NDLI: Combining Acceleration and Displacement Dependent Modal Frequency Responses Using an MSC/NASTRAN DMAP Alter

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Combining Acceleration and Displacement Dependent Modal Frequency Responses Using an MSC/NASTRAN DMAP Alter

Content Provider	Semantic Scholar
Author	Barnett, A. Ross Widrick, Timothy W. Ludwiczak, Damian R.
Copyright Year	1996
Abstract	Alan R. Barnett and Timothy W. WidrickAnalex Corporation3001 Aerospace ParkwayBrook Park, Ohio 44142Damian R. LudwiczakNational Aeronautics and Space AdministrationLewis Research CenterCleveland, Ohio 44135AbstractSolving for dynamic responses of free-free launch vehicle / spacecraft systems acted upon by buffeting winds iscommonly performed throughout the aerospace industry. Due to the unpredictable nature of this wind loading event,these problems are typically solved using frequency response random analysis techniques. To generate dynamicresponses for spacecraft with statically-indeterminate interfaces, spacecraft contractors prefer to develop models whichhave response transformation matrices developed for mode acceleration data recovery. This method transformsspacecraft boundary accelerations and displacements into internal responses. Unfortunately, standardMSCfNASTRAN modal frequency response solution sequences cannot be used to combine acceleration- anddisplacement-dependent responses required for spacecraft mode acceleration data recovery. External user-writtencomputer codes can be used with MSC/NASTRAN output to perform such combinations, but these methods can belabor and computer resource intensive. Taking advantage of the analytical and computer resource efficienciesinherent within MSC/NASTRAN, a DMAP Alter has been developed to combine acceleration- and displacement-dependent modal frequency responses for performing spacecraft mode acceleration data recovery. The Alter has beenused successfully to efficiently solve a common aerospace buffeting wind analysis.
File Format	PDF HTM / HTML
Alternate Webpage(s)	https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19960017265.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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