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Implementation of the block-Krylov boundary flexibility method of component synthesisA method of dynamic substructuring is presented which utilizes a set of static Ritz vectors as a replacement for normal eigenvectors in component mode synthesis. This set of Ritz vectors is generated in a recurrence relationship, which has the form of a block-Krylov subspace. The initial seed to the recurrence algorithm is based on the boundary flexibility vectors of the component. This algorithm is not load-dependent, is applicable to both fixed and free-interface boundary components, and results in a general component model appropriate for any type of dynamic analysis. This methodology was implemented in the MSC/NASTRAN normal modes solution sequence using DMAP. The accuracy is found to be comparable to that of component synthesis based upon normal modes. The block-Krylov recurrence algorithm is a series of static solutions and so requires significantly less computation than solving the normal eigenspace problem.
Document ID
19930013855
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Carney, Kelly S. (NASA Lewis Research Center Cleveland, OH, United States)
Abdallah, Ayman A. (Analex Corp. Brook Park, OH., United States)
Hucklebridge, Arthur A. (Case Western Reserve Univ. Cleveland, OH., United States)
Date Acquired
September 6, 2013
Publication Date
May 1, 1993
Subject Category
Structural Mechanics
Report/Patent Number
NAS 1.15:106065
NASA-TM-106065
E-7671
Meeting Information
Meeting: 1993 MSC World User''s Conference
Location: Washington, DC
Country: United States
Start Date: May 24, 1993
End Date: May 28, 1993
Sponsors: MacNeal-Schwendler Corp.
Accession Number
93N23044
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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