Noise due to electro magnetic forces i an motor

Naresh_20479

Hi

I want to find out the noise generated due to the electromagnetic forces between stator and rotor of a motor.

i imported forces from flux and solved a frequency response simulation in Optistruct.

Now I want to find out what is the noise generated VS Frequency of forces.

 

I have generated ERP results but I am not sure what exactly ERP represents and how nise is related to it.

Colud any one help me with methods of noise calculation rom frequence response analysis.? 

Adriano Koga_20259

Maybe this topic can help you.

Also OptiStruct user guide has some more info.

https://community.altair.com/community?id=community_question&sys_id=ff76483a1b2bd0908017dc61ec4bcbbd&view_source=searchResult

 

https://insider.altairhyperworks.com/wp-content/uploads/2015/10/1132-OptiStruct-Use-Equivalent-Radiated-PowerERP-with-Optimization-for-FRF.pdf

Naresh_20479

Thanks @ Adriano Koga

 

This is really helpful.

 

Rajesh MahadevMendagudli_20430

Adriano Koga_20259 said:

Maybe this topic can help you.

Also OptiStruct user guide has some more info.

https://community.altair.com/community?id=community_question&sys_id=ff76483a1b2bd0908017dc61ec4bcbbd&view_source=searchResult

 

https://insider.altairhyperworks.com/wp-content/uploads/2015/10/1132-OptiStruct-Use-Equivalent-Radiated-PowerERP-with-Optimization-for-FRF.pdf

Hello Adriano,

 

I am currently working on this simulation and facing an issue. Can you help me?

Lavanya Vadamodala_20519

Rajesh MahadevMendagudli_20430 said:

Hello Adriano,

 

I am currently working on this simulation and facing an issue. Can you help me?

Hello Rajesh,

Is your issue in Flux or Optistruct?

Thank you,

Lavanya

Rajesh MahadevMendagudli_20430

Lavanya Vadamodala_20519 said:

Hello Rajesh,

Is your issue in Flux or Optistruct?

Thank you,

Lavanya

Hello Lavanya,

Actually it is dependent. I ran a ERP in optistruct and am getting the below result.

 

In order to understand the the above curve, I have to understand the output curve(radial and tangential force). Can you help in reading the below curve? what is x axis and y axis mean? 

 

Thanks & Regards

Rajesh MM

Letizia_Ferrara

Rajesh MahadevMendagudli_20430 said:

Hello Lavanya,

Actually it is dependent. I ran a ERP in optistruct and am getting the below result.

 

In order to understand the the above curve, I have to understand the output curve(radial and tangential force). Can you help in reading the below curve? what is x axis and y axis mean? 

 

Thanks & Regards

Rajesh MM

From the EM point of view this is the plot of the force on one node in frequency that you can generate in the mechanical context in a constant speed working point computation.
As discussed yesterday, the frequency mainly depends on the speed (if we referring at the same motor).

Regards,

Letizia