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128 lines
4.1 KiB
128 lines
4.1 KiB
C Copyright(C) 1999-2020 National Technology & Engineering Solutions
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C of Sandia, LLC (NTESS). Under the terms of Contract DE-NA0003525 with
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C NTESS, the U.S. Government retains certain rights in this software.
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C
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C See packages/seacas/LICENSE for details
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C========================================================================
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*DECK, ELTON0
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SUBROUTINE ELTON0(ICONA,NELTN,SOLEA,SOLENA,
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& IDBLK,XA,YA,ZA,ISTP,ITT,iblk)
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C *********************************************************************
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C Subroutine ELTON0 extracts nodal values of element variables by
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C looping over each element and summing the value of the variable
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C at that element to each node in the connectivity list for that
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C element. Then the nodal summation of element variables is divided
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C by the number of elements that contributed to that node (resulting
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C in a nodal average of the element value.) This is done for the old
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C mesh elements and nodes to facilitate interpolation.
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C Each element block must be processed independently in order to
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C avoid averaging element variables across material boundaries.
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C Note: the last set of DO loops acts over all nodes; to make sense
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C one element block must be completely processed before another
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C element block is sent into this subroutine.
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C Calls subroutine VOL
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c Called by MAPVAR
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C *********************************************************************
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C ICONA mesh-A connectivity (1:nelnda,1:numeba)
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C NELTN number of elements tied to each node (1:nodesa)
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C SOLEA element variables (1:numeba,1:nvarel)
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C SOLENA element variables at nodes (1:nodesa,1:nvarel)
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C IDBLK current element block I.D.
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C XA,YA,ZA coordinates
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C XX,YY,ZZ vector of coordinates of nodes for an element
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C ISTP current time step
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C ITT truth table
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C iblk element block being processed (not ID)
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C *********************************************************************
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include 'aexds1.blk'
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include 'aexds2.blk'
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include 'amesh.blk'
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include 'ebbyeb.blk'
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include 'ex2tp.blk'
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include 'tapes.blk'
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DIMENSION ICONA(NELNDA,*), NELTN(*)
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DIMENSION SOLEA(NUMEBA,*), SOLENA(NODESA,NVAREL), ITT(NVAREL,*)
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DIMENSION XA(*), YA(*), ZA(*), XX(27), YY(27), ZZ(27)
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C *********************************************************************
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IF (ITYPE .EQ. 4 .OR. ITYPE .EQ. 5)THEN
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CALL ERROR('ELTON0','ELEMENT TYPE',' ',ITYPE,
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& 'ELEMENT VARIABLE PROCESSING NOT YET IMPLEMENTED',
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& 0,' ',' ',1)
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END IF
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DO I = 1, NODESA
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NELTN(I) = 0
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DO J = 1, NVAREL
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SOLENA(I,J) = 0.
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end do
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end do
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C NNODES = NNELM(ITYPE)
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NNODES = NELNDA
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IF (ITYPE .EQ. 6) NNODES = 4
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DO NEL = 1, NUMEBA
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DO I = 1, NNODES
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C number of elements associated with each node - used for
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C computing an average later on
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NELTN(ICONA(I,NEL)) = NELTN(ICONA(I,NEL)) + 1
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end do
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end do
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DO IVAR = 1, NVAREL
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IF (ITT(IVAR,iblk) .EQ. 0)GO TO 40
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CALL EXGEV(NTP2EX,ISTP,IVAR,IDBLK,NUMEBA,SOLEA(1,IVAR),IERR)
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IF (NAMVAR(nvargp+IVAR)(1:6) .EQ. 'ELMASS') THEN
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C replace element mass with nodal density for interpolation
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DO IEL = 1, NUMEBA
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DO I = 1, NNODES
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XX(I) = XA(ICONA(I,IEL))
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YY(I) = YA(ICONA(I,IEL))
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IF (NDIMA .EQ. 3)THEN
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ZZ(I) = ZA(ICONA(I,IEL))
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ELSE
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ZZ(I) = 0.
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END IF
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end do
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CALL VOL(ITYPE,XX,YY,ZZ,VOLUME)
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SOLEA(IEL,IVAR) = SOLEA(IEL,IVAR) / VOLUME
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end do
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END IF
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C accumulate element variables to nodes
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DO NEL = 1, NUMEBA
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DO I = 1, NNODES
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SOLENA(ICONA(I,NEL),IVAR) =
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& SOLENA(ICONA(I,NEL),IVAR) + SOLEA(NEL,IVAR)
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end do
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end do
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C divide by number of elements contributing to each node (average)
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DO I = 1, NODESA
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IF(NELTN(I) .NE. 0)THEN
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SOLENA(I,IVAR) = SOLENA(I,IVAR) / dble(NELTN(I))
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END IF
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end do
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40 CONTINUE
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end do
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RETURN
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END
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