(34C) Efficient Structures for Geosynchronous Spacecraft Solar Arrays

02262019, 07:06 PM
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(34C) Efficient Structures for Geosynchronous Spacecraft Solar Arrays
An extract from Efficient Structures for Geosynchronous Spacecraft Solar Arrays, NASA JPLCIT, NAS7100, FEB 1982 ,102 pgs.
INTRODUCTION The purpose of this program is to evaluate structural concepts for deploying and supporting lightweight solararray blankets for geosynchronous electrical power … SECTION 6 EXTENDIBLE SUPPORT STRUCTURE CONCEPT … 6.2 SIZEFREQUENCY RELATIONS Table 2·1 is a listing of an HP34C calculator program which correlates payload mass and frequency with ESS mass and frrquency. The latter three terms are determined by member length and cross sectional properties as outlined in Section 5. Figures 8, 9, and 10 indicate tube size, beam mass, and frequency trends of the ESS system configuration for Designs 1, 2, and 3, respectively, sized by the Euler buckling method of Eqs. (13) and (21). SECTION 7 ASTROMAST CONCEPT … 7.2 SIZEFREQUENCY RELATIONS Table IV is a listing of an HP34C calculator program which calculates beam frequency as a function of beam diameter and blanket mass. This program also calculates the maximum allowable blanket attachment spacing. Figure 17 illustrates the beam mass and frequency trends of the Astromast system. SECTION 8 STACBEAM CONCEPT … 8.2 SIZEFREQUENCY RELATIONS [i]Table V is a listing of an HP34C calculator program which correlates payload mass and frequency with STACBEAM mass and frequency; the latter three terms being determined by member length and crosssectional properties as outlined in Section 5. Figures 22, 23, and 24 indicate member size, beam rnass, and frequency trends of the STACBEAM system, using members consisting of solid rods. BEST! SlideRule 

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