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  • MATHEMATICS AND INFORMATION SCIENCES  (2)
  • 2020-2022
  • 1970-1974  (2)
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Year
  • 1
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    Unknown
    Improved procedures for mass matrix-reductions in eigenvalue solutions (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Analytical models of three structures were used to test mass matrix-reduction schemes. Accuracy of four mode shapes and frequencies was tracked through successive mass matrix-reductions with diminishing numbers of indicator degrees of freedom. Results were consistently disappointing. Two new procedures were developed in attempt to improve accuracy.
    Keywords: MATHEMATICS AND INFORMATION SCIENCES
    Type: NPO-11619
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 2
    facet.materialart.
    Unknown
    Node-recording method for stiffness matrix wavefront reduction in structural analysis (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Method provides approach to automatic node relabeling that is consistent with requirements of wavefront concept. Specific applications are in analysis of aircraft, building structures, radar and surveillance structures, bridges, etc., or any other structure that is studied with aid of large and complex analytical model. Minimum growth sequencing is effective, rapid, and capable of producing economies.
    Keywords: MATHEMATICS AND INFORMATION SCIENCES
    Type: NPO-11620
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
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