NEW COMPUTER SOFTWARE FROM NASA 
STRUCTURAL ANALYSIS

The Panel Analysis and Sizing Code (PASCO) was developed at NASA Langley
Research Center for the buckling and vibration analysis and sizing of
prismatic structures having an arbitrary cross section. PASCO is primarily
intended for analyzing and sizing stiffened panels made of laminated
orthotropic materials and is of particular value in analyzing and sizing
filamentary composite structures. When used in the analysis mode, PASCO
calculates laminate stiffnesses, lamina stress and strains (including the
effects of temperature and panel bending), buckling loads, vibration
frequencies, and overall panel stiffness. When used in the sizing mode,
PASCO adjusts sizing variables to provide a lowmass panel design that
carries a set of specified loadings without exceeding buckling or material
strength allowables and that meets other design requirements such as upper
and lower bounds on sizing variables, upper and lower bounds on overall
bending, extensional and shear stiffnesses, and lower bounds on vibration
frequencies.

The DEC VAX and CDC CYBER versions of PASCO were written in FORTRAN IV for
batch execution. The new Macintosh version includes an interactive graphic
preprocessor called MacPASCO. It was developed for Macintosh II series
computers with at least 2Mb of RAM running MPW Pascal 3.0 and Language
Systems FORTRAN 2.0 under the MPW programming environment. It includes MPW
compatible makefiles for compiling the source code. MacPASCO is System 7.0
compatible. A minimum of 2Mb of RAM is required for execution. The
Macintosh version of PASCO, inventory number LAR-14799, is distributed on
four 3.5 inch 800K Macintosh format diskettes. PASCO was developed in
1981, adapted to the DEC VAX in 1983 and to the Macintosh in 1991. Program
$2,000; documentation $67.

COSMIC, The University of Georgia
382 East Broad St, Athens, GA 30602-4272
(706) 542-3265;  Fax: (706) 542-4807

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