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amitabha0107
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Transmission Line Spring Constant/Stiffness Coefficient

12/22/2013 11:42 PM

For a electrical transmission line tower how we can calculate spring constant/ stiffness coefficient using excel based calculation?
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70AARCuda
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#1

Re: Transmission line spring constant/ stiffness coefficient

12/22/2013 11:56 PM

See these below two sections in REFERENCE DATA FOR ENGINEERS: RADIO, ELECTRONICS, COMPUTER, and COMMUNICATIONS, 7th ed. (1986), Howard W Sams:

Chapter 48 - MISCELLANEOUS DATA: Transmission-Line Sag Calculations

• 48-19 - Supports at Same Level, Fig 4. Supports at same elevation.

• 48-20 - Supports at Different Levels, Fig 5. Supports at different elevation.

The necessary equations accompany each figure.

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dj95401
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#2

Re: Transmission line spring constant/ stiffness coefficient

12/23/2013 12:47 AM

So your still in school? And still looking for free advice and answers to your home work assignments? You might try looking here to start with. I found it very helpful

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Tornado
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#3

Re: Transmission line spring constant/ stiffness coefficient

12/23/2013 1:28 AM

I think you need something bigger than Excel for this, unless you want to enter manually a bunch of fairly complex formulas.

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lyn
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#4

Re: Transmission line spring constant/ stiffness coefficient

12/23/2013 3:21 AM

Start here↑
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passingtongreen
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#5

Re: Transmission line spring constant/ stiffness coefficient

12/23/2013 8:46 AM

I assume this is a truss type tower, the single tube type is too simple. The "Virtual Work" method lends itself to spread sheets. This works for statically determinate structures. The problem is that for each point where you want to know the deflection, you must find the forces in all of the members for a unit load at that point.

Scroll down to page 6 for a simple example.

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RAMConsult
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#6

Re: Transmission Line Spring Constant/Stiffness Coefficient

12/24/2013 3:30 PM

You can't. Since you claim to be an electrical engineer, passing yourself off as a mechanical engineer to do such safety/critical work is not only dangerous it is unethical as well.

As others have pointed out to you in this and many other threads, asking others for free advice and then using it to collect a consulting fee is a sham that none of us should support.

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WoodwardDL
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#7

Re: Transmission Line Spring Constant/Stiffness Coefficient

12/25/2013 1:31 PM

Use Nastran.
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70AARCuda (1); dj95401 (1); lyn (1); passingtongreen (1); RAMConsult (1); Tornado (1); WoodwardDL (1)

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