Detection of damage in a space truss using modal data

Hung-Shi Chen; Vernon C. Matzen

doi:10.1117/12.173951

1 May 1994 Detection of damage in a space truss using modal data

Hung-Shi Chen, Vernon C. Matzen

Proceedings Volume 2191, Smart Structures and Materials 1994: Smart Sensing, Processing, and Instrumentation; (1994) https://doi.org/10.1117/12.173951
Event: 1994 North American Conference on Smart Structures and Materials, 1994, Orlando, FL, United States

Abstract

A three-step damage detection procedure using modal data is developed for space trusses. The procedure is based on determining parameters associated with member stiffness matrices using a system identification technique. The first step is the refinement of the matrix using modal data from the undamaged structure. A modal residual vector is then used to determine whether or not damage has occurred. If it has, a minimization scheme is used to determine the parameters for only those members found to have been damaged. An eight-bay, hybrid-scaled truss designed and tested at NASA's Langley Research Center is used to verify the procedure. One damage case is used to illustrate the success of the procedure.

Citation Download Citation

Hung-Shi Chen and Vernon C. Matzen "Detection of damage in a space truss using modal data", Proc. SPIE 2191, Smart Structures and Materials 1994: Smart Sensing, Processing, and Instrumentation, (1 May 1994); https://doi.org/10.1117/12.173951

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