ANSYS Workbench Sending Commands to Mechanical APDL

apdl_mac

! set parameters
xlen=3
ylen=4
zlen=7

! define model
/prep7
block,,xlen,,ylen,,zlen  
et,1,185
mp,ex,1,1e6
mp,prxy,1,0.3
vmesh,all
nsel,s,loc,z,0
d,all,all
nsel,s,loc,y,ylen
sf,all,pres,125
alls
fini

! obtain the solution
/solution
solve
fini


! retrieve results
/post1
! get the max stress at the fixed end
nsel,s,loc,x,xlen
nsel,r,loc,y,ylen
nsel,r,loc,z,0
*GET,out_my_node_stress,NODE,1,NXTH
*GET,out_seqv,NODE,out_my_node_stress,S,EQV
! get the max displacement at the free end
nsel,s,loc,x,xlen
nsel,r,loc,y,ylen
nsel,r,loc,z,zlen
*GET,out_my_node_def,NODE,1,NXTH
*GET,out_uy,NODE,out_my_node_def,U,Y
alls
fini

workbench_script

# Import the 'os' module, which provides a portable way of using 
# operating system dependent functionality
import os

SetUserPathRoot(DirectoryPath = "E:\workbench-script-demo")

# Specify the Mechanical APDL Input file to be processed
inputFile = AbsUserPathName("bar.apdl")

# Provide a list of bar length (Z) values to solve and write CDB files for.
# Note: We expect '0' to fail.
zValues = [3,5,0,12,15]

# Open a log file to record script progress
logFile = open(AbsUserPathName("bar_script.log"),"w")

# Start a new project and create the Mechanical APDL system
Reset()
template1 = GetTemplate(TemplateName="Mechanical APDL")
system1 = template1.CreateSystem()

# Read the input file into the Mechanical APDL Setup
setup1 = system1.GetContainer(ComponentName="Setup")
mapdlInputFile1 = setup1.AddInputFile(FilePath=inputFile)

# Create Workbench parameters from two of the Mechanical APDL parameters
# in the input file
mapdlInputFile1.PublishMapdlParameter(Name="ZLEN")
parZlen = Parameters.GetParameter(Name="P1")

mapdlInputFile1.PublishMapdlParameter(
    Name="OUT_UY",
    IsDirectOutput=True)
parUY = Parameters.GetParameter(Name="P2")

# Save the initial project definition.
Save(
    FilePath=AbsUserPathName("myBar.wbpj"),
    Overwrite=True)
    
# Loop through all provided bar lengths
for zVal in zValues:
  
    # Set the Z (length) parameter expression
    parZlen.Expression = str(zVal)
    logFile.write("Updating for z = %s\n" % zVal)
    
    # Update the project for the new parameter value, and report 
    # success or failure to the log file.
    try:
        Update()
    except:
        logFile.write("  Update failed.\n")
    else:
        logFile.write("  Update succeeded. UY = %s\n" % parUY.Value)
    
    # Generate the name of the CDB file to save
    cdbName = os.path.join(GetUserFilesDirectory(), "bar_" + str(zVal) + ".cdb")
    cdbNameForCmd = cdbName.replace("\\","/")
    
    # Delete the cdb file if it already exists, to prevent 
    # Mechanical APDL from promting us about overwrite.
    if os.path.exists(cdbName):
        os.remove(cdbName)
    
    # Generate the APDL command to save the CDB file and send it.
    apdlCmd = "cdwr,db,%s" % cdbNameForCmd
    setup1.SendCommand(Command=apdlCmd)
    logFile.write("  CDB written to %s\n\n" % cdbName)

# Save the final project state.
Save()   
logFile.close()

This sample from documentation to Ansys Workbench.
Sample will work if execute them from Workbench coomand prompt only.