FAQ Structural Mechanics – Imported

FAQ Structural Mechanics – Imported

I am writing an ACT extension to encapsulate a custom result and need to take the derivative of that

    • Vishal Ganore
      Ansys Employee
      There are two main options here: Create the derivative yourself in Python, or call out to APDL to invoke the DERIV command. If creating the derivative yourself, it will require some numerical programming as (unfortunately) ACT's Python does not have access to SciPy. If calling APDL, note that ansys.RunANSYS() might not won't work in an Evaluate or Generate callback due to a threading issue. It probably will, but if not, here is how to do it without "import ansys" capabilities: --------------- import Ansys.Utilities from Ansys.Utilities import ApplicationConfiguration import System from System.Diagnostics import Process from System.Diagnostics import ProcessStartInfo from System.Diagnostics import ProcessWindowStyle # Create a tmp bat file in this path bat_file = System.IO.Path.Combine(apdlDir,'tmp.bat'); info = System.IO.StreamWriter(bat_file) a = ApplicationConfiguration.DefaultConfiguration.AwpRootEnvironmentVariableValue b = System.IO.Path.Combine(a,'ansys') c = System.IO.Path.Combine(b,'bin') d = System.IO.Path.Combine(c,ApplicationConfiguration.DefaultConfiguration.AnsysPlatform) e = System.IO.Path.Combine(d,'ansys162.exe') commandLine = '"'+e+'" -dir "'+apdlDir+'" -j "file" -b -i "'+apdlInput+'" -o "'+apdlOutput+'"' info.WriteLine(commandLine) info.Close() # Run the bat file now startInfo = ProcessStartInfo(bat_file, None) startInfo.WindowStyle = ProcessWindowStyle.Minimized p = Process.Start(startInfo) p.WaitForExit() # Delete the tmp bat file System.IO.File.Delete(bat_file) --------------- In this code, we create a tmp file with the command we want, and execute it with ANSYS. A nice way to get any APDL functionality in your ACT code.
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