qdlen2.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/.
!||====================================================================
!||    qdlen2    ../engine/source/elements/solid_2d/quad/qdlen2.F
!||--- called by ------------------------------------------------------
!||    bforc2    ../engine/source/ale/bimat/bforc2.F
!||    q4forc2   ../engine/source/elements/solid_2d/quad4/q4forc2.F
!||    qforc2    ../engine/source/elements/solid_2d/quad/qforc2.F
!||--- uses       -----------------------------------------------------
!||    ale_mod   ../common_source/modules/ale/ale_mod.F
!||====================================================================
      SUBROUTINE qdlen2(Y1,Y2,Y3,Y4,Z1,Z2,Z3,Z4,AIRE,DELTAX,IPARG)
C-----------------------------------------------
C   M o d u l e s
C-----------------------------------------------
      USE ale_mod           
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      "com01_c.inc"
#include      "vect01_c.inc"
C-----------------------------------------------
C   D u m m y   A r g u m e n t s
C-----------------------------------------------
      INTEGER IPARG(63:63)
      my_real
     .   y1(*),y2(*),y3(*),y4(*),z1(*),z2(*),z3(*),z4(*),
     .   aire(*),deltax(*)
C-----------------------------------------------
      INTEGER I, NFAC, ISFLUID
      my_real
     .   al1(mvsiz), al2(mvsiz), al3(mvsiz), al4(mvsiz), almx(mvsiz),
     .   xoff(mvsiz), atest(mvsiz)
C-----------------------------------------------
C
      DO i=lft,llt
        xoff(i)=one
      ENDDO
C
      isfluid=iparg(63)
 
      IF(ale%GLOBAL%ICAA==1 .AND. n2d==2 .AND. isfluid==1 .AND. jeul+jale/=0)THEN
        DO  i=lft,llt
          al1(i)=(z3(i)-z1(i))*(z3(i)-z1(i))+(y3(i)-y1(i))*(y3(i)-y1(i))
          al2(i)=(z4(i)-z2(i))*(z4(i)-z2(i))+(y4(i)-y2(i))*(y4(i)-y2(i))
          almx(i)=fourth*(al1(i)+al2(i))
        ENDDO
      ELSE
      DO i=lft,llt
        al1(i)=(z2(i)-z1(i))*(z2(i)-z1(i))+(y2(i)-y1(i))*(y2(i)-y1(i))
        al2(i)=(z3(i)-z2(i))*(z3(i)-z2(i))+(y3(i)-y2(i))*(y3(i)-y2(i))
        al3(i)=(z4(i)-z3(i))*(z4(i)-z3(i))+(y4(i)-y3(i))*(y4(i)-y3(i))
        al4(i)=(z4(i)-z1(i))*(z4(i)-z1(i))+(y4(i)-y1(i))*(y4(i)-y1(i))
      ENDDO
C
      DO i=lft,llt
        almx(i) = max(al1(i),al2(i),al3(i),al4(i))
      ENDDO
C
      DO i=lft,llt
        al1(i)=(z3(i)-z1(i))*(z3(i)-z1(i))+(y3(i)-y1(i))*(y3(i)-y1(i))
        al2(i)=(z4(i)-z2(i))*(z4(i)-z2(i))+(y4(i)-y2(i))*(y4(i)-y2(i))
      ENDDO
C
      DO i=lft,llt
        almx(i) = max(al1(i),al2(i),almx(i))
      ENDDO
C
      IF(ale%GLOBAL%ICAA==0 .OR. jeul+jale==0)THEN
        DO i=lft,llt
          atest(i)=em4*almx(i)
        ENDDO
        DO i=lft,llt
          nfac=0
          IF(al1(i)<atest(i)) nfac=nfac+1
          IF(al2(i)<atest(i)) nfac=nfac+1
          IF(al3(i)<atest(i)) nfac=nfac+1
          IF(al4(i)<atest(i)) nfac=nfac+1
          IF(nfac>=2) xoff(i)=ep03
        ENDDO
      ENDIF
C
      ENDIF
      DO i=lft,llt
        deltax(i)=aire(i)*xoff(i)/sqrt(almx(i))
      ENDDO
C
      RETURN
      END