Design, Analysis, And Testing Of The PACOSS D-Strut Truss

Item

Title
Design, Analysis, And Testing Of The PACOSS D-Strut Truss
Report Number
WL-TR-91-3078 Volume III, p. IAB-1 thru IAB-23
Creator
Morgenthaler, Daniel R.
Corporate Author
Martin Marietta Astronautics Group
Date
1991
Date Issued
1991-08
Extent
23
Identifier
ADA241313
Format
1 online reesouce
Abstract
Future space systems may be large, lightweight, and flexible. Such systems will often include trusswork due to the high specific strength and stiffness typical of trusses. Damping of these structures will minimize detrimental vibration, which otherwise may reduce system performance to unacceptable levels. A damping device suitable for application to trusses, which is designated the D-StrutTM,.has been developed by Honeywell. This paper discusses the further development of the damping member, the derivation of analytic procedures required for efficient integration of these members into truss structures, and the results of testing of a structure which incorporates these damping members. Following design, prototyping, fabrication, and impedance testing of D-Strut members, a truss structure which includes these members was assembled and subjected to modal testing. Comparisons of the finite element model of the truss with the experimental modal test data show excellent agreement for the first seven modes, and verify damping levels in the fundamental modes of nearly 10% critical. The D-Struts were compared with viscoelastic extensional damping members designed to produce similar damping levels. These comparisons included weight, temperature stability, strength, etc. Results of the comparisons currently favor the viscoelastic members; however, advances in the design of the viscous device will allow the D-Strut to provide an efficient damping treatment for truss structures of the future.
Description
Future space systems may be large, lightweight, and flexible. Such systems will often include trusswork due to the high specific strength and stiffness typical of trusses. Damping of these structures will minimize detrimental vibration, which otherwise may reduce system performance to unacceptable levels. A damping device suitable for application to trusses, which is designated the D-StrutTM,.has been developed by Honeywell. This paper discusses the further development of the damping member, the derivation of analytic procedures required for efficient integration of these members into truss structures, and the results of testing of a structure which incorporates these damping members. Following design, prototyping, fabrication, and impedance testing of D-Strut members, a truss structure which includes these members was assembled and subjected to modal testing. Comparisons of the finite element model of the truss with the experimental modal test data show excellent agreement for the first seven modes, and verify damping levels in the fundamental modes of nearly 10% critical. The D-Struts were compared with viscoelastic extensional damping members designed to produce similar damping levels. These comparisons included weight, temperature stability, strength, etc. Results of the comparisons currently favor the viscoelastic members; however, advances in the design of the viscous device will allow the D-Strut to provide an efficient damping treatment for truss structures of the future.
Distribution Classification
1
Distribution Conflict
No
DTIC Record Exists
No
Illinois Tech Related
No
Photo Quality
Complete
Report Availability
Full text available
Type
article
Is Part Of
Proceedings of Damping '91: 13-15 February 1991 San Diego, California (GCA-1 through JCB-17)
Media
articleIAB

Linked resources


Warning: Undefined array key "id_concat" in /var/www/html/omeka-s/themes/foundation/view/common/linked-resources.phtml on line 40

Warning: Undefined array key "property_alternate_label" in /var/www/html/omeka-s/themes/foundation/view/common/linked-resources.phtml on line 41

Warning: Undefined array key "property_label" in /var/www/html/omeka-s/themes/foundation/view/common/linked-resources.phtml on line 43
Items with "Has Part: Design, Analysis, And Testing Of The PACOSS D-Strut Truss"
Title Class
Proceedings of Damping '91: 13-15 February 1991 San Diego, California (GCA-1 through JCB-17)