May 24, 2023 at 4:54 amWilliam AlloucheSubscriber
I am currently studying the topology optimisation potential on a 3-point bending beam case and I wanted to compare the results between a density-based and a level set based topology optimisation in Structural Optimisation. Density-based optimisation works just fine but when I try to run the level set based optimisation, the solver does not seem to start as I keep getting the following error (taken from the topo.err file):
IDS_LVLS_TOPO_OPTIM_UNKNOWN_ERROR:3: message=DPF error - runtime error: self_call; generalized_inner_product:73<-VolumeForce:72<-Current element is not mapped properly: id=364534 apdl_type=174 n_dofs=3 data_size=192
Could someone help me understand what this error means?
I can provide more details on my model if needed.
Thank you and best regards,
May 25, 2023 at 10:36 amJohn DoyleAnsys Employee
As you know, the Level Set method deals with the boundary of the shapes during the optimization process. Your mesh might be too coarse to satisfy all the compatibility conditions. Have you tried a finer mesh?
May 30, 2023 at 2:10 amWilliam AlloucheSubscriber
Thank you for your reply and sorry to give my own reply only now.
Changing the mesh for a finer one did not solve this particular issue. However, when I modelled my beam, I also modelled the 2 supports and the indenter:
I noticed I was able to run a Level-set based topology optimisation when 1) I created a new file on the Workbench and 2) when there was only body involved in Mechanical (there has to be only one body in Mechanical, no matter the role of the other bodies I want to put in there). The 2nd point seems a bit strange, since I read online that I should have the possibility to run a topology optimisation with multiple optimisation regions and Level-set based topology optimisation.
But when I try to run a simulation with more than one body, let alone one with multiple optimisation regions, I get exactly the same error as the one I copy-pasted in my first message: do you know if that is normal?
- You must be logged in to reply to this topic.
Boost Ansys Fluent Simulations with AWS
Computational Fluid Dynamics (CFD) helps engineers design products in which the flow of fluid components is a significant challenge. These different use cases often require large complex models to solve on a traditional workstation. Click here to join this event to learn how to leverage Ansys Fluids on the cloud, thanks to Ansys Gateway powered by AWS.
Earth Rescue – An Ansys Online Series
The climate crisis is here. But so is the human ingenuity to fight it. Earth Rescue reveals what visionary companies are doing today to engineer radical new ideas in the fight against climate change. Click here to watch the first episode.
Subscribe to the Ansys Blog to get great new content about the power of simulation delivered right to your email on a weekly basis. With content from Ansys experts, partners and customers you will learn about product development advances, thought leadership and trends and tips to better use Ansys tools. Sign up here.
- License Error
- Error with workbench SceneGraphChart
- How can I renew ANSYS student version license?
- Workbench not opening
- Sizing on Ansys Workbench 19.2
- Workbench error
- Error: Exception of type ‘Ansys.Fluent.Cortex.Cortex not availableException’ was thrown
- Ansys2021R2 ansys212 seg faults immediately on RHEL8.2
- Licensing error while opening ANSYS Mechanical
- An error occurred when the post processor attempted to load a specific result.
© 2023 Copyright ANSYS, Inc. All rights reserved.