Results 81 to 90 of about 2,165 (141)
Sensitivity analysis for large-scale problems [PDF]
The development of efficient techniques for calculating sensitivity derivatives is studied. The objective is to present a computational procedure for calculating sensitivity derivatives as part of performing structural reanalysis for large-scale problems.
Noor, Ahmed K., Whitworth, Sandra L.
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An 11-meter deployable truss for the SEASAT radar antenna [PDF]
, 1979 A folding three dimensional truss and tripod assembly which deploys the SEASAT Synthetic Aperture Radar Antenna is described. The folding structure with the antenna panels and rf components stows in an 8.5-inch-thick package.
Campbell, B. E., Hawkins, W.
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Dynamic analysis of flexible mechanical systems using LATDYN [PDF]
A 3-D, finite element based simulation tool for flexible multibody systems is presented. Hinge degrees-of-freedom is built into equations of motion to reduce geometric constraints.
Chang, Che-Wei +2 more
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Investigation of Helicopter Longeron Cracks [PDF]
Four cracked longerons, containing a total of eight cracks, were provided for study. Cracked regions were cut from the longerons. Load was applied to open the cracks, enabling crack surface examination.
Baughman, James +2 more
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STUDY ON DAMPING CHARACTERISTICS OF LONGERON TUBES FOR NOISE SPECTRA COMPUTING ACCURACY INCREASE
Advanced Engineering Research, 2012 Studies on the noise generation pattern under the long co mponent milling are resulted. It is shown that the noise abatement can be achieved through the choice of the longeron and support unit loss factors.
openaire +2 more sources
Thermally stable deployable structure [PDF]
A deployable structure which meets stringent thermal and strength requirements in a space environment was developed. A mast with a very low coefficient of thermal expansion (CTE) was required to limit the movement from thermal distortion over the ...
Kegg, Colleen M.
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Batten augmented triangular beam [PDF]
The BAT (Batten-Augmented Triangular) BEAM is characterized by battens which are buckled in the deployed state, thus preloading the truss. The preload distribution is determined, and the effects of various external loading conditions are investigated ...
Adams, Louis R., Hedgepeth, John M.
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LDEF geometry/mass model for radiation analyses [PDF]
A three-dimensional geometry/mass model of LDEF is under development for ionizing radiation analyses. This model, together with ray tracing algorithms, is being programmed for use both as a stand alone code in determining three-dimensional shielding ...
Armstrong, T. W., Colborn, B. L.
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Thermal-distortion analysis of a spacecraft box truss in geostationary orbit [PDF]
The Mission to Planet Earth enlists the use of a geostationary platform to support Earth science monitoring instruments. The strongback for a proposed geostationary platform is a deployable box truss that supports two large diameter passive microwave ...
Cosgrove, Patrick A. +2 more
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Ground test article for deployable space structure systems [PDF]
The ground test article fabrication and assembly plan was completed by Santek Engineering, Inc. The plan was reviewed and accepted by Rockwell during an on-site visit to the Santek facility. Raw material and hardware orders were placed by Santek in July.
Malloy, G. D.
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