joint_elem_timestep.F
!||--- called by ------------------------------------------------------
!||    resol                 ../engine/source/engine/resol.F
!||--- uses       -----------------------------------------------------
!||    elbufdef_mod          ../common_source/modules/mat_elem/elbufdef_mod.F90
!||====================================================================
      SUBROUTINE joint_elem_timestep(MS,IN,STIFN,STIFR,IXR,IPART,
     1                               IPARTR,IGEO,GEO,NPBY,IPARG,ELBUF_TAB,
     2                               DT2T,NELTST,ITYPTST,NRBODY,ITAB)
C-----------------------------------------------
C   M o d u l e s
C-----------------------------------------------
      USE elbufdef_mod
C-----------------------------------------------
C   I m p l i c i t   T y p e s
C-----------------------------------------------
#include      "implicit_f.inc"
C-----------------------------------------------
C   C o m m o n   B l o c k s
C-----------------------------------------------
#include      "com01_c.inc"
#include      "param_c.inc"
#include      "scr02_c.inc"
#include      "scr17_c.inc"
#include      "scr18_c.inc"
#include      "sms_c.inc"
C-----------------------------------------------
C   D u m m y   A r g u m e n t s
C-----------------------------------------------
      INTEGER IXR(NIXR,*),IPART(LIPART1,*),IPARTR(*),
     .   IGEO(NPROPGI,*),NPBY(NNPBY,*),
     .   iparg(nparg,*),neltst,ityptst,nrbody,itab(*)
      my_real stifn(*), stifr(*),ms(*) ,in(*),geo(npropg,*),dt2t      
      TYPE(elbuf_struct_), TARGET, DIMENSION(NGROUP) :: ELBUF_TAB
C-----------------------------------------------
C   L o c a l   V a r i a b l e s
C-----------------------------------------------
      INTEGER I,J,K,M1,M2,IG,IGTYP,KAD,ITYP,NG,JFT,JLT,NEL,
     .        NB8,NFT,NUVAR,IRB,NV
      my_real dtn,dtr,dtrb1,dtrb2,dt
      TYPE(g_bufel_),POINTER :: GBUF
C----------------------------------------------------------      
      
      IF ((nodadt==0).AND.(idtmins/=2)) THEN
C      
      DO ng=1,ngroup
        ityp = iparg(5,ng)
          nel = iparg(2,ng)
          nft = iparg(3,ng) 
          jft = 1
          jlt = min(nvsiz,nel)  
        gbuf => elbuf_tab(ng)%GBUF
          IF (ityp == 6) THEN
C
C--------> Boucle sur les elements ressort -------
          DO i=jft,jlt
              j = i + nft    
            ig = ipart(2,ipartr(j))
            igtyp =  igeo(11,ig)
              nuvar =  nint(geo(25,ig))
            nv = nuvar*(i-1) + 1
            IF (igtyp==45) THEN    
C           
C--------> Calcul pas de temps nodal RB1 -------         
                irb = nint(gbuf%VAR(nv + 37))
              IF (irb > 0) THEN
                  m1 = npby(1,irb)
              ELSE
                m1 = ixr(2,j)
              ENDIF 
                dtrb1 = dtfac1(11)*sqrt(two*ms(m1)/max(em20,stifn(m1)))
              IF (in(m1) > 0) THEN
                  dtrb1 = min(dtrb1,dtfac1(11)*sqrt(two*in(m1)/max(em20,stifr(m1))))
              ENDIF                               
C
C--------> Calcul pas de temps nodal RB2 ------- 
                irb = nint(gbuf%VAR(nv + 38))
              IF (irb > 0) THEN
                  m2 = npby(1,irb)
              ELSE
                m2 = ixr(3,j)
              ENDIF            
                dtrb2 = dtfac1(11)*sqrt(two*ms(m2)/max(em20,stifn(m2)))
              IF (in(m2) > 0) THEN
                  dtrb2 = min(dtrb2,dtfac1(11)*sqrt(two*in(m2)/max(em20,stifr(m2))))
              ENDIF
C
C--------> Calcul pas de temps du Joint ------- 
                dt = min(dtrb1,dtrb2)                
              IF(dt<dt2t) THEN
                dt2t=dt
                ityptst=11
                IF (dtrb1 < dtrb2) THEN
                  neltst = itab(m1)
                ELSE
                  neltst = itab(m2)
                ENDIF
              ENDIF
                
            ENDIF                                                                                
          ENDDO
C    
        ENDIF   
      ENDDO             
C      
      ENDIF
C
      RETURN
                
      END