Learning Forum

[sahua1]

Hi,

I'm currently running NVH simulations for an 8-pole PMSM and I have ran many operating points without any issue, but sometimes I get a strange error:

If I open the Load Transfer Summary, the only information I see is the following:

It doesn't indicate what the issue is or how to fix it. Do you know a possible reason for this and how to fix it?

Regards,

Ashish Sahu

 

 

 

[Pedram Samadian]

Hi Ashish,

 

The message points to an issue with how forces are defined or applied in the harmonic response analysis, and I see you have imported the load data into Mechanical. My first guess is there might be an formatting issue within the imported file. Please ensure the file is in a format compatible with Ansys Mechanical. You can find useful information about the data impot into Mechanical in the following link: 5.15.5.2. Importing Data from Mechanical

There might be a few common reasons for this problem in Ansys Mechanical:

- Inconsistent Units or Magnitudes in Force Data: Check the units of the imported data and ensure they match the units in your analysis setup. If force magnitudes or units are inconsistent, it may cause issues in processing.

- Incorrect Load Transfer Option: There might be a conflict with the load transfer option used in the setup. In harmonic response analysis, force-based loads should be correctly defined and applied at each frequency step. Make sure the load transfer method matches the load application type (like point loads, surface pressures, etc.).

- Mesh and Contact Definitions: If the force is applied across a contact interface, verify the contact definitions and mesh refinement at the interface. Problems in contact regions or poor mesh quality can sometimes lead to load application errors.

- Frequency Range or Load Step Issues: Ensure that the frequency range or steps specified are within the valid range of the harmonic response setup. Also, check that the applied force frequencies match those of the analysis.

I hope this information helps you to resolve the issue.

Thanks,

Pedram