Incorrect dimension for mechanical set

Tom_21862
Tom_21862 Altair Community Member
edited August 2022 in Community Q&A

Hi all,

I am trying to get the "Linear actuator" example running for transient magnetic 3D application.
I added the steps from "Translating Motion Tutorial - 3D Technical Example" - Case 2: Study using the coupled load kinematic model (with circuit coupling).

I ran into following issues I don't know how to resolve:

When I don't assign the "mechanical set holding the coil" I get following error:

The mechanical set FIXED_PART is not used
No mechanical set for COIL_1
Coils without mechanical set on stranded coil COILCONDUCTOR_1
The project has non meshed coil but it has no region
with reduced potential formulation :
MT3RED or MT3SCRHJ (or MT3SCRT0W)
Unable to solve the project

When I assign "FIXED_PART" to "mechanical set holding the coil" I only get a warning, the solver starts but fails:

Begin of physical check ...
The mechanical set FIXED_PART is not used
End of physical check.
...
Active formulation(s) :
MT3SCRHJ : Transient magnetic HJ reduced scalar potential formulation with ci
MT3SCA : Transient magnetic total scalar potential formulation
Matrix system : non linear, real, symmetrical
Problem while evaluating. Unable to solve the project.
Incorrect dimension for mechanical set: 1


I hope someone can help.

Regards,
Tom

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Answers

  • Alexandru-Ionel Constantin
    Alexandru-Ionel Constantin Altair Community Member
    edited August 2022

    Hi Tom,

     

    I think that you missed a step in the Translating Motion Tutorial - 3D Technical Example.

    Try to set the characteristics of the application are presented in the table below, page 64, by Menu: Application> Edit current application.

    image

     

    Best regards,

    Alexandru

  • rimanr_20717
    rimanr_20717 Altair Community Member
    edited August 2022

    Good morning all; I have the same problem.
    I made a simulation of a single turn arranged far from the global reference (which is not the center of this turn), in rotation around an axis of the global reference, in order to have the magnetic field produced .
    can you help me
    regards

  • Tom_21862
    Tom_21862 Altair Community Member
    edited August 2022
    Alexandru-Ionel Constantin said:

    Hi Tom,

     

    I think that you missed a step in the Translating Motion Tutorial - 3D Technical Example.

    Try to set the characteristics of the application are presented in the table below, page 64, by Menu: Application> Edit current application.

    image

     

    Best regards,

    Alexandru

    Thank you for the reply.

    I double-checked and triple-checked all the settings, but still the same error.

    When I open the file "Translating Motion Tutorial - 3D Technical Example" there are no problems with solving, but as soon as I try to do the steps on my own following the pdf tutorial, I get the error message.

    I also tried to create a very simple model from scratch consisting of 1 non-meshed coil (fixed part) and 1 meshed iron cylinder (moving part). I get exactly the same error.

    Are there some steps required that are not described in the tutorial?

     

  • Alexandru-Ionel Constantin
    Alexandru-Ionel Constantin Altair Community Member
    edited August 2022
    Tom_21862 said:

    Thank you for the reply.

    I double-checked and triple-checked all the settings, but still the same error.

    When I open the file "Translating Motion Tutorial - 3D Technical Example" there are no problems with solving, but as soon as I try to do the steps on my own following the pdf tutorial, I get the error message.

    I also tried to create a very simple model from scratch consisting of 1 non-meshed coil (fixed part) and 1 meshed iron cylinder (moving part). I get exactly the same error.

    Are there some steps required that are not described in the tutorial?

     

    Hi Tom,

     

    Can you send the Flux Project(without mesh) as an archive?

     

    Best regards,

    Alexandru

  • Alexandru-Ionel Constantin
    Alexandru-Ionel Constantin Altair Community Member
    edited August 2022
    rimanr_20717 said:

    Good morning all; I have the same problem.
    I made a simulation of a single turn arranged far from the global reference (which is not the center of this turn), in rotation around an axis of the global reference, in order to have the magnetic field produced .
    can you help me
    regards

    Hi,

     

    Can you send the Flux Project(without mesh) as an archive?

     

    Best regards,

    Alexandru

     

  • Tom_21862
    Tom_21862 Altair Community Member
    edited August 2022
    Alexandru-Ionel Constantin said:

    Hi Tom,

     

    Can you send the Flux Project(without mesh) as an archive?

     

    Best regards,

    Alexandru

    Hi Alexandru,

    here is the example project: 

    https://easyupload.io/p9742a

    Password: flux

    Regards Tom

  • Alexandru-Ionel Constantin
    Alexandru-Ionel Constantin Altair Community Member
    edited August 2022
    Tom_21862 said:

    Hi Alexandru,

    here is the example project: 

    https://easyupload.io/p9742a

    Password: flux

    Regards Tom

    Hi Tom,

     

    The CORE volume region has no associated geometric volume.

    You need to create an air volume region that will include the volumes of the infinite box(volumes 3-8) and assign the FIXED mechanical set( in the tutorial there was a fixed magnetic core), for example with the name Infinite.

     

    You can run the following PyFlux code in the Command prompt from the PyFlux Command window:

     

    Volume[1].region=RegionVolume['CORE']

     

    lastInstance = RegionVolume(name='Infinite',

                 magneticTransient3D=MagneticTransient3DVolumeVacuum(),

                 visibility=Visibility['VISIBLE'],

                 mechanicalSet=MechanicalSet['FIXED'])

     

    Volume[7,6,3,8,4,5].region=RegionVolume['INFINITE']

     

    Best regards,

    Alexandru

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