Correct boundary conditions and settings for rotating shaft?

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  • Last Post 08 October 2018
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ENV159 posted this 05 October 2018

Hello,

I am designing a rotating shaft to minimize deflection and I am not too experienced with FEA. What I will be changing will most likely be the bearing types and the location of them.The shaft will have bearings near both ends of the shaft and a load will be on one end. Will the bearings be considered a fixed support on the FEA model or will it be something else? If the bearing types are different how will I model this in Ansys?

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peteroznewman posted this 05 October 2018

Hello,

You can use a connection called a Bearing to model bearings.

That connects a face or edge to ground with a springs that you can enter the bearing manufacturer's specification for bearing stiffness.

Regards,

Peter

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akhemka posted this 05 October 2018

Hi,

How are you planning to minimize the deflection - the reason to ask is to see what changes/ things you are looking for?

 

Regards,

Ashish Khemka

ENV159 posted this 05 October 2018

Thank you so much!

ENV159 posted this 05 October 2018

So to minimize deflection I will be changing the diameter of the shaft, the bearing span or location of the bearings, and the bearing types. The shaft will be designed for a spindle on a CNC machine. Are there any other parameters I should focus on? I don't think material will be a major factor but I will also focus on that.

akhemka posted this 08 October 2018

Hi,

 

Thanks for the update. I think most of the changes will be within geometry and I believe you will be studying the change for one bearing type and then change the bearing type. I have no other suggestions.

 

Regards,

Ashish Khemka

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