Tranmission line cable simulation in ANSYS Workbench

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  • Last Post 07 May 2019
zw123456 posted this 07 May 2019

 Hi Peter,

 How are you? Could you please have a look?

 1. The result of SMISC1 is 3.4165E5, is it too large for tension force? 

 2. the result is not sensitive for lateral force only along Z axis?

 3. The equation for calculation for initial strain, unit less  Y is young's modulus, F is pretension, A is section area?

  thanks for help!

  two cables are connected with beam (truss) for transmission line simulation.

 

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zw123456 posted this 07 May 2019

peteroznewman posted this 07 May 2019

Hello,

I will answer question #3. The equation for Strain looks correct. 

I hope jj77 will comment on questions #1 and #2 because he understands transmission line problems very well.

It will help if you attach an archive of the model to your post for easy inspection of the model.

Regards,
Peter

jj77 posted this 07 May 2019

Thanks, but not really an expert in cables, I work and develop some fea so that is my area perhaps. Not sure about that as for the force check reactions and they will match the internal cable force. I am very busy at work and off so I will not have time to look into this. Good luck

peteroznewman posted this 07 May 2019

Hi zw123456,

For question #1, you ask if 341 kN is too large a force for the cable.

Cable manufacturers have specifications on break strength. Look up what the break strength is for that cable and divide that number by 341 kN to get your Safety Factor. 

For question #2, what do you mean lateral force?  Which result are you asking about? You have gravity which is a lateral force. If you replace gravity with acceleration, so you can type in a higher or lower value than 9.8 m/s^2. What happens to the tension if you cut gravity in half or double it?  Note that you have to point the acceleration vector in the opposite direction to where gravity was pointing. For example, if gravity was -Y then the same acceleration is +Y.

@jj77, I learned from you how to get cable models to converge using the INISTATE command, so thanks for that!

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