Accession Number:

ADA191573

Title:

An Analytic Model for Aerodynamic Shapes

Descriptive Note:

Final rept. Oct 1986-Oct 1987

Corporate Author:

HARRY DIAMOND LABS ADELPHI MD

Personal Author(s):

• Vrabel, Michael J.

Report Date:

1988-03-01

Pagination or Media Count:

62.0

Abstract:

Exact analytical models represent a viable alternative for applications requiring geometric constructs with a level of surface perfection unachievable with traditional polynomial techniques. To avoid the limitations in shape complexity normally associated with traditional analytic models, a model based upon a topological transformation of a lofted surface was developed. The consequence is, if not an equation of all shapes, then, at least, an equation describing a great many arbitrarily complicated shapes. A full theoretical development of the model is presented along with a model-implementing FORTRAN source module and some example geometries. Keywords Computer graphics Lofted surface Superquadric Analytic surface model, Surface modelling Topological transformation.

Descriptors:

• *AERODYNAMIC CONFIGURATIONS
• *MATHEMATICAL MODELS
• COMPUTER GRAPHICS
• EQUATIONS
• POLYNOMIALS
• SHAPE
• SURFACES
• TOPOLOGY
• TRANSFORMATIONS

Subject Categories:

• Aerodynamics
• Computer Programming and Software

Distribution Statement:

APPROVED FOR PUBLIC RELEASE