Hyperboloid of One Sheet

hyperboloid

Rotate Me

The “hyperboloid of one sheet” is a surface of revolution of the curve family hyperbola.

The parametric formula for the Hyperboloid of One Sheet is:

ParametricPlot3D[{Cosh@[u]*Cos@[v], Cosh@[u]*Sin@[v], Sinh@[u]}, {u, -2, 2}, {v, 0, 2*π}]

The u controls the height, and v controls the circular sweep.

hyperboloid1.nb.zip

Ruled Surface

hyperboloid of one sheet

A Hyperboloid of one sheet, showing its ruled surface property.

A hyperbola revolving around its transverse axis forms a surface called “hyperboloid of one sheet”. A hyperboloid is a Ruled Surface.

Ruled surfaces are surfaces that for every point on the surface, there is a line on the surface passing it. Or, in other words, a surface generated by a line. If for each point on the surface there are two lines on the surface passing it, then it's called doubly-ruled surface. Hyperboloid is a doubly-ruled surface.

Ruled surfaces also include cylinder and helicoid. There are only 3 doubly ruled surfaces: The hyperboloid, hyperbolic paraboloid, and plane.

hyperboloid sculpture

Two hyperboloid sculptures. The left can be made into a modern fruit basket, and the right a paper waste basket. (source: Second Life gallery)

hyperbolic basket

Photo of a real basket modeled by hyperboloid.

Spinning Cube Silhouette

The silhouette of a rotating dice is a hyperbola.

spinning cube

A sculpture emulating a spinning cube. (source: Second Life gallery)

spinning dice photo

A photo of a spinning dice. (See Photo of regular polyhedron dices)


Hyperboloid in Architecture

Due to its simplicity and beauty, the hyperboloid is often used in architecture for towers. See Hyperboloid structure. The following are some examples.

Didcot power station cooling tower

The cooling tower of Didcot Power Station. Source

Kobe port tower

The Kobe Port Tower. Source

James S McDonnell Planetarium

The James S McDonnell Planetarium building at the St. Louis Science Center. Its roof is a hyperboloid structure.


hypoid

Hyperboloid can be used for gear surface, called a Hypoid. (Source: Penrose Tiles to Trapdoor Ciphers by Martin Gardner. amazon, chapter 15).

See also hyperbola

Other algebaric surfaces that has cross-sections of conic sections are: ellipsoid, paraboloid, hyperbolic paraboloid, hyperboloid of one sheet, hyperboloid of two sheets.


hyperboloid.

2004
© 2004 by Xah Lee.