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Displacement of a cable in tension

  1. Apr 27, 2007 #1
    I have been stumped by this problem...

    If you have a vertial cable under tension of say 800N and you apply a horizontal tension at its mid point (node A), how can you calculate the horizontal deflection U of node A??

    Can't wait to solve this!

  2. jcsd
  3. Apr 27, 2007 #2


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    As a first pass I'd treat it like any other beam with fixed ends and a concentrated load in the center. The trick is to calculate the stiffness of the cable. This could really depend on the make up of the cable since most cables are not homogeneous and isotropic.

    In a quicker solution, I just did a search:
    http://www.hago.org.uk/faqs/formulae-2.html [Broken]
    Last edited by a moderator: May 2, 2017
  4. Apr 27, 2007 #3
    That was a really helpful link, esp with such a short description of the problem. Thanks. I wonder if maybe the same string equation could be applied but using FL/AE. Assuming homogeneous elastic material was used for the cable.

    Thanks again.
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