Learning Forum

[Mojgan Ghodrati]

I am doing a simulation of permanents cylinder magnets. Magnets are axially magnetized (please look at the attached image). The upper magnets were tilted for 2 degree in X direction (constant tilt). Magnets also rotating around Z-axis to calculate torque. Without tilting the created  torque in only around Z-axis, but with 2° tilting, torque was also created around Y-axis. I am interested to calculated the tilting stiffness (mN.m/degree). Could you please help me how can I calculate the tilting stiffness (mN.m/degree)?  

[Naresh Patre]

Hello Ghodrati

I am not sure if it's possible to calculate tilting stiffness. Let me look into it and get back to you.

[Naresh Patre]

Hello Ghodrati

Just to update you that I have reached out to development team to see if it is possible to calculate tilting stiffness. I may get a response early next week since it's a holiday today in Ansys U.S offices. Thank you for your patience.

[Naresh Patre]

Hello Ghodrati

AIM is not exposing tilting stiffness as a direct result type for Electromagnetics problem. This question is being passed on to the Electronics development team which works on Maxwell solver (which is used by in background for solving Electromagnetics problems) to see if any workaround is possible. And for that, they would like to look at the project file that you have. So can you share the archived project file (.wbpz)? I will send you a secure transfer link separately through email for uploading the project file.

[Naresh Patre]

Hello Ghodrati

Thank you for sending the project file. I have forwarded it to the development team and will let you know their response.

[Mojgan Ghodrati]

Hello Naresh Patre , May I ask you if there is any update on my question regarding stiffness?

[Naresh Patre]

Hello Ghodrati

Apologies for the delay. I got below solution from the Maxwell developer but I need to check if it is possible in Discovery AIM or not:

The procedure should be like following:

      (1) the magnets always rotating with Z axis;

      (2) with tilting angle =0, calculate the torque:  post processing, and get the RMS value of torque curve

      (3) with tilting angle =2, calculate the torque:  post processing, and get the RMS value of torque  curve

      (4)   |Tr2-Tr1|/2   is the stiffness

[Naresh Patre]

Hello Ghodrati

The developer said that the above solution should work with Discovery AIm as well. Please let me know if you face any issues while doing so.

[Mojgan Ghodrati]

Naresh Patre Thank you very much for the reply, so I should calculate the Root Mean Square of the Torque around Y-axis (in my specific example) for 0° and 2° tilt. Then the tilting stiffness will be [RMS(TY1)-RMS(TY2)]/2, is this correct?

[Naresh Patre]

Ghodrati Yes I think so. That's what the developer had suggested.

[Mojgan Ghodrati]

Naresh Patre Thank you very much.