Final report LDRD project 105816 : model reduction of large dynamic systems with localized nonlinearities.

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Advanced computing hardware and software written to exploit massively parallel architectures greatly facilitate the computation of extremely large problems. On the other hand, these tools, though enabling higher fidelity models, have often resulted in much longer run-times and turn-around-times in providing answers to engineering problems. The impediments include smaller elements and consequently smaller time steps, much larger systems of equations to solve, and the inclusion of nonlinearities that had been ignored in days when lower fidelity models were the norm. The research effort reported focuses on the accelerating the analysis process for structural dynamics though combinations of model reduction and ... continued below

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144 p.

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Lehoucq, Richard B.; Segalman, Daniel Joseph; Hetmaniuk, Ulrich L. (University of Washington, Seattle, WA) & Dohrmann, Clark R. October 1, 2009.

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Advanced computing hardware and software written to exploit massively parallel architectures greatly facilitate the computation of extremely large problems. On the other hand, these tools, though enabling higher fidelity models, have often resulted in much longer run-times and turn-around-times in providing answers to engineering problems. The impediments include smaller elements and consequently smaller time steps, much larger systems of equations to solve, and the inclusion of nonlinearities that had been ignored in days when lower fidelity models were the norm. The research effort reported focuses on the accelerating the analysis process for structural dynamics though combinations of model reduction and mitigation of some factors that lead to over-meshing.

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144 p.

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  • Report No.: SAND2009-6862
  • Grant Number: AC04-94AL85000
  • DOI: 10.2172/992314 | External Link
  • Office of Scientific & Technical Information Report Number: 992314
  • Archival Resource Key: ark:/67531/metadc1012584

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Office of Scientific & Technical Information Technical Reports

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  • October 1, 2009

Added to The UNT Digital Library

  • Oct. 14, 2017, 8:36 a.m.

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  • Oct. 19, 2017, 8:11 p.m.

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Lehoucq, Richard B.; Segalman, Daniel Joseph; Hetmaniuk, Ulrich L. (University of Washington, Seattle, WA) & Dohrmann, Clark R. Final report LDRD project 105816 : model reduction of large dynamic systems with localized nonlinearities., report, October 1, 2009; United States. (https://digital.library.unt.edu/ark:/67531/metadc1012584/: accessed July 21, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.