Accession Number:

ADB029162

Title:

FASTOP-3: A Strength, Deflection, and Flutter Optimization Program for Metallic and Composite Structures. Volume 1. Theory and Application

Descriptive Note:

Final rept. May 1977-May 1978

Corporate Author:

GRUMMAN AEROSPACE CORP BETHPAGE NY

Personal Author(s):

• Markowitz, Joel
• Isakson, Gabriel

Report Date:

1978-05-01

Pagination or Media Count:

86.0

Abstract:

This report presents the results of an effort to improve the usefulness of the FASTOP Flutter and Strength Optimization Program computer- program system, originally documented in AFFDL-TR-75-137, by introducing the capabilities of the ASOP-3 program, as documented in AFFDL-TR-76-157. The new version of the system is named FASTOP-3. The following improvements have been made 1 composite materials of laminated filamentary construction can be resized for strength and flutter-speed constraints with the same level of automation that previously existed for metallic construction. 2 A deflection constraint generalized as a linear combination of translational displacements at several structural nodes can be applied to metallic and composite structures. This permits the treatment of constraints on lifting-surface twist and camber. 3 Multiple deflection constraints can be treated in a limited, but practically important, class of problems by multiple submissions of single- constraint cases. This process has been largely automated. 4 Elastic restraint at structural support points can be treated. 5 Reactions at rigid and elastic supports are computed and their resultants determined.

Descriptors:

• *LIFTING SURFACES
• *FLUTTER
• *AIRFRAMES
• *STRENGTH(MECHANICS)
• MATHEMATICAL LOGIC
• ELASTIC PROPERTIES
• COMPOSITE STRUCTURES
• STRUCTURAL ENGINEERING
• MODEL THEORY
• OPTIMIZATION
• METALS
• COMPUTER PROGRAMS
• DEFLECTION

Subject Categories:

• Aircraft
• Fluid Mechanics
• Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE