Price: 30.00 USD

This JTB Catenary app for AutoCAD makes it easy to create or draw a catenary curve as a polyline by specifying the start and end point and the length and optionally a diameter (width) or sag. This can be useful for drawing freely hanging cable, hose, chain, transmission line, anchor line (anchor rode), cord, rope, string, suspension bridge cable, arch, hawser, wire or the like.

About

About JTB Catenary

This JTB Catenary app for AutoCAD makes it easy to create or draw a catenary curve as a polyline by specifying the start and end point and the length and optionally a diameter (width) or sag. This can be useful for drawing freely hanging cable, hose, chain, transmission line, anchor line (anchor rode), cord, rope, string, suspension bridge cable, arch, hawser, wire or the like.

The current version is creating a catenary line using the catenary formula y = cosh(x) = (e^x + e^-x)/2 and numeric analysis that results in a good enough curve for many purposes. The program does not take into account the tension of an elastic catenary, weight and so on. Support for this can be added based on user requests.

A parabola is different from a catenary. The catenary is the solution to a differential equation that describes a shape that directs the force of its own weight along its own curve, so that, if hanging, it is pulled into that shape, and, if standing upright, it can support itself. The parabola does not have the same property.

Catenary described according to Wikipedia:

In physics and geometry, the catenary is the curve that an idealized hanging chain or cable assumes under its own weight when supported only at its ends. The curve has a U-like shape, superficially similar in appearance to a parabola (though mathematically quite different). It also appears in the design of certain types of arches and as a cross section of the catenoid -- the shape assumed by a soap film bounded by two parallel circular rings.
The catenary is also called the "alysoid", "chainette", or, particularly in the material sciences, "funicular".
Mathematically, the catenary curve is the graph of the hyperbolic cosine function. The surface of revolution of the catenary curve, the catenoid, is a minimal surface, and is the only minimal surface of revolution other than the plane. The mathematical properties of the catenary curve were first studied by Robert Hooke in the 1670s, and its equation was derived by Leibniz, Huygens and Johann Bernoulli in 1691.
Catenaries and related curves appear in architecture and engineering, in the design of bridges and arches. A sufficiently heavy anchor chain will form a catenary curve.
Most suspension bridge cables like the Golden Gate Bridge follow a parabolic, not a catenary curve, due to the weight of the roadway being much greater than that of the cable.

JTB Catenary is available as an AutoCAD app on the Plug-ins or Add-ins tab.


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If you want other features added like tension, 3D, Catenary curve through three points or support for other CAD programs like Autodesk Revit, BricsCAD, ZWCAD+ or other DWG editors feel free to contact us with your wishes.