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|
SUBROUTINE ALG13 (IBL,YS,YP,XS,XP,YSEMI,XSEMI,LOG1,LOG2,N,IPRINT,
1 BETA1,BETA2,P,Q,YZERO,T,YONE,XDEL,YDEL,Z,AXIALC,
2 LNCT,IFCORD,SQ,SB,ISECN,XSEMJ,YSEMJ,ISTAK,XHERE,
3 X,SS,NSTNS,R,DX,Y,DY,SS1,BX,SIGMA,CCORD,ISPLIT,
4 YZEROS,TS,YONES,ZSPMXT,PERSPJ,INAST,IRLE,IRTE,
5 THARR)
C
REAL IX,IY,IXY,IPX,IPY,IXD,IYD,IXN,IYN,IXYN
DIMENSION CCORD(1),NAME(2),XXM(81),SNADUM(10),THARR(21,10)
DIMENSION YS(21,80),YP(21,80),XS(21,80),XP(21,80),
1 YSEMI(21,31),XSEMI(21,31),S(80),PHI(11),
2 THICK2(80),XM(81),YM(80),AM(80),XSEMJ(21,31),
3 YSEMJ(21,31),XHERE(100),X(100),SS(100),R(10,21),
4 DX(100),DY(100),SS1(80,4),Y(100),SIGMA(100)
DIMENSION XSPLTM(45),YSPLTM(45),SSPLTM(45),XSPLTS(45),
1 YSPLTS(45),XSPLTP(45),YSPLTP(45),THICK(45)
COMMON /UDSTR2/ NBLDES,STAG(21),CHORDD(21)
DATA NAME / 4HALG1, 4H3 /
C
F1(A) = A*EXP(1.0-A*SQ)*SQ
F2(A) = (SQ-1.0)*A*EXP(1.0+A*(1.0-SQ))
F3(A,B,C,D) = B/A**3*EXP(A*XD)*(A*XD-2.0) + C*(XD+SQ) + D
F4(A,B) = ABS(A-B)/(A-B)
F5(A,B,C) = B/A**2*EXP(A*XD)*(A*XD-1.0) + C
F6(XAB) = SQRT(RDIUS**2-(XAB-X1)**2) + Y1
F7(XAB) =-SQRT(RDIUS**2-(XAB-X1)**2) + Y1
F8(XAB) =-1./SQRT(RDIUS**2-(XAB-X1)**2)*(XAB-X1)
C
10 FORMAT (1H1)
A = 0.
D = 0.
BTA1 = BETA1
BTA2 = BETA2
BETA3= 0.0
PI = 3.1415926535
C1 = 180.0/PI
IF (IPRINT .GE. 2) GO TO 40
WRITE (LOG2,20) IBL,P,Q,BETA1,BETA2,YZERO,T,YONE,Z,AXIALC
20 FORMAT (1H1,44X,43HSTREAMSURFACE GEOMETRY ON STREAMLINE NUMBER,I3,
1 /45X,46(1H*), //20X,1HP,1
25X,1H=,F7.4,6X,72H(D2YDX2 OF MEANLINE AT LEADING EDGE AS A FRACTIO
3N OF ITS MAXIMUM VALUE.), /20X,1HQ,15X,1H=,F7.4,6X,73H(D2YDX2 OF M
4EANLINE AT TRAILING EDGE AS A FRACTION OF ITS MAXIMUM VALUE.), /20
5X,5HBETA1,11X,1H=,F7.3,6X,20H(BLADE INLET ANGLE.), /20X,5HBETA2,11
6X,1H=,F7.3,6X,21H(BLADE OUTLET ANGLE.), /20X,5HYZERO,11X,1H=,F8.5,
75X,51H(BLADE LEADING EDGE RADIUS AS A FRACTION OF CHORD.), /20X,1H
8T,15X,1H=,F8.5,5X,49H(BLADE MAXIMUM THICKNESS AS A FRACTION OF CHO
9RD.), /20X,4HYONE,12X,1H=,F8.5,5X,60H(BLADE TRAILING EDGE HALF-THI
OCKNESS AS A FRACTION OF CHORD.), /20X,1HZ,15X,1H=,F7.4,6X,59H(LOCA
1TION OF MAXIMUM THICKNESS AS A FRACTION OF MEAN LINE.), /20X,4HCOR
2D,12X,1H=,F7.4,6X,39H(CHORD OR MERIDIONAL CHORD OF SECTION.))
IF (ISECN.EQ.1 .OR. ISECN.EQ.3) WRITE (LOG2,30) SQ,SB
30 FORMAT (20X,1HS,15X,1H=,F7.4,6X,53H(INFLECTION POINT AS A FRACTION
1 OF MERIDIONAL CHORD.), /20X,5HBETA3,11X,1H=,F7.3,6X,36H(CHANGE IN
2 ANGLE FROM LEADING EDGE.))
40 IF (IPRINT .EQ. 3) GO TO 55
LNCT = LNCT + 2
IF (LNCT .LE. 60)GO TO 45
LNCT = 3
WRITE (LOG2,10)
45 WRITE (LOG2,50) IBL,P,Q,BETA1,BETA2,YZERO,T,YONE,Z,AXIALC
50 FORMAT (2X, /5X,4HLINE,I3,4H P=,F7.4,4H Q=,F7.4,8H BETA1=,F7.3,
18H BETA2=,F7.3,8H YZERO=,F7.5,6H T/C=,F7.5,7H YONE=,F7.5,4H Z
2=,F7.4,6H AXC=,F7.3)
55 IF (ISECN .EQ. 1) GO TO 60
IF (ISECN .EQ. 3) GO TO 130
IF (ISECN .EQ. 2) GO TO 150
H = 1.0/(1.0+SQRT((1.0-Q)/(1.0-P)))
HH = H*H
OA = 4.0*(TAN(BETA1/C1)-TAN(BETA2/C1))/(P/(1.0-P)*HH+H-1.0/3.0)
OA48 = OA/48.0
XK2 =-HH/(8.0*(1.0-P))*OA
B = HH*H/12.0*OA+TAN(BETA1/C1)
C =-HH*HH*OA48
XMLC = SQRT(1.0+(OA48*(1.0-H)**4+XK2+B+C)**2)
GO TO 160
60 NQ = 1
SB = BETA1+SB
G1 = 1.0/SQ
R1 = F1(G1)
G2 = G1+5.0
R2 = F1(G2)
S2 = F4(R2,P)
70 G3 = G2+(P-R2)*(G2-G1)/(R2-R1)
R3 = F1(G3)
S3 = F4(R3,P)
IF (ABS(R3-P) .LE. 0.0001) GO TO 90
IF (NQ .GT. 50) GO TO 1290
NQ = NQ + 1
IF (ABS(S2-S3) .LE. 0.0001) GO TO 80
G1 = G3
R1 = R3
GO TO 70
80 G2 = G3
R2 = R3
S2 = S3
GO TO 70
90 A1 = G3
NQ = 1
G1 = 1.0/(SQ-1.0)
R1 = F2(G1)
G2 = G1-5.0
R2 = F2(G2)
S2 = F4(R2,Q)
100 G3 = G2+(Q-R2)*(G2-G1)/(R2-R1)
R3 = F2(G3)
S3 = F4(R3,Q)
IF (ABS(R3-Q) .LE. 0.0001) GO TO 120
IF (NQ .GT. 50) GO TO 1290
NQ = NQ + 1
IF (ABS(S2-S3) .LE. 0.0001) GO TO 110
G1 = G3
R1 = R3
GO TO 100
110 G2 = G3
R2 = R3
S2 = S3
GO TO 100
120 A2 = G3
B1 = A1**2*(TAN(BETA1/C1)-TAN(SB/C1))/
1 (1.0-(A1*SQ+1.0)*EXP(-A1*SQ))
CC1= TAN(SB/C1)+B1/A1**2
E1 = (A1*SQ+2.0)*B1/A1**3*EXP(-A1*SQ)
B2 = A2**2*(TAN(BETA2/C1)-TAN(SB/C1))/
1 (1.0+(A2*(1.0-SQ)-1.0)*EXP(A2*(1.0-SQ)))
CC2= TAN(SB/C1)+B2/A2**2
D2 = 2.*(B2/A2**3-B1/A1**3)+SQ*(CC1-CC2) + E1
XD = 1.0-SQ
R2 = F3(A2,B2,CC2,D2)
XMLC = SQRT(1.0+R2**2)
GO TO 160
130 I1 = 1
BETA3 = BETA1+SB
S0 = 0.
X0 = 0.
Y0 = 0.
Y21= 0.0
I2 = FLOAT(N)*SQ
IF (I2 .LE. 1) SQ = 0.0
IF (I2 .LE. 1) BETA3 = BETA1
IF (I2 .LE. 1) GO TO 140
XRNGE = SQ
FACT = SQ
CALL ALG18 (BETA1,BETA3,I1,I2,FACT,X0,Y0,S0,XRNGE,Y11,X11,Y21,
1 RDIUS1,S,C1)
I1 = I2
X0 = SQ
Y0 = Y21
S0 = S(I1)
140 I2 = N
FACT = 1.-SQ
XRNGE = FACT
CALL ALG18 (BETA3,BETA2,I1,I2,FACT,X0,Y0,S0,XRNGE,Y12,X12,Y22,
1 RDIUS2,S,C1)
XMLC = SQRT(1.0+Y22**2)
GO TO 160
150 CALL ALG18 (BETA1,BETA2,1,N,1.0,0.0,0.0,0.0,1.0,Y1,X1,Y2,RDIUS,
1 S,C1)
XMLC = SQRT(1.+Y2**2)
CHORD = XMLC/(1.-2.*YZERO*(1.-XMLC))
FCSLMN= 1.0 - CHORD*2.*YZERO
GO TO 170
160 CHORD = XMLC/(1.0-YZERO+XMLC*(YZERO+ABS(YONE*SIN(BETA2/C1))))
FCSLMN= 1.0 - CHORD*(YZERO+ABS(YONE*SIN(BETA2/C1)))
170 IF (IFCORD .EQ. 1) AXIALC = AXIALC/CHORD
YZERO = YZERO*CHORD/FCSLMN
YONE = YONE*CHORD/FCSLMN
T = T*CHORD/FCSLMN
S(1)= 0.0
XX = 0.0
XN = N
IF (ISECN .EQ. 2) GO TO 240
AT = (YZERO-T/2.0)/(2.0*Z**3)
CT = (T/2.0-YZERO)*3.0/(2.0*Z)
DT = YZERO
ET = (YONE-T/2.0)/(1.0-Z)**3 - 1.5*(YZERO-T/2.0)/(Z**2*(1.0-Z))
FT = 1.5*(YZERO-T/2.0)/Z**2
HT = T/2.0
IF (ISECN .EQ. 3) GO TO 240
DELX = 1.0/(10.0*(XN-1.0))
ASSIGN 190 TO ISEC1
ASSIGN 290 TO ISEC2
IF (ISECN .EQ. 0) GO TO 180
ASSIGN 200 TO ISEC1
ASSIGN 300 TO ISEC2
180 DO 230 J = 2,N
DO 220 JJ = 1,11
GO TO ISEC1, (190,200)
190 PHI(JJ) = SQRT(1.0+(OA/12.0*(XX-H)**3+XK2*2.0*XX+B)**2)
GO TO 220
200 XD = XX - SQ
IF (XD .GT. 0.0) GO TO 210
PHI(JJ) = SQRT(1.0+(F5(A1,B1,CC1))**2)
GO TO 220
210 PHI(JJ) = SQRT(1.+(F5(A2,B2,CC2))**2)
220 XX = XX + DELX
XX = XX - DELX
230 S(J) = S(J-1)+ (PHI(1)+ PHI(11)+ 4.0*(PHI(2)+PHI(4)+PHI(6)+PHI(8)+
1 PHI(10))+2.0*(PHI(3)+PHI(5)+PHI(7)+PHI(9)))/(30.0*(XN-1.0))
240 DELX = 1.0/(XN-1.0)
IF (ISECN .NE. 2) GO TO 250
T2 = T/2.
TPRIM2 = T2 - YZERO
C2 = 2.*C1
AFORM = (TPRIM2+RDIUS*(1.-COS((BETA1-BETA2)/C2)))/XMLC*2.
PHIS = ACOS((1.-AFORM**2)/(1.+AFORM**2))
RS = YZERO + XMLC/2./SIN(PHIS)
YSS = RDIUS - RS + T2
BFORM = (RDIUS*(1.-COS((BETA1-BETA2)/C2))-TPRIM2)/XMLC*2.
PHIP = ACOS((1.-BFORM**2)/(1.+BFORM**2))
PHI2 = ABS((BETA1-BETA2)/C1)
250 XM(1) = 0.0
IF (ISECN .NE. 3) GO TO 260
YMM = 0.0
XMM = 0.0
I2 = SQ*FLOAT(N)
I3 = I2
IF (I2 .LE. 1) I2 = N + 1
DELX= SQ/FLOAT(I2-1)
IF (I3 .NE. I2) I3 = 1
DELXX = (1.-SQ)/FLOAT(N-I3)
IF (I2 .EQ. N+1) DELX = DELXX
260 DO 380 J = 1,N
SN = S(J)/S(N)
IF (ISECN .EQ. 2) GO TO 340
IF (SN .GT. Z) GO TO 270
THICK2(J) = (AT*SN**2+CT)*SN + DT
GO TO 280
270 SN = SN - Z
THICK2(J) = (ET*SN+FT)*SN**2 + HT
280 IF (ISECN .EQ. 3) GO TO 320
GO TO ISEC2, (290,300)
290 YM(J) = OA48*(XM(J)-H)**4+XK2*XM(J)**2 + B*XM(J) + C
YPRIME = OA/12.0*(XM(J)-H)**3 + XK2*2.0*XM(J) + B
GO TO 370
300 XD = XM(J) - SQ
IF (XD .GT. 0.0) GO TO 310
YM(J) = F3(A1,B1,CC1,E1)
YPRIME = F5(A1,B1,CC1)
GO TO 370
310 YM(J) = F3(A2,B2,CC2,D2)
YPRIME = F5(A2,B2,CC2)
GO TO 370
320 IF (XM(J)-SQ.GT.0.0 .OR. XM(J).EQ.0.0 .AND. SQ.EQ.0.0) GO TO 330
IF (BETA1 .EQ. BETA3) GO TO 360
BTA1 = BETA1
BTA2 = BETA3
RDIUS = RDIUS1
Y1 = Y11
X1 = X11
GO TO 350
330 IF (BETA2 .EQ. BETA3) GO TO 360
RDIUS = RDIUS2
X1 = X12
Y1 = Y12
BTA1 = BETA3
BTA2 = BETA2
GO TO 350
340 PHIX = (SN-0.5)*PHI2
THICK2(J) = YSS*COS(PHIX) + SQRT(RS**2-YSS**2*SIN(PHIX)**2) -RDIUS
350 YM(J) = F6(XM(J))
YPRIME = F8(XM(J))
IF (BTA1-BTA2 .LT. 0.0) YPRIME = -YPRIME
IF (BTA1-BTA2 .LT. 0.0) YM(J) = F7(XM(J))
IF (ISECN .EQ. 2) GO TO 370
IF (J .EQ. I3) DELX = DELXX
GO TO 370
360 YPRIME = TAN(BETA3/C1)
IF (J .NE. 1) XMM = XM(J-1)/FCSLMN - YZERO
IF (J .NE. 1) YMM = YM(J-1)/FCSLMN
YM(J) = YPRIME*(XM(J)-XMM) + YMM
IF (J .EQ. I3) DELX = DELXX
370 XM(J+1) = XM(J) + DELX
FYPR = 1.0/SQRT(1.0+YPRIME**2)
XS(IBL,J) = (XM(J)-THICK2(J)*YPRIME*FYPR+YZERO)*FCSLMN
YS(IBL,J) = (YM(J)+THICK2(J)*FYPR)*FCSLMN
XP(IBL,J) = (XM(J)+THICK2(J)*YPRIME*FYPR+YZERO)*FCSLMN
YP(IBL,J) = (YM(J)-THICK2(J)*FYPR)*FCSLMN
AM(J) = ATAN(YPRIME)*C1
XXM(J) = XM(J)
IF(J .EQ. N) STAGER = ATAN(YM(N)/XM(N))*C1
IF(J .EQ. N) STAG(IBL) = STAGER
XM(J) = (XM(J)+YZERO)*FCSLMN
YM(J) = YM(J)*FCSLMN
THICK2(J) = THICK2(J)*FCSLMN
380 S(J) = S(J)*FCSLMN
IF (ISPLIT .EQ. 0) GO TO 530
XSPLTM(1) = 1. - PERSPJ
K1 = 25
XSPLTM(K1) = 1.
K11 = K1 - 1
DELXX = PERSPJ/FLOAT(K11)
DO 390 J = 2,K11
390 XSPLTM(J) = XSPLTM(J-1) + DELXX
CALL ALG15 (XM,YM,N,XSPLTM,YSPLTM,K1,1)
YLE = YSPLTM(1)
CALL ALG15 (XM,S,N,XSPLTM,SSPLTM,K1,1)
CALL ALG15 (XM,AM,N,XSPLTM,SS1(1,3),K1,1)
SSPLS = SSPLTM(1)
DO 400 J = 1,K1
400 SSPLTM(J) = SSPLTM(J) - SSPLS
GO TO (410,420), ISPLIT
410 XNORMS = SQRT((XSPLTM(K1)-XSPLTM(1))**2+(YSPLTM(K1)-YSPLTM(1))**2)
CHORDS = XNORMS/(1.-YZEROS+XNORMS*(YZEROS+ABS(YONES*SIN(BETA2/
1 C1))))
FCSLMS = (PERSPJ-CHORDS*(YZEROS+ABS(YONES*SIN(BETA2/C1))))/PERSPJ
YZEROS = YZEROS*CHORDS/FCSLMS
YONES = YONES *CHORDS/FCSLMS
TS = TS*CHORDS/FCSLMS
AT = (YZEROS-TS/2.)/(2.*ZSPMXT**3)
CT = (TS/2.-YZEROS)*3./(2.*ZSPMXT)
DT = YZEROS
ET = (YONES-TS/2.)/(1.-ZSPMXT)**3-1.5*(YZEROS-TS/2.)/
1 (ZSPMXT**2*(1.-ZSPMXT))
FT = 1.5*(YZEROS-TS/2.)/ZSPMXT**2
HT = TS/2.
GO TO 450
420 YZS = YZEROS
TS1 = TS
BETA1 = SS1(1,3)
Y1 =-COS(BETA1/C1)/(SIN(BETA1/C1)-SIN(BETA2/C1))
X1 = SIN(BETA1/C1)/(SIN(BETA1/C1)-SIN(BETA2/C1))
RDIUS = ABS(1./(SIN(BETA1/C1)-SIN(BETA2/C1)))
Y2 = TAN((BETA1+BETA2)/(2.*C1))
XMLCS = SQRT(1.+Y2**2)
CHORDS = XMLCS/(1.0-2.*YZEROS*(1.0-XMLCS))
FCSLMS = 1.0-CHORDS*2.*YZEROS
YZEROS = YZEROS*CHORDS/FCSLMS
TS = TS*CHORDS/FCSLMS
SS1(1,1) = 0.
DELX = 1./(XN-1.)
T2 = TS/2.
TPRIM2= T2-YZEROS
C2 = 2.*C1
AFORM = (TPRIM2+RDIUS*(1.-COS((BETA1-BETA2)/C2)))/XMLCS*2.
PHIS = ACOS((1.-AFORM**2)/(1.+AFORM**2))
RS = YZEROS + XMLCS/2./SIN(PHIS)
YSS = RDIUS - RS + T2
BFORM = (RDIUS*(1.-COS((BETA1-BETA2)/C2))-TPRIM2)/XMLCS*2.
PHIP = ACOS((1.-BFORM**2)/(1.+BFORM**2))
RP = XMLCS/2./SIN(PHIP)-YZEROS
YPP = RDIUS - RP - T2
XX = 0.
DO 430 J = 2,N
XX = XX + DELX
PHI1 = ATAN(-1./SQRT(RDIUS**2-(XX-X1)**2)*(XX-X1))
IF (BETA1 .LT. 0.) PHI1 = -PHI1
PHI2 = ABS(BETA1/C1-PHI1)
430 SS1(J,1) = RDIUS*PHI2
DO 440 J = 1,N
SS1(J,1) = SS1(J,1)/SS1(N,1)
PHIX = (SS1(J,1)-.5)*PHI2
440 SS1(J,2) =(YSS*COS(PHIX)+SQRT(RS**2-YSS**2*SIN(PHIX)**2)-RDIUS)/T2
CALL ALG14 (XSPLTM,YSPLTM,K1,XSPLTM,XDUM,SS1(1,3),K1,1)
XNORMS = SQRT(PERSPJ**2+(YSPLTM(K1)-YSPLTM(1))**2)
CHORDS = XNORMS/(1.-2.*YZS*(1.-XNORMS))
FCSLMS = (PERSPJ-CHORDS*2.*YZS)/PERSPJ
TS = TS1*CHORDS/FCSLMS
YZEROS = YZS*CHORDS/FCSLMS
450 DO 500 J = 1,K1
SN = SSPLTM(J)/SSPLTM(K1)
IF (ISPLIT .GT. 1) GO TO 480
IF (SN .GT. ZSPMXT) GO TO 460
THICK(J) = (AT*SN**2+CT)*SN + DT
GO TO 470
460 SN = SN - ZSPMXT
THICK(J) = (ET*SN+FT)*SN**2 + HT
470 FYPR = 1./SQRT(1.+TAN(SS1(J,3)/C1)**2)
YPRIME = TAN(SS1(J,3)/C1)
GO TO 490
480 CALL ALG15 (SS1,SS1(1,2),N,SN,THICK(J),1,1)
THICK(J) = THICK(J)*TS/2.
FYPR = 1.0/SQRT(1.0+SS1(J,3)**2)
YPRIME = SS1(J,3)
490 XSPLTP(J) = (XSPLTM(J)-(1.-PERSPJ)+THICK(J)*YPRIME*FYPR+YZEROS)*
1 FCSLMS+(1.-PERSPJ)
XSPLTS(J) = (XSPLTM(J)-(1.-PERSPJ)-THICK(J)*YPRIME*FYPR+YZEROS)*
1 FCSLMS+(1.-PERSPJ)
YSPLTP(J) = (YSPLTM(J)-YLE-THICK(J)*FYPR)*FCSLMS+YLE
YSPLTS(J) = (YSPLTM(J)-YLE+THICK(J)*FYPR)*FCSLMS+YLE
XSPLTM(J) = (XSPLTM(J)-(1.-PERSPJ)+YZEROS)*FCSLMS+(1.-PERSPJ)
YSPLTM(J) = (YSPLTM(J)-YLE)*FCSLMS+YLE
THICK(J) = THICK(J)*FCSLMS
500 SSPLTM(J) = SSPLTM(J)*FCSLMS
IF (ISPLIT .GT. 1) SS1(1,3) = ATAN(SS1(1,3))*C1
YZEROS = YZEROS*FCSLMS
AREAS = PI/2.*YZEROS**2
AREA2 = AREAS
YINT =-4./(3.*PI)*YZEROS*AREAS*SIN(SS1(1,3)/C1)
XINT = YZEROS*(1.-COS(SS1(1,3)/C1)*4./(3.*PI))*AREAS
DO 510 J = 2,K1
DELA = (THICK(J)+THICK(J-1))*(SSPLTM(J)-SSPLTM(J-1))
AREAS = AREAS + DELA
XINT = XINT + DELA*(XSPLTM(J)+XSPLTM(J-1))/2.
510 YINT = YINT + DELA*(YSPLTM(J)+YSPLTM(J-1))/2.
IF (ISPLIT .LT. 2) GO TO 520
XINT = XINT + AREA2*(XSPLTM(K1)+4.*YZEROS/(3.*PI)*COS(BETA2/C1))
YINT = YINT + AREA2*(YSPLTM(K1)+4.*YZEROS/(3.*PI)*SIN(BETA2/C1))
AREAS = AREAS + AREA2
520 XBARS = XINT/AREAS
YBARS = YINT/AREAS
530 CONTINUE
YZERO = YZERO*FCSLMN
IF (INAST .EQ. 0) GO TO 550
NASNUM = IRTE - IRLE + 1
CALL ALG15 (X,SS,100,XHERE(IRLE),SNADUM(IRLE),NASNUM,1)
SNDUM1 = SNADUM(IRLE)
SNDUM2 = SNADUM(IRTE)
DO 540 J = IRLE,IRTE
SNADUM(J) = (SNADUM(J)-SNDUM1)/(SNDUM2-SNDUM1)
CALL ALG15 (XXM,THICK2,N,SNADUM(J),THARR(IBL,J),1,1)
540 THARR(IBL,J) = THARR(IBL,J)*2.*AXIALC
550 CONTINUE
AREA = PI/2.0*YZERO**2
XINT = YZERO*(1.0-COS(BETA1/C1)*4.0/(3.0*PI))*AREA
YINT =-4.0/(3.0*PI)*YZERO*AREA*SIN(BETA1/C1)
DO 560 J = 2,N
DELA = (THICK2(J)+THICK2(J-1))*(S(J)-S(J-1))
AREA = AREA + DELA
XINT = XINT + DELA*(XM(J)+XM(J-1))/2.0
560 YINT = YINT + DELA*(YM(J)+YM(J-1))/2.0
IF (ISECN .NE. 2) GO TO 570
AREA2= PI/2.*YZERO**2
XINT = XINT + AREA2*(XM(N)+4.*YZERO/(3.*PI)*COS(BETA2/C1))
YINT = YINT + AREA2*(YM(N)+4.*YZERO/(3.*PI)*SIN(BETA2/C1))
AREA = AREA + AREA2
570 XBAR = XINT/AREA
YBAR = YINT/AREA
XBARB= XBAR
YBARB= YBAR
YBAR = YBAR + YDEL/AXIALC
XBAR = XBAR + XDEL/AXIALC
AX = 1./99.
DX(1)= 0.
DO 580 IK = 2,100
580 DX(IK) = DX(IK-1) + AX
YMM = 0.0
XMM = 0.0
DO 660 IK = 1,100
XAB = DX(IK)
IF (ISECN .EQ. 0) GO TO 590
IF (ISECN .EQ. 1) GO TO 600
IF (ISECN .EQ. 2) GO TO 640
IF (ISECN .EQ. 3) GO TO 620
590 Y(IK) = (OA48*(XAB-H)**4+XAB**2*XK2+B*XAB+C)*FCSLMN
SS1(IK,1) = OA/12.*(XAB-H)**3+XK2*2.*XAB+B
GO TO 660
600 XD = XAB - SQ
IF (XD .GT. 0.) GO TO 610
Y(IK) = F3(A1,B1,CC1,E1)*FCSLMN
SS1(IK,1) = F5(A1,B1,CC1)
GO TO 660
610 Y(IK) = F3(A2,B2,CC2,D2)*FCSLMN
SS1(IK,1) = F5(A2,B2,CC2)
GO TO 660
620 IF (XAB-SQ.GT.0.0 .OR. XAB.EQ.0.0 .AND. SQ.EQ.0.0) GO TO 630
IF (BETA1 .EQ. BETA3) GO TO 650
RDIUS = RDIUS1
X1 = X11
Y1 = Y11
BTA1 = BETA1
BTA2 = BETA3
GO TO 640
630 IF (BETA2 .EQ. BETA3) GO TO 650
RDIUS = RDIUS2
X1 = X12
Y1 = Y12
BTA1 = BETA3
BTA2 = BETA2
640 Y(IK) = F6(XAB)*FCSLMN
SS1(IK,1) = F8(XAB)
IF (BTA1-BTA2 .LT. 0.0) SS1(IK,1) = -SS1(IK,1)
IF (BTA1-BTA2 .LT. 0.0) Y(IK) = F7(XAB)*FCSLMN
GO TO 660
650 SS1(IK,1) = TAN(BETA3/C1)
IF (IK .NE. 1) YMM = Y(IK-1)/FCSLMN
IF (IK .NE. 1) XMM = DX(IK-1)
Y(IK) = (SS1(IK,1)*(XAB-XMM)+YMM)*FCSLMN
660 SIGMA(IK) = DX(IK)*FCSLMN + YZERO
CALL ALG15 (SIGMA,Y,100,DX,DY,100,1)
CALL ALG15 (SIGMA,SS1(1,1),100,DX,Y,100,1)
CALL ALG15 (DX,DY,100,XBAR,XAB,1,1)
CALL ALG15 (DX,Y,100,XBAR,XBC,1,1)
XBAR = XBARB
YBAR = YBARB
IX = 0.0
IY = 0.0
IXY = 0.0
DO 670 J = 2,N
DELA = (THICK2(J)+THICK2(J-1))*(S(J)-S(J-1))
IXD = (THICK2(J)+THICK2(J-1))**3*(S(J)-S(J-1))/12.0
IYD = (THICK2(J)+THICK2(J-1))*(S(J)-S(J-1))**3/12.0
COSANG = COS((AM(J)+AM(J-1))/C1)
IXN = (IXD+IYD+(IXD-IYD)*COSANG)/2.0
IYN = (IXD+IYD-(IXD-IYD)*COSANG)/2.0
IXYN = 0.0
IF (AM(J)+AM(J-1) .NE. 0.0) IXYN = ((IXN-IYN)*COSANG-IXD+IYD)/
1 (2.0*SIN((AM(J)+AM(J-1))/C1))
IX = IX + IXN + DELA*((YM(J)+YM(J-1))/2.0-YBAR)**2
IY = IY + IYN + DELA*((XM(J)+XM(J-1))/2.0-XBAR)**2
670 IXY = IXY+ IXYN+ DELA*(YBAR-(YM(J)+YM(J-1))/2.0)*(XBAR-(XM(J)+
1 XM(J-1))/2.0)
ANG = ATAN(2.0*IXY/(IY-IX))
IPX = (IX+IY)/2.0+(IX-IY)/2.0*COS(ANG)-IXY*SIN(ANG)
IPY = (IX+IY)/2.0-(IX-IY)/2.0*COS(ANG)+IXY*SIN(ANG)
ANG = ANG/2.0*C1
XML = XM(N)
YML = YM(N)
CAMBER = BETA1 - BETA2
IF (IPRINT .GE. 2) GO TO 790
LNCT = 47
IF (ISECN.EQ.1 .OR. ISECN.EQ.3) LNCT = 49
WRITE (LOG2,680) CHORD,STAGER,CAMBER,AREA,XBAR,YBAR,IX,IY,IXY,ANG,
1 IPX,ANG,IPY,ANG
680 FORMAT ( /16X,100HNORMALISED RESULTS - ALL THE FOLLOWING REFER TO
1ABLADE HAVING A MERIDIONAL CHORD PROJECTION OF UNITY, /16X,100(1H*
2),//20X,11HBLADE CHORD,4X,1H=,F7.4, //20X,16HSTAGGER ANGLE =,F7.3
3, //20X,16HCAMBER ANGLE =,F7.3, //20X,16HSECTION AREA =,F7.5,
4//20X,45HLOCATION OF CENTROID RELATIVE TO LEADING EDGE, //30X,6HXB
5AR =,F8.5, /30X,6HYBAR =,F8.5, //20X,37HSECOND MOMENTS OF AREA ABO
6UT CENTROID, //30X,6HIX =,F8.5, /30X,6HIY =,F8.5, /30X,6HIXY
7=,F8.5, //20X,58HANGLE OF INCLINATION OF (ONE) PRINCIPAL AXIS TO
8X AXIS =,F7.3, //20X,47HPRINCIPAL SECOND MOMENTS OF AREA ABOUT CE
9NTROID, //30X,6HIPX =,F7.5,6X,3H(AT,F7.3,15H WITH X AXIS), /30X
$,6HIPY =,F7.5,6X,3H(AT,F7.3,15H WITH Y AXIS), //)
690 FORMAT (27X,5HPOINT,8X,24HM E A N L I N E D A T A,13X,23HSURFACE
1COORDINATE DATA, /27X,6HNUMBER,5X,1HX,7X,1HY,5X,15HANGLE THICKNESS
2,9X,2HX1,6X,2HY1,6X,2HX2,6X,2HY2, //)
WRITE (LOG2,690)
DO 710 J = 1,N
IF (LNCT .NE. 60) GO TO 700
WRITE (LOG2,10)
WRITE (LOG2,690)
LNCT = 4
700 LNCT = LNCT + 1
TM = THICK2(J)*2.0
710 WRITE (LOG2,720) J,XM(J),YM(J),AM(J),TM,XS(IBL,J),YS(IBL,J),
1 XP(IBL,J),YP(IBL,J)
720 FORMAT (27X,I3,F13.5,F8.5,F7.3,F8.5,F16.5,3F8.5)
IF (ISPLIT .EQ. 0) GO TO 760
IF (LNCT .LE. 40) GO TO 730
WRITE (LOG2,10)
LNCT = 1
730 WRITE (LOG2,740)
740 FORMAT (//10X,20HSPLITTER COORDINATES, /10X,21(1H*), //2X)
WRITE (LOG2,690)
LNCT = LNCT + 11
N = K1
DO 750 J = 1,N
TM = THICK(J)*2.
XS(IBL,J) = XSPLTS(J)
XP(IBL,J) = XSPLTP(J)
YP(IBL,J) = YSPLTP(J)
YS(IBL,J) = YSPLTS(J)
WRITE (LOG2,720) J,XSPLTM(J),YSPLTM(J),SS1(J,3),TM,XS(IBL,J),
1 YS(IBL,J),XP(IBL,J),YP(IBL,J)
LNCT = LNCT + 1
IF (LNCT .LE. 60) GO TO 750
WRITE (LOG2,10)
WRITE (LOG2,690)
LNCT = 4
750 CONTINUE
760 CONTINUE
DO 770 J = 1,N
XM(J) = XS(IBL,J)
YM(J) = YS(IBL,J)
AM(J) = XP(IBL,J)
770 THICK2(J) = YP(IBL,J)
WRITE (LOG2,780) IBL
780 FORMAT (1H1,45X,33HNORMALISED PLOT OF SECTION NUMBER,I3, /2X)
CALL ALG16 (N,LOG2,XM,YM,AM,THICK2)
790 A2 = AXIALC**2
A4 = A2**2
IX = IX*A4
IY = IY*A4
IXY = IXY*A4
IPX = IPX*A4
IPY = IPY*A4
IF (ISTAK .GT. 1) GO TO 800
XBAR= ISTAK
IF (ISTAK .EQ. 0) YBAR = 0.
IF (ISTAK .EQ. 1) YBAR = YML
800 RLE = YZERO*AXIALC
IF (ISPLIT .NE. 0) GO TO 810
CHORD = CHORD*AXIALC
CCORD(IBL) = CHORD
AREA = AREA*A2
XC = RLE - XBAR*AXIALC - XDEL
YC =-YBAR*AXIALC - YDEL
XTC = (XML-XBAR)*AXIALC - XDEL
YTC = (YML-YBAR)*AXIALC - YDEL
GO TO 860
810 RLE = YZEROS*AXIALC
CHORD = CHORDS*AXIALC
AREAS = AREAS*AXIALC**2
XC = (XSPLTM(1)-XBAR)*AXIALC - XDEL
YC = (YSPLTM(1)-YBAR)*AXIALC - YDEL
XTC = (XSPLTM(K1)-XBAR)*AXIALC - XDEL
YTC = (YSPLTM(K1)-YBAR)*AXIALC - YDEL
XBARS = (XBARS-XBAR)*AXIALC - XDEL
YBARS = (YBARS-YBAR)*AXIALC - YDEL
IF (IPRINT .GE. 2) GO TO 940
GO TO (820,840), ISPLIT
820 WRITE (LOG2,830) CHORD,RLE,XC,YC,XBARS,YBARS,AREAS
830 FORMAT (1H1,31X,69HDIMENSIONAL RESULTS - ALL RESULTS REFER TO A BL
1ADE OF SPECIFIED CHORD, /32X,69(1H*), //20X,11HBLADE CHORD,4X,1H=,
21P,E12.5,//20X,10HEND RADIUS,5X,1H=,1P,E12.5,8X,14HCENTERED AT X=,
31P,E12.5,3H Y=,1P,E13.5, //20X,26HLOCATION OF CENTROID AT X=,
41P,E12.5,7H AND Y=,1P,E12.5, //20X,16HSECTION AREA =,1P,E12.5,
5 //2X)
GO TO 900
840 WRITE (LOG2,850) CHORD,RLE,XC,YC,XTC,YTC,XBARS,YBARS,AREAS
850 FORMAT (1H1,31X,69HDIMENSIONAL RESULTS - ALL RESULTS REFER TO A BL
1ADE OF SPECIFIED CHORD, /32X,69(1H*), //20X,11HBLADE CHORD,4X,1H=,
21P,E12.5,//20X,10HEND RADIUS,5X,1H=,1P,E12.5,8X,14HCENTERED AT X=,
31P,E12.5,3H Y=,1P,E13.5, /64X,6HAND X=,1P,E12.5,3H Y=,1P,E13.5,
4 /20X,26HLOCATION OF CENTROID AT X=,1P,E12.5,7H AND Y=,1P,E12.5,
5 //20X,16HSECTION AREA =,1P,E12.5, //2X)
GO TO 900
860 CONTINUE
IF (IPRINT .GE. 2) GO TO 940
IF (ISECN .EQ. 2) GO TO 880
WRITE (LOG2,870) CHORD,RLE,XC,YC,AREA,IX,IY,IXY,IPX,ANG,IPY,ANG
870 FORMAT (1H1,31X,69HDIMENSIONAL RESULTS - ALL RESULTS REFER TO A BL
1ADE OF SPECIFIED CHORD, /32X,69(1H*),//20X,11HBLADE CHORD,4X,1H=,
31P,E12.5,//20X,10HL.E.RADIUS,5X,1H=,1P,E12.5,8X,14HCENTERED AT X=,
41P,E13.5,3H Y=,1P,E13.5, //20X,16HSECTION AREA =,1P,E12.5,//20X,
537HSECOND MOMENTS OF AREA ABOUT CENTROID, //30X,6HIX =,1P,E12.5,
6 /30X,6HIY =,1P,E12.5, /30X,6HIXY =,1P,E12.5, //20X,47HPRINCIPA
7L SECOND MOMENTS OF AREA ABOUT CENTROID, //30X,6HIPX =,1P,E12.5,
85H (AT,0P,F7.3,15H WITH X AXIS), /30X,6HIPY =,1P,E12.5,
95H (AT,0P,F7.3,15H WITH Y AXIS), //)
GO TO 910
880 CONTINUE
WRITE (LOG2,890) CHORD,RLE,XC,YC,XTC,YTC,AREA,IX,IY,IXY,IPX,ANG,
1 IPY,ANG
890 FORMAT (1H1,31X,69HDIMENSIONAL RESULTS - ALL RESULTS REFER TO A BL
1ADE OF SPECIFIED CHORD, /32X,69(1H*),//20X,11HBLADE CHORD,4X,1H=,
21P,E12.5, //20X,9HEND RADII,6X,1H=,1P,E12.5,8X,14HCENTERED AT X=,
31P,E13.5,3H Y=,1P,E13.5, /64X,6HAND X=,1P,E13.5,3H Y=,1P,E13.5,
4 /20X,16HSECTION AREA =,1P,E12.5, //20X,37HSECOND MOMENTS OF ARE
5A ABOUT CENTROID, //30X,6HIX =,1P,E12.5, /30X,6HIY =,1P,E12.5,
6 /30X,6HIXY =,1P,E12.5, //20X,47HPRINCIPAL SECOND MOMENTS OF AREA
7 ABOUT CENTROID, //30X,6HIPX =,1P,E12.5,5H (AT,0P,F7.3,
815H WITH X AXIS), /30X,6HIPY =,1P,E12.5,5H (AT,0P,F7.3,
915H WITH Y AXIS), //)
900 CONTINUE
910 WRITE (LOG2,920)
WRITE (LOG2,930)
920 FORMAT(4X,2HPT,5X,7HSURFACE,10(1H-),3HONE,8X,7HSURFACE,10(1H-),3HT
1WO,10X,2HPT,5X,7HSURFACE,10(1H-),3HONE,8X,7HSURFACE,10(1H-),3HTWO)
930 FORMAT (4X,2HNO,8X,1HX,13X,1HY,13X,1HX,13X,1HY,12X,2HNO,8X,1HX,13X
1,1HY,13X,1HX,13X,1HY, //)
LNCT = 24
940 DO 970 J = 1,N
XS(IBL,J) = (XS(IBL,J) - XBAR)*AXIALC - XDEL
YS(IBL,J) = (YS(IBL,J) - YBAR)*AXIALC - YDEL
XP(IBL,J) = (XP(IBL,J) - XBAR)*AXIALC - XDEL
YP(IBL,J) = (YP(IBL,J) - YBAR)*AXIALC - YDEL
IF (IPRINT .GE. 2) GO TO 970
IF ((J/2)*2 .NE. J) GO TO 970
IF (LNCT .NE. 60) GO TO 950
LNCT = 4
WRITE (LOG2,10)
WRITE (LOG2,920)
WRITE (LOG2,930)
950 LNCT = LNCT + 1
JM1 = J - 1
WRITE (LOG2,960) JM1,XS(IBL,JM1),YS(IBL,JM1),XP(IBL,JM1),
1 YP(IBL,JM1),J,XS(IBL,J),YS(IBL,J),XP(IBL,J),
2 YP(IBL,J)
960 FORMAT (3X,I3,4(2X,1P,E12.5),6X,I3,4(2X,1P,E12.5))
970 CONTINUE
CHORDD(IBL) = CHORD
IF (ISPLIT .GT. 1) ISECN = ISPLIT
IF (IPRINT .GE. 2) GO TO 1000
IF (LNCT .GT. 24) WRITE (LOG2,980)
980 FORMAT (1H1)
IF (LNCT .GT. 24) LNCT = 2
LNCT = LNCT + 5
IF (ISECN .EQ. 2) GO TO 1030
WRITE (LOG2,990)
990 FORMAT (//48X,37HPOINTS DESCRIBING LEADING EDGE RADIUS, //48X,
1 9HPOINT NO.,6X,1HX,13X,1HY, /2X)
1000 EPS = BETA1 + 180.0
IF (ISECN .EQ. 2) GO TO 1030
DO 1020 J = 1,31
XSEMI(IBL,J) = XC - RLE*SIN(EPS/C1)
YSEMI(IBL,J) = YC + RLE*COS(EPS/C1)
EPS = EPS - 6.0
IF (IPRINT .GE. 2) GO TO 1020
WRITE (LOG2,1010) J,XSEMI(IBL,J),YSEMI(IBL,J)
LNCT = LNCT + 1
1010 FORMAT (48X,I5,1P,E17.5,1P,E14.5)
1020 CONTINUE
GO TO 1090
1030 PHISS = PHIS - ABS((BETA1-BETA2)/C2)
PHIPP = ABS((BETA1-BETA2))/C2 - PHIP
EPS = BETA1 + 180.0
EPS2 = BETA2 + 90.
DELEP = (180.-(PHISS+PHIPP)*C1)/28.
DO 1060 J = 1,31
IF (J .NE. 1) GO TO 1040
XSEMI(IBL,J) = XP(IBL,1)
YSEMI(IBL,J) = YP(IBL,1)
XSEMJ(IBL,J) = XS(IBL,N)
YSEMJ(IBL,J) = YS(IBL,N)
EPS = EPS - PHIPP*C1
EPS2 = EPS2 - PHISS*C1
GO TO 1060
1040 IF (J .NE. 31) GO TO 1050
XSEMI(IBL,J) = XS(IBL,1)
YSEMI(IBL,J) = YS(IBL,1)
YSEMJ(IBL,J) = YP(IBL,N)
XSEMJ(IBL,J) = XP(IBL,N)
GO TO 1060
1050 XSEMI(IBL,J) = XC - RLE*SIN(EPS/C1)
YSEMI(IBL,J) = YC + RLE*COS(EPS/C1)
XSEMJ(IBL,J) = XTC + RLE*COS(EPS2/C1)
YSEMJ(IBL,J) = YTC + RLE*SIN(EPS2/C1)
EPS = EPS - DELEP
EPS2 = EPS2 - DELEP
1060 CONTINUE
IF (IPRINT .GE. 2) GO TO 1090
WRITE (LOG2,1070)
1070 FORMAT (//39X,44HPOINTS DESCRIBING LEADING AND TRAILING EDGES,
1 /25X,12HLEADING EDGE,22X,13HTRAILING EDGE, /2X,9HPOINT NO.,4X,8X,
2 1HX,14X,1HY,12X,8X,1HX,14X,1HY, /2X)
WRITE (LOG2,1080) (J,XSEMI(IBL,J),YSEMI(IBL,J),XSEMJ(IBL,J),
1 YSEMJ(IBL,J),J=1,31)
LNCT = LNCT + 31
1080 FORMAT (6X,I2,7X,1P,E17.5,1P,E14.5,2X,1P,E17.5,1P,E14.5)
1090 SSURF = AXIALC
SS2 = BX - AXIALC*XBAR - XDEL
SBAR = SS2 + AXIALC*XBARB + XDEL
DO 1100 IK = 1,100
1100 SS(IK) = SS(IK) - SBAR
CALL ALG15 (SS,X,100,0.0,SBAR,1,1)
CALL ALG15 (XHERE,R(1,IBL),NSTNS,SBAR,RXBAR,1,0)
XBARC = XBAR
YBARC = YBAR
XBAR = XBARB + XDEL/AXIALC
YBAR = YBARB + YDEL/AXIALC
SS1(1,1) = SS(1)
S23 = AXIALC/99.
SS(1) = SS(1) + SS2
DO 1110 IK = 2,100
SS1(IK,1) = SS(IK)
1110 SS(IK) = SS(IK-1) + S23
SIGMAO = (XAB-YBAR)/RXBAR*AXIALC
DO 1120 IK = 2,100
IF (XBAR .EQ. DX(IK)) GO TO 1140
IF (XBAR.GT.DX(IK-1) .AND. XBAR.LT.DX(IK)) GO TO 1150
1120 CONTINUE
WRITE (LOG2,1130)
1130 FORMAT (1H1,23H XBAR CANNOT BE LOCATED)
1140 SIGMA(IK) = SIGMAO
KL = IK + 1
GO TO 1160
1150 KL = IK
SIGMA(IK-1) = SIGMAO
1160 SSDUM = SS(KL-1)
SS(KL-1) = 0.
YP1 = XBC
RX1 = RXBAR
DO 1170 IK = KL,100
XSURF = SS2 + DX(IK)*SSURF + SS1(1,1)
CALL ALG15 (SS1(1,1),X,100,XSURF,XDUM,1,1)
CALL ALG15 (XHERE,R(1,IBL),NSTNS,XDUM,RX2,1,0)
SIGMA(IK) = SIGMA(IK-1) + (Y(IK)/RX2+YP1/RX1)/2.*(SS(IK)-SS(IK-1))
YP1 = Y(IK)
1170 RX1 = RX2
SS(KL-1) = SSDUM
SSDUM = SS(KL)
SIGDUM = SIGMA(KL)
SIGMA(KL) = SIGMAO
SS(KL) = 0.
RX1 = RXBAR
YP1 = XBC
KM = KL - 1
DO 1180 IK = 1,KM
KJ = KL - IK
XSURF = SS2 + DX(KJ)*SSURF + SS1(1,1)
CALL ALG15 (SS1(1,1),X,100,XSURF,XDUM,1,1)
CALL ALG15 (XHERE,R(1,IBL),NSTNS,XDUM,RX2,1,0)
SIGMA(KJ) = SIGMA(KJ+1)-(Y(KJ)/RX2+YP1/RX1)/2.*(SS(KJ+1)-SS(KJ))
YP1 = Y(KJ)
1180 RX1 = RX2
SIGMA(KL) = SIGDUM
SS(KL) = SSDUM
DO 1190 IK = 1,100
1190 SS(IK) = SS1(IK,1)
XBAR = XBARC
YBAR = YBARC
DO 1200 IK = 1,N
SS1(IK,1) = SS2 + ((XS(IBL,IK)+XDEL)/AXIALC+XBAR)*SSURF+SS(1)
1200 SS1(IK,2) = SS2 + ((XP(IBL,IK)+XDEL)/AXIALC+XBAR)*SSURF+SS(1)
DO 1210 IK =1,31
1210 SS1(IK,3) = SS2 + ((XSEMI(IBL,IK)+XDEL)/AXIALC+XBAR)*SSURF+SS(1)
IF (ISECN .NE. 2) GO TO 1230
DO 1220 IK = 1,31
1220 SS1(IK,4) = SS2 + ((XSEMJ(IBL,IK)+XDEL)/AXIALC+XBAR)*SSURF+SS(1)
CALL ALG15 (SS,X,100,SS1(1,4),SS1(1,4),31,1)
1230 CALL ALG15 (SS,X,100,SS1(1,1),SS1(1,1),N,1)
CALL ALG15 (SS,X,100,SS1(1,2),SS1(1,2),N,1)
CALL ALG15 (SS,X,100,SS1(1,3),SS1(1,3),31,1)
IF (ISTAK .GT. 1) GO TO 1250
IF (ISTAK .EQ. 1) SIGMAO = SIGMA(100)
IF (ISTAK .EQ. 0) SIGMAO = SIGMA(1)
DO 1240 IK = 1,100
1240 SIGMA(IK) = SIGMA(IK) - SIGMAO
1250 DO 1260 IK = 1,100
DX(IK) = (DX(IK)-XBAR)*AXIALC - XDEL
1260 DY(IK) = (DY(IK)-YBAR)*AXIALC - YDEL
DO 1280 MK = 1,4
IF (ISECN.NE.2 .AND. MK.EQ.4) GO TO 1280
IF (MK.EQ.4 .OR. MK.EQ.3) NNN = 31
IF (MK.EQ.1 .OR. MK.EQ.2) NNN = N
DO 1270 IK = 1,NNN
IF (MK .EQ. 1) YP1 = YS(IBL,IK)
IF (MK .EQ. 2) YP1 = YP(IBL,IK)
IF (MK .EQ. 3) YP1 = YSEMI(IBL,IK)
IF (MK .EQ. 4) YP1 = YSEMJ(IBL,IK)
IF (MK .EQ. 1) RX1 = XS(IBL,IK)
IF (MK .EQ. 2) RX1 = XP(IBL,IK)
IF (MK .EQ. 3) RX1 = XSEMI(IBL,IK)
IF (MK .EQ. 4) RX1 = XSEMJ(IBL,IK)
CALL ALG15 (DX,DY,100,RX1,RXBAR,1,1)
DELLY = YP1 - RXBAR
CALL ALG15 (XHERE,R(1,IBL),NSTNS,SS1(IK,MK),RAB,1,0)
DELSIG = DELLY/RAB
CALL ALG15 (DX,SIGMA,100,RX1,XAB,1,1)
1270 SS1(IK,MK) = XAB + DELSIG
1280 CONTINUE
RETURN
C
1290 WRITE (LOG2,1300)
1300 FORMAT (1H1,10X,54HITERATIVE SOLUTION FOR CONSTANT FAILS - CASE AB
1ANDONED)
CALL MESAGE (-37,0,NAME)
END
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