SYMBOLIC MANIPULATION AS A TOOL FOR DESIGN OF DEPLOYABLE DOMES

Abstract Deployable structures are prefabricated space frames consisting of straight bars linked together in the factory as a compact bundle, which can then be unfolded into large-span, load-bearing structural forms by simple articulation. The specific deployable structures investigated in this study are characterized by being self-standing and stress-free when fully closed or fully deployed. In order to achieve this behaviour, a detailed geometric design is required which consists of deriving and solving sets of nonlinear geometric and trigonometric equations. The symbolic manipulation package Mathematica is used for the geometric design of near-spherical deployable structures. This application demonstrates the great potential of symbolic manipulation as a tool for engineering design.

[1]  Peter C. Gasson,et al.  Geometry of spatial forms , 1983 .

[2]  Donald G. Wood Space enclosure systems : the variables of packing cell design , 1973 .

[3]  Jerome J. Connor,et al.  Deployability Conditions for Curved and Flat, Polygonal and Trapezoidal Deployable Structures , 1993 .

[4]  E. Kuznetsov Underconstrained structural systems , 1991 .

[5]  Jerome J. Connor,et al.  Equivalent Continuum Model for Deployable Flat Lattice Structures , 1994 .

[6]  H. Saunders,et al.  Finite element procedures in engineering analysis , 1982 .

[7]  Charalambos Gantes A design methodology for deployable structures , 1991 .

[8]  Stephen Wolfram,et al.  Mathematica: a system for doing mathematics by computer (2nd ed.) , 1991 .

[9]  Jerome J. Connor,et al.  Geometric Design of Deploybale Structures with Discrete Joint Size , 1993 .

[10]  Sergio Pellegrino,et al.  The pantographic deployable mast: design, structural performance and deployment tests , 1991 .

[11]  Zhong You,et al.  Foldable ring structures. , 1993 .

[12]  M. D. Rhodes New concepts in deployable beam structures , 1985 .

[13]  Jerome J. Connor,et al.  Simulation of the Deployment Process of Multiunit Deployable Structures On a Cray-2 , 1993, Int. J. High Perform. Comput. Appl..

[14]  K. Miura,et al.  An Adaptive Structure Concept for Future Space Applications , 1988 .

[15]  Jerome J. Connor,et al.  SIMPLE FRICTION MODEL FOR SCISSOR-TYPE MOBILE STRUCTURES , 1993 .

[16]  Juan Pérez-Valcárcel,et al.  Design of expandable spherical grids , 1989 .

[17]  Donald G. Wood Space enclosure systems : identification and documentation of cell geometries , 1973 .

[18]  Charis J. Gantes Geometric constraints in assembling polygonal deployable units to form multi-unit structural systems. , 1993 .

[19]  Jerome J. Connor,et al.  A Systematic Design Methodology for Deployable Structures , 1994 .

[20]  Sergio Pellegrino,et al.  Active and passive cable elements in deployable masts , 1991 .

[21]  Jerome J. Connor,et al.  Combining numerical analysis and engineering judgment to design deployable structures , 1991 .