Accession Number : AD0694077

Title :   COMPUTER GRAPHICS TECHNIQUES FOR STRUCTURAL SHELL ANALYSIS.

Descriptive Note : Technical rept.,

Corporate Author : AIR FORCE FLIGHT DYNAMICS LAB WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Purdy,D. M. ; Bernstein,T. N. ; Tischler,V. A.

Report Date : JUL 1969

Pagination or Media Count : 63

Abstract : Complex shell of revolution problems are frequently encountered in the design of aerospace vehicles. Several techniques have evolved which will provide satisfactory solutions for these problems. The three techniques which have become the most widely used, namely the discrete element approach, the finite difference approach, and direct numerical integration, all require the use of a digital computer. In the present paper, a method is developed which will transform the solutions, regardless of how they are obtained, into functions of a single, consistent, independent variable. This transformation which is straightforward for shells such as cylinders, cones, and spheres but complex for shells such as paraboloids, ellipsoids, and hyperboloids, makes it possible to obtain a consistent graphical representative of the variables over the entire shell. This method is applied to an existing shell analysis program and solutions to selected problems are obtained in graphical form. The computer routines required for the plotting of solutions and the instructions for modification of existing shell analysis computer programs are included. (Author)

Descriptors :   (*AEROSPACE CRAFT, SHELLS(STRUCTURAL FORMS)), (*SHELLS(STRUCTURAL FORMS), STRUCTURAL PROPERTIES), (*DIGITAL COMPUTERS, GRAPHICS), (*GRAPHICS, STRUCTURAL PROPERTIES), AIRFRAMES, ELASTIC SHELLS, BODIES OF REVOLUTION, PROBLEM SOLVING, GEOMETRIC FORMS, COMPUTER PROGRAMS, PARABOLIC BODIES, ELLIPSOIDS, MATHEMATICAL ANALYSIS, FUNCTIONS(MATHEMATICS), STRESSES, DEFORMATION

Subject Categories : Numerical Mathematics
      Computer Programming and Software
      Computer Hardware
      Unmanned Spacecraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE