Damage detection and model refinement using elemental stiffness perturbations with constrained connectivity Metadata

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  • Main Title Damage detection and model refinement using elemental stiffness perturbations with constrained connectivity


  • Author: Doebling, S.W.
    Creator Type: Personal


  • Sponsor: United States. Department of Energy.
    Contributor Type: Organization
    Contributor Info: USDOE, Washington, DC (United States)


  • Name: Los Alamos National Laboratory
    Place of Publication: New Mexico
    Additional Info: Los Alamos National Lab., NM (United States)


  • Creation: 1996-04-01


  • English


  • Content Description: A new optimal update method for the correlation of dynamic structural finite element models with modal data is presented. The method computes a minimum-rank solution for the perturbations of the elemental stiffness parameters while constraining the connectivity of the global stiffness matrix. The resulting model contains a more accurate representation of the dynamics of the test structure. The changes between the original model and the updated model can be interpreted as modeling errors or as changes in the structure resulting from damage. The motivation for the method is presented in the context of existing optimal matrix update procedures. The method is demonstrated numerically on a spring-mass system and is also applied to experimental data from the NASA Langley 8-bay truss damage detection experiment. The results demonstrate that the proposed procedure may be useful for updating elemental stiffness parameters in the context of damage detection and model refinement.
  • Physical Description: 12 p.


  • Keyword: Modifications
  • Keyword: Cracks
  • Keyword: Mechanical Structures
  • Keyword: Correlations
  • Keyword: Damage
  • Keyword: Mathematical Models
  • Keyword: Response Functions
  • Keyword: Detection
  • Keyword: Finite Element Method
  • Keyword: Dynamics
  • Keyword: Mechanical Vibrations
  • STI Subject Categories: 42 Engineering Not Included In Other Categories


  • Conference: American Institute of Aeronautics and Astronautics (AIAA)/American Society of Mechanical Engineers (ASME) structures, structural dynamics and materials conference, Salt Lake City, UT (United States), 15-17 Apr 1996


  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI


  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Article


  • Text


  • Other: DE96008136
  • Report No.: LA-UR--96-0306
  • Report No.: CONF-960424--3
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 219380
  • Archival Resource Key: ark:/67531/metadc668175


  • Display Note: OSTI as DE96008136