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SUBROUTINE FA1
C
C FA1 IS THE DRIVER FOR PART ONE OF FLUTTER ANALYSIS
C
INTEGER SYSBUF,OUT,BUFF,BUFF1,NS(2),FLOOP,TSTART,
1 KHH,BHH,MHH,QHHL,CASECC,FLIST,FSAVE,KXHH,MXHH,
2 BXHH,SCR1,REC0(8),FLUT(10),IMETH(2),FMETHD,SMETH,
3 TRL(10),AERO(2),FLFACT(2),FLUTER(2),
4 SR,SM,SK,PR,PM,PK,SL,IBLOCK(12),METHOD(4)
REAL BLOCK(12),REC(8),KFREQ,RHO
DIMENSION DLT(3),Z(1)
CHARACTER UFM*23
COMMON /XMSSG / UFM
COMMON /SYSTEM/ SYSBUF,OUT
COMMON /BLANK / FLOOP,TSTART,ICEAD
COMMON /OUTPUT/ HDG(96)
COMMON /PACKX / ITI,ITO,IJ,NN,INCR1
COMMON /ZZZZZZ/ IZ(1)
COMMON /UNPAKX/ IOUT,II,JJ,INCR
EQUIVALENCE (REC0(1),REC(1))
EQUIVALENCE (BLOCK(1),IBLOCK(1))
EQUIVALENCE (IZ(1),Z(1))
DATA KHH /101/, BHH /102/, MHH /103/, QHHL /104/, CASECC /105/
1, FLIST /106/, FSAVE /201/, KXHH /202/, BXHH /203/, MXHH /204/
DATA SCR1/301/, NS /4HFA1 ,4H /
DATA IMETH / 4HS ,4HL /
DATA NMD /4 /, METHOD/4HK ,4HKE ,4HPK ,4HINV /
DATA TRL / 90,1006,7*0,6 /
DATA AERO / 3202,32 /, FLFACT /4102,41/, FLUTER /3902,39/
C
DO 5 I = 1,12
5 IBLOCK(I) = 0
NCORE = KORSZ(IZ)
BUFF = NCORE - SYSBUF - 1
BUFF1 = BUFF - SYSBUF
IF (FLOOP .NE. 0) GO TO 200
C
C FIRST TIME THROUGH FIND FMETHOD ON CASECC
C
IFILE = CASECC
CALL GOPEN (CASECC,IZ(BUFF+1),0)
CALL READ (*530,*10,CASECC,IZ,BUFF,1,NWR)
10 LCC = NWR
CALL CLOSE (CASECC,1)
C
C GET DATA FOR REC0 OF FSAVE
C
CALL FNAME (FSAVE,REC0)
IFILE = FLIST
CALL PRELOC (*480,IZ(BUFF+1),FLIST)
CALL LOCATE (*470,IZ(BUFF+1),AERO,IDUM)
CALL READ (*530,*530,FLIST,REC0(4),4,1,NWR)
REC(6) = REC(6)*0.5
CALL LOCATE (*15,IZ(BUFF+1),FLFACT,IDUM)
CALL READ (*530,*20,FLIST,IZ(LCC+1),BUFF,1,NWR)
GO TO 400
15 NWR = 0
20 LFL = NWR + LCC
CALL LOCATE (*450,IZ(BUFF+1),FLUTER,IDUM)
30 CALL READ (*530,*450,FLIST,FLUT,10,0,NWR)
I165 = 165
IF (FLUT(1) .NE. IZ(I165)) GO TO 30
CALL CLOSE (FLIST,1)
REC0(8) = FLUT(9)
IEP = FLUT(10)
DO 40 I = 1,NMD
IF (FLUT(2) .EQ. METHOD(I)) GO TO 50
40 CONTINUE
GO TO 490
50 REC0(3) = I
FMETHD = I
GO TO (60,60,61,490), I
60 REC0(4) = 0
IF (FLUT(7) .EQ. IMETH(1)) REC0(4) = 1
IF (FLUT(7) .EQ. IMETH(2)) REC0(4) = 2
IF (REC0(4) .EQ. 0) GO TO 430
SMETH = REC0(4)
GO TO 65
C
C PK METHOD HAS LINEAR SPLINE ONLY
C
61 REC0(4) = 2
SMETH = 2
65 CONTINUE
C
C BUILD RECORDS 0,1,2,3 OF SAVE
C
IFILE = FSAVE
CALL OPEN (*480,FSAVE,IZ(BUFF+1),1)
CALL WRITE (FSAVE,REC0,8,1)
BREF = REC(6)
RREF = REC(7)
NEIW = REC0(8)
C
C BUILD M,K,RHO LIST FOR FLUTTER LOOP
C
SR = 0
SM = 0
SK = 0
I = LCC
IF (I .EQ. LFL) GO TO 410
70 I = I + 1
IF (IZ(I) .EQ. FLUT(4)) SR = I
IF (IZ(I) .EQ. FLUT(5)) SM = I
IF (IZ(I) .EQ. FLUT(6)) SK = I
80 I = I + 1
IF (I .GE. LFL) GO TO 90
IF (IZ(I) .EQ. -1) GO TO 70
GO TO 80
90 IF (SR.EQ.0 .OR. SM.EQ.0 .OR. SK.EQ.0) GO TO 410
NRHO = 0
PR = SR
95 PR = PR + 1
IF (IZ(PR) .EQ. -1) GO TO 97
NRHO = NRHO + 1
GO TO 95
97 NLOOPS = 0
IF (FMETHD .NE. 3) GO TO 105
C
C J.PETKAS/LOCKHEED 3/91
C 19 LINES OF OLD CODE FOR BUILDING ELEMENTS OF FSAVE FOR PK METHOD
C WERE IN ERROR, AND ARE NOW REPLACED BY NEXT 29 NEW LINES
C
PM = SM
101 PM = PM + 1
IF (IZ(PM) .EQ. -1) GO TO 130
DLT(1) = Z(PM)
C
C CENTER LOOP ON RHO
C
PR = SR
102 PR = PR + 1
IF (IZ(PR) .EQ. -1) GO TO 101
DLT(3) = Z(PR)
C
C INNER LOOP ON VELOCITY
C
PK = SK
103 PK = PK + 1
IF (IZ(PK) .EQ. -1) GO TO 102
DLT(2) = Z(PK)
NLOOPS = NLOOPS + 1
CALL WRITE (FSAVE,DLT,3,0)
GO TO 103
C
C ALGORITHM FOR BUILDING ELEMENTS OF FSAVE FOR K AND KE METHODS
C
105 CONTINUE
C
C OUTER LOOP ON MACH NUMBER
C
PM = SM
107 PM = PM + 1
IF (IZ(PM) .EQ. -1) GO TO 130
DLT(1) = Z(PM)
C
C CENTER LOOP ON KFREQ
C
PK = SK
110 PK = PK + 1
IF (IZ(PK) .EQ. -1) GO TO 107
DLT(2) = Z(PK)
C
C INNER LOOP ON RHO
C
PR = SR
120 PR = PR + 1
IF (IZ(PR) .EQ. -1) GO TO 110
DLT(3) = Z(PR)
NLOOPS = NLOOPS + 1
CALL WRITE (FSAVE,DLT,3,0)
GO TO 120
130 CALL WRITE (FSAVE,0,0,1)
C
C PICK UP M AND K FROM QHHL
C
IFILE = QHHL
CALL OPEN (*480,QHHL,IZ(BUFF1+1),0)
CALL READ (*530,*140,QHHL,IZ(LCC+1),BUFF1,1,NWR)
GO TO 400
140 LFL = NWR + LCC
SL = LCC + 5
CALL CLOSE (QHHL,1)
REC0(1) = QHHL
CALL RDTRL (REC0)
NP = MIN0(IZ(SL-1),REC0(2)/REC0(3))
LFL = MIN0(LFL,2*NP+SL-1)
NP = LFL - SL + 1
CALL WRITE (FSAVE,IZ(SL),NP,1)
NP = NP/2
C
C WRITE CASECC RECORD AND TRAILER
C
CALL WRITE (FSAVE,IZ(1),LCC,1)
CALL CLOSE (FSAVE,1)
REC0(1) = FSAVE
REC0(2) = FLOOP
REC0(3) = NLOOPS
REC0(4) = NP
REC0(5) = LCC
REC0(6) = 0
REC0(7) = NRHO
CALL WRTTRL (REC0)
GO TO 210
200 IFILE = FSAVE
CALL OPEN (*480,FSAVE,IZ(BUFF+1),0)
CALL READ (*530,*530,FSAVE,IZ(1),8,1,NWR)
CALL CLOSE (FSAVE,1)
IZX = 0
FMETHD= IZ(IZX+3)
SMETH = IZ(IZX+4)
BREF = Z(IZX+6)
RREF = Z(IZX+7)
NEIW = IZ(IZX+8)
210 REC0(1) = FSAVE
CALL RDTRL (REC0)
C
C START OF LOOPING BUMP LOOP COUNTER SET TIME AND GO
C
FLOOP = FLOOP + 1
NLOOPS= REC0(3)
CALL KLOCK (TSTART)
GO TO (220,230,240,490), FMETHD
C
C K METHOD BUILD PROPER QHH ON SCR1
C
220 CALL FA1K (SMETH,KFREQ,RHO,SCR1,0)
GO TO 300
C
C KE METHOD DO INCORE EIGNVALUE EXTRACTION
C
230 REC0(1) = BHH
CALL RDTRL (REC0)
IF (REC0(1).GT.0 .AND. REC0(7).GT.0) GO TO 510
REC0(1) = KHH
CALL RDTRL (REC0)
ICO = REC0(2)*REC0(2)*4 + 4
235 CALL FA1K (SMETH,KFREQ,RHO,SCR1,ICO)
CALL FA1KE (SCR1,KFREQ,BREF,RHO,RREF,FLOOP,NLOOPS)
IF (FLOOP .GE. NLOOPS) GO TO 350
FLOOP = FLOOP + 1
GO TO 235
C
C PK METHOD LINEAR INTERPOLATION AND INCORE LOOP FOR
C EIGENVALUE CONVERGENCE
C
240 CALL FA1PKI (FSAVE,QHHL)
CALL FA1PKE (KHH,BHH,MHH,BXHH,FSAVE,NLOOPS,BREF,RREF,NEIW,IEP)
IF (FLOOP .GE. NLOOPS) GO TO 250
FLOOP = FLOOP + 1
GO TO 240
C
C PHID - KXHH CLAMAD - BXHH
C
250 IBUF = BUFF1 - SYSBUF
TRL(1) = SCR1
CALL RDTRL (TRL)
IF (TRL(2) .EQ. 0) GO TO 350
CALL OPEN (*350,SCR1,Z(IBUF),0)
CALL READ (*290,*255,SCR1,REC,6,1,NWR)
255 CALL READ (*290,*260,SCR1,Z,IBUF,1,NWR)
260 NN = NWR/2
CALL GOPEN (KXHH,Z(BUFF),1)
CALL GOPEN (BXHH,Z(BUFF1),1)
CALL WRITE (BXHH,TRL(1),50,0)
CALL WRITE (BXHH,HDG,96,1)
TRL(1) = KXHH
TRL(2) = 0
TRL(3) = NN
TRL(4) = 2
TRL(5) = 3
ITI = 3
ITO = 3
IJ = 1
INCR1 = 1
265 CALL WRITE (BXHH,REC,6,0)
CALL PACK (Z,KXHH,TRL)
CALL READ (*280,*270,SCR1,REC,6,1,NWR)
270 CALL READ (*280,*265,SCR1,Z,IBUF,1,NWR)
280 CALL WRITE (BXHH,0,0,1)
CALL CLOSE (BXHH,1)
CALL CLOSE (KXHH,1)
CALL WRTTRL (TRL)
TRL(1) = BXHH
TRL(2) = 1006
TRL(7) = 0
CALL WRTTRL (TRL)
290 CALL CLOSE (SCR1,1)
GO TO 350
C
C COPY KHH TO KXHH
C
300 CALL GOPEN (KHH,IZ(BUFF+1),0)
CALL GOPEN (KXHH,IZ(BUFF1+1),1)
REC0(1) = KHH
CALL RDTRL (REC0)
REC0(1) = KXHH
IOUT = REC0(5)
INCR = 1
I = REC0(2)
REC0(2) = 0
REC0(6) = 0
REC0(7) = 0
CALL CYCT2B (KHH,KXHH,I,Z,REC0)
CALL CLOSE (KHH,1)
CALL CLOSE (KXHH,1)
CALL WRTTRL (REC0)
C
C BUILD BXHH = (K/B)BHH
C
REC0(1) = BHH
CALL RDTRL (REC0)
IF (REC0(1) .LE. 0) GO TO 310
IBLOCK(2) = 1
BLOCK(3) = KFREQ/BREF
CALL SSG2C (BHH,0,BXHH,0,BLOCK(2))
310 CONTINUE
C
C 2 2
C MXHH = (K /B ) MHH + (RHO*RREF/2.0) QHH
C
IBLOCK(2) = 1
BLOCK (3) = (KFREQ*KFREQ)/(BREF*BREF)
IBLOCK(8) = 1
BLOCK (9) = RHO*RREF/2.0
CALL SSG2C (MHH,SCR1,MXHH,0,BLOCK(2))
C
C THE END
C
350 CONTINUE
REC0(1) = FSAVE
CALL RDTRL (REC0)
REC0(2) = FLOOP
CALL WRTTRL (REC0)
IF (FLOOP .EQ. NLOOPS) FLOOP = -1
ICEAD = 1
IF (FMETHD .EQ. 2) ICEAD = -1
IF (FMETHD .EQ. 3) ICEAD = -1
GO TO 600
C
C ERROR MESSAGES
C
400 CALL MESAGE (-8,0,NS)
410 WRITE (OUT,420) UFM,FLUT(4),FLUT(5),FLUT(6)
420 FORMAT (A23,', ONE OR MORE OF THE FOLLOWING FLFACT SETS WERE NOT',
1 ' FOUND - ',3I9)
GO TO 540
430 WRITE (OUT,440) UFM,FLUT(7)
440 FORMAT (A23,' 2267, INTERPOLATION METHOD ',A4,' UNKNOWN')
GO TO 540
450 I165 = 165
WRITE (OUT,460) UFM,IZ(I165)
460 FORMAT (A23,' 2268, FMETHOD SET',I9,' NOT FOUND')
GO TO 540
470 CALL MESAGE (-7,0,NS)
480 CALL MESAGE (-1,IFILE,NS)
490 WRITE (OUT,500) UFM,FLUT(2)
500 FORMAT (A23,' 2269, FLUTTER METHOD ',A4,' NOT IMPLEMENTED')
GO TO 540
510 WRITE (OUT,520) UFM,FLUT(2)
520 FORMAT (A23,', FLUTTER METHOD ',A4,' NOT IMPLEMENTED WITH B ',
1 'MATRIX')
GO TO 540
530 CALL MESAGE (-3,IFILE,NS)
540 CALL MESAGE (-61,0,NS)
C
600 RETURN
END
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