Theoretical and Software Considerations for General Dynamic Analysis Using Multilevel Substructured Models
View/ Open
Issue Date
1985-09Author
Schmidt, Richard J.
Dodds, Robert H., Jr
Publisher
University of Kansas Center for Research, Inc.
Type
Technical Report
Is part of series
SM Report;15
Published Version
https://iri.ku.edu/reportsMetadata
Show full item recordAbstract
An approach is presented for the dynamic analysis of complex structure sy~t'=!!!S using the finite element method and multilevel substructured models. The fixedinterface method is selected for substructure reduction because of its efficiency, accurac and adaptability to restart and reanalysis. This method is extended to reduction of substructures which are themselves composed of reduced substructures. Emphasis is placed on the implementation and performance of the method in a general purpose software system. Solution algorithms consistent with the chosen data structures are presented in detail. This study demonstrates that successful finite element software requires the use of software executives to supplement the algorithmic language. As modeling and analysis techniques become more complex, proportionally more implementation effort is spent on data and computer resource management. Executive systems are essential tools for these tasks. The complexity of the implementation of restart and reanalysis porcedures also illustrate the need for executive systems to support the non computational aspects of the software. The example problems show that significant computational efficiencies can be achieved through proper use of substructuring and reduction techniques without sacrificing solution accuracy. The unique restart and reanalysis capabilities developed in this study and the flexible procedures for multilevel substructured modeling allow analysts to achieve economical yet accurate analyses of complex structural systems.
Collections
Citation
Schmidt, R.J., and Dodds, R.H., Jr., "Theoretical and Software Consideration for General Dynamic Analysis Using Multilevel Substructured Models," SM Report No. 15, Research Grant NAG3-32, NASA Lewis Research Center, September 1985, 158 pp.
Items in KU ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.
We want to hear from you! Please share your stories about how Open Access to this item benefits YOU.