单词 | Catenary | ||||||||||||||||||||||
释义 | Catenary![]() The curve a hanging flexible wire or chain assumes when supported at its ends and acted upon by a uniform gravitationalforce. The word catenary is derived from the Latin word for ``chain.'' In 1669, Jungius disprovedGalileo's Huygens The parametric equations for the catenary are given by
and the Cesàro Equation is
![]() ![]() ![]() ![]() The Arc Length, Curvature, and Tangential Angle are
The slope is proportional to the Arc Length as measured from the center of symmetry.See also Calculus of Variations, Catenoid, Lindelof's Theorem, Surface of Revolution
Geometry Center. ``The Catenary.'' http://www.geom.umn.edu/zoo/diffgeom/surfspace/catenoid/catenary.html. Gray, A. ``The Evolute of a Tractrix is a Catenary.'' §5.3 in Modern Differential Geometry of Curves and Surfaces. Boca Raton, FL: CRC Press, pp. 80-81, 1993. Lawrence, J. D. A Catalog of Special Plane Curves. New York: Dover, pp. 195 and 199-200, 1972. Lockwood, E. H. ``The Tractrix and Catenary.'' Ch. 13 in A Book of Curves. Cambridge, England: Cambridge University Press, pp. 118-124, 1967. MacTutor History of Mathematics Archive. ``Catenary.''http://www-groups.dcs.st-and.ac.uk/~history/Curves/Catenary.html. Pappas, T. ``The Catenary & the Parabolic Curves.'' The Joy of Mathematics. San Carlos, CA: Wide World Publ./Tetra, p. 34, 1989. Yates, R. C. ``Catenary.'' A Handbook on Curves and Their Properties. Ann Arbor, MI: J. W. Edwards, pp. 12-14, 1952. |
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