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Accession Number N20120014472
Title Preliminary Sizing Study of Ares-I and Ares-V Liquid Hydrogen Tanks.
Publication Date Apr 2012
Media Count 12p
Personal Author D. W. Harper S. T. Oliver
Abstract A preliminary sizing study of two cryogenic propellant tanks was performed using a FORTRAN optimization program to determine weight efficient orthogrid designs for the tank barrels sections only. Various tensile and compressive failure modes were considered, including general buckling of cylinders with a shell buckling knockdown factor. Eight independent combinations of three design requirements were also considered and their effects on the tanks weight. The approach was to investigate each design case with a variable shell buckling knockdown factor, determining the most weight efficient combination of orthogrid design parameters. Numerous optimization analyses were performed, and the results presented herein compare the effects of the different design requirements and shell buckling knockdown factor. Through a series of comparisons between design requirements or shell buckling knockdown factors, the relative change in overall tank barrel weights is shown. The findings indicate that the design requirements can substantually increase the tank weight while a less conservative shell buckling knockdown factor can modestly reduce the tank weight.
Keywords Ares 1 launch vehicle
Ares 5 cargo launch vehicle
Cryogenic rocket propellants
Design optimization
Fail-safe systems
Failure modes
Liquid hydrogen
Mechanical properties
Propellant tanks
Skin(Structural member)
Structural weight
Tensile tests

Source Agency National Aeronautics and Space Administration
NTIS Subject Category 50 - Civil Engineering
84G - Unmanned Spacecraft
Corporate Author National Aeronautics and Space Administration, Huntsville, AL. George C. Marshall Space Flight Center.
Document Type Conference proceedings
Title Note N/A
NTIS Issue Number 1307
Contract Number N/A

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