I encountered a problem remapping the results of a 1D wedge simulation of HE detonation onto a 2D Euler-FCT axial-symmetry part. There were no errors during the remapping process. However upon executing the problem, AUTODYN 2D terminates abruptly with the following error message: “”Negative density or pressure in SETFCT””. Why? “
Tagged: 17, autodyn, Explicit - AUTODYN, General, structural-mechanics
-
-
March 17, 2023 at 9:00 am
FAQ
ParticipantEuler-FCT is a single material processor and only a material with an ideal-gas EOS can be mapped into an Euler-FCT part. If the explosive in the 1D calculation has enough expansion and an ideal-gas EOS has replaced its JWL EOS, the 1D results can be remapped into 2D Euler-FCT without any problem. Otherwise, it will cause a “negative density” error due to the mismatch between air density and the density of material being filled. You can go to the PARTS panel in Autodyn Component System, select the Euler-FCT part, and then click on the SOLVER button to change the processor type from “Euler-FCT” to “Euler-God”, remap the 1D results again, then you should be able to run the 2D problem.
-

Introducing Ansys Electronics Desktop on Ansys Cloud
The Watch & Learn video article provides an overview of cloud computing from Electronics Desktop and details the product licenses and subscriptions to ANSYS Cloud Service that are...

How to Create a Reflector for a Center High-Mounted Stop Lamp (CHMSL)
This video article demonstrates how to create a reflector for a center high-mounted stop lamp. Optical Part design in Ansys SPEOS enables the design and validation of multiple...

Introducing the GEKO Turbulence Model in Ansys Fluent
The GEKO (GEneralized K-Omega) turbulence model offers a flexible, robust, general-purpose approach to RANS turbulence modeling. Introducing 2 videos: Part 1 provides background information on the model and a...

Postprocessing on Ansys EnSight
This video demonstrates exporting data from Fluent in EnSight Case Gold format, and it reviews the basic postprocessing capabilities of EnSight.
- The LS-DYNA equivalent of *MODEL_CHANGE card (in ABAQUS). Which keywords can be used to introduce(activate)/delete(deactivate) elements in the middle of a calculation (at user-specific time/load steps).
- The warning message is: “The maximum contact stiffness is too big. This may affect the accuracy of the results.” Why does large contact stiffness affect results accuracy?
- Contact Definitions in ANSYS Workbench Mechanical
- How to deal with “”Problem terminated — energy error too large””?”
- After Workbench crashes, how can I recover the project from a .mechdb file?
- How to display the color of each body based on the material in Mechanical?
- How to resolve “Error: Invalid Geometry”?
- Model has a large number of contacts – how to reduce them?
- Please explain the difference between Point Mass and Distributed Mass.
- How to locate an element of a particular ID number in Mechanical?
© 2023 Copyright ANSYS, Inc. All rights reserved.