Hello,
I have this simple example of a quad with a circular hole:
+PROG AQUA urs:1
NORM DC US NDC AASHTO-2014 COUN US UNIT 0 LANG 1 G 10
STEE NO 8 TYPE S FY 345 TMAX 55 GAM 78.5*1.15 TITL 'A709 GR. 50'
STEE NO 9 TYPE S FY 235 TMAX 55 GAM 78.5*1.15 TITL 'A106 GR. B'
END
+PROG SOFIMSHC urs:2
SYST 3D GDIR POSZ GDIV 100000
CTRL MESH 2+64
CTRL HMIN 0.05
SPT NO 100 SX 1.0
LET#PHI_INT 200
LET#ALPHA 60.0
SLN NO 101
SLNB XM 0.0 ZM 0.0 NX +COS(#ALPHA) NZ -SIN(#ALPHA) R #PHI_INT/2/SIN(#ALPHA)[MM]
SPT NO X Y Z
1 -0.5*SIN(#ALPHA) 0.5 -0.5*COS(#ALPHA)
2 +0.5*SIN(#ALPHA) 0.5 +0.5*COS(#ALPHA)
3 +0.5*SIN(#ALPHA) -0.5 +0.5*COS(#ALPHA)
4 -0.5*SIN(#ALPHA) -0.5 -0.5*COS(#ALPHA)
SAR NO 1 MNO 8 T 10[MM] GRP 11 QREF CENT
SARB NA NE
1 2
2 3
3 4
4 1
SARB TYPE IN NL 101
SLN NO NPA NPE FIX=PP
1 1 2
2 2 3
3 3 4
4 4 1
END
I ended up including a factor of “/SIN(#ALPHA)” in the radius of the SLNB to get the same hole for any “#ALPHA” (angle of the quad). This behaviour seems strange to me. Shouldn’t the hole be of the same radius for any “#ALPHA” without that factor? I’m a bit astonished.
Thanks and regards,
Gonzalo