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kranic24
Posts: 20
Registered: ‎04-05-2012
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Cable Thermal Load

158 Views, 4 Replies
07-18-2013 11:51 AM

I want to determine the effects of an increase/decrease in temperature on a simple cable. For example, an overall 90 degree Fahrenheit change in temperature along a 100 foot 8mm cable.

 

I've setup the temperature Load Type and Nature and applied the +/- 90deg thermal load using that type. When I calculate, I do not see any change to reaction and the deflections say "NA".

 

What am I doing wrong?

 

Thanks for the help.

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Artur.Kosakowski
Posts: 4,717
Registered: ‎12-17-2010

Re: Cable Thermal Load

07-19-2013 12:11 AM in reply to: kranic24

See the attached picture.

 

If you find your post answered press the Accept as Solution button please. This will help other users to find solutions much faster. Thank you.

 



Artur Kosakowski
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Contributor
kranic24
Posts: 20
Registered: ‎04-05-2012

Re: Cable Thermal Load

07-19-2013 05:31 AM in reply to: Artur.Kosakowski

Thank you for your reply.

 

This has not resolved my question. I have setup the cable and thermal as you have shown however there remains no force due to the thermal load input.

 

Please reference attached model.

 

Thanks.

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Product Support
Artur.Kosakowski
Posts: 4,717
Registered: ‎12-17-2010

Re: Cable Thermal Load

07-19-2013 06:07 AM in reply to: kranic24

Almost like but: smileyhappy:

 

1. I think that the assembly load case (the first defined) should include self weight

2. You requested the force in cable to be 0 for the assembly load case which is impossible if any load is defined

3. The TY temperature load would cause bending rather than axial force. You should use TX instead.

 

Please check:

http://forums.autodesk.com/t5/Autodesk-Robot-Structural/câbles/m-p/3302449

http://forums.autodesk.com/t5/Autodesk-Robot-Structural/cable-design/m-p/3226780

http://forums.autodesk.com/t5/Autodesk-Robot-Structural/Cable-assembly-force-and-regulation-distance...

http://docs.autodesk.com/RSAPRO/2014/ENU/filesROBOT/GUID-E4AB6038-D264-45C9-80F9-B06BC6877943.htm

 

If you find your post answered press the Accept as Solution button please. This will help other users to find solutions much faster. Thank you.



Artur Kosakowski
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Contributor
kranic24
Posts: 20
Registered: ‎04-05-2012

Re: Cable Thermal Load

07-19-2013 06:34 AM in reply to: Artur.Kosakowski

Thanks again Artur.

 

I am analyzing this as a "cable" however this is actually a group of thin rods therefore there will be no pretension. Initial force in the group of rods is basically zero.

 

Applying the thermal load as TX has solved my issue.

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