7
in cross-section at design grade of 15 percent. There are
two hundred sections in the mesh. Each section contains
4,536 elements. A refined mesh near the ramp walls insures
satisfactory quality of numerical results. A less refined mesh
away from the ramp walls provides economy of computa-
tion. The sections are at 0, 180 and 360 degree azimuths.
Step 3 FEM Execution and Results The runstream
file produced during mesh generation is similar to the
runstream in the previous example. Thus,
Lucky Friday 5100 Hook equiprops 4/26/2023 spiral wgp
F:\Visual Studio 2010\Projects\SPK\GMB3\EQLFM.txt
F:\Visual Studio 2010\Projects\SPK\GMB3\belms
F:\Visual Studio 2010\Projects\SPK\GMB3\bcrds
F:\Visual Studio 2010\Projects\SPK\GMB3\brcte
F:\Visual Studio 2010\Projects\SPK\GMB3\bsigi
F:\Visual Studio 2010\Projects\SPK\GMB3\bnsps
LFMrS
nelem =907200
nnode =945504
nspec =53064
nmat =3
ncut =-1
ninc =5
nisgo =1
inter =200
maxit =4000
nyeld =2
nelcf =14400
nsol =2
nprb =9
mgob =0
error= 1.0000
orf =1.8600
xfac =12.0000
yfac =12.0000
zfac =12.0000
efac =1.0000
cfac =1.0000
tolr% =0.0100
ENDRUN
This analysis required about six hours of runtime and
resulted in 32,327 failed elements, about 3.6 percent of
total elements.
Figure 8 shows the distribution of element safety fac-
tors in several cross sections of the ramp. The distributions
change little with additional depth. Element failures (black)
Safety Factor Color Scale
Figure 8. Element safety factor distributions in cross-sections of a 360 deg spiral ramp at the default ramp radius of 11.25
times opening width
in cross-section at design grade of 15 percent. There are
two hundred sections in the mesh. Each section contains
4,536 elements. A refined mesh near the ramp walls insures
satisfactory quality of numerical results. A less refined mesh
away from the ramp walls provides economy of computa-
tion. The sections are at 0, 180 and 360 degree azimuths.
Step 3 FEM Execution and Results The runstream
file produced during mesh generation is similar to the
runstream in the previous example. Thus,
Lucky Friday 5100 Hook equiprops 4/26/2023 spiral wgp
F:\Visual Studio 2010\Projects\SPK\GMB3\EQLFM.txt
F:\Visual Studio 2010\Projects\SPK\GMB3\belms
F:\Visual Studio 2010\Projects\SPK\GMB3\bcrds
F:\Visual Studio 2010\Projects\SPK\GMB3\brcte
F:\Visual Studio 2010\Projects\SPK\GMB3\bsigi
F:\Visual Studio 2010\Projects\SPK\GMB3\bnsps
LFMrS
nelem =907200
nnode =945504
nspec =53064
nmat =3
ncut =-1
ninc =5
nisgo =1
inter =200
maxit =4000
nyeld =2
nelcf =14400
nsol =2
nprb =9
mgob =0
error= 1.0000
orf =1.8600
xfac =12.0000
yfac =12.0000
zfac =12.0000
efac =1.0000
cfac =1.0000
tolr% =0.0100
ENDRUN
This analysis required about six hours of runtime and
resulted in 32,327 failed elements, about 3.6 percent of
total elements.
Figure 8 shows the distribution of element safety fac-
tors in several cross sections of the ramp. The distributions
change little with additional depth. Element failures (black)
Safety Factor Color Scale
Figure 8. Element safety factor distributions in cross-sections of a 360 deg spiral ramp at the default ramp radius of 11.25
times opening width