A substructuring method for model updating and damage identification

Yong Xia, Shun Weng, You Lin Xu

Research output: Journal article publicationConference articleAcademic researchpeer-review

6 Citations (Scopus)


Model updating of large-scale structures is time-consuming as the global system matrices need to be assembled continuously and the global eigensolutions and eigensensitivities are required in each iteration, even only a few elemental parameters need updating. In this paper, a substructuring approach is proposed to extract the substructural dynamic flexibility matrices from the measured modal properties of the global structure under the constraints of force compatibility and displacement compatibility. Thereafter the focused substructure is treated as an independent structure and updated directly using the traditional model updating method. It not only reduces the size of the analytical model involved in model updating but also decreases the uncertain parameters that need updating, thus resulting in a rapid convergence of the optimization process. Moreover, if a particular substructure needs updating the measurement can be focused on the local area of the interested substructure only and the requirement of measurement on the entire structure is avoided. A laboratory tested frame structure is employed to illustrate the effectiveness and accuracy of the proposed method.
Original languageEnglish
Pages (from-to)3095-3103
Number of pages9
JournalProcedia Engineering
Publication statusPublished - 25 Oct 2011
Event12th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC12 - Hong Kong, Hong Kong
Duration: 26 Jan 201128 Jan 2011


  • Damage identification
  • Large-scale structures
  • Modal flexibility
  • Model updating
  • Substructuring method

ASJC Scopus subject areas

  • General Engineering


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