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Cable over Roller or Pulley

You can model roller support for the cable, A series of cable tips are given as follows:

  • Perform a nonlinear analysis. Forces in the cable are dependent on its shape; therefore, a nonlinear analysis is required for understanding cable behavior.
  • Draw initial cable geometry accurately, as this will affect subsequent behavior.
  • Cables over roller or pulley systems – A cable may be modeled with a roller support such that the undeformed length

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  • between the roller and adjacent support points remains the same

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  • , independent of applied

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  • loading,

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  • while the roller

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  • is free to translate according to load application.
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  • However, it is not possible to directly model the sliding or rolling of

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  • a cable over

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  • a pulley,

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  • where the undeformed length of the cable

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  • segments on either side of the pulley or roller change as loads are applied.

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  • Load the cables after defining geometry and supports.
  • To apply a point load to

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  • a cable, multiple cable segments should be modeled such that a point object

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  • exists at the location

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  • of load application. 
  • To apply a uniform load over part of a cable, subdivide the cable into one or more segments where the length of the segment(s) is the length of the uniform load. Then apply the uniform load to the segment(s).
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Related Incidents:

  • Incident 47119: How to model cables
  • If a cable location needs to be changed, delete the cable and redraw it in the new location, rather than changing joint coordinates. Cable stiffness will change unless the distance between joints remains exactly the same.
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Related Incidents:

  • Incident 47403: Assigning new joints to a cable does not move the cable to the new location

See Also