In this paper, we present the results of an investigation of significant damping effects and the ability to locate damage. A three-bay, vertically cantilevered laboratory truss testbed was developed to exhibit beam-like response for the first three modes (a pair of first bending modes in orthogonal directions and a torsional mode). Truss members were removed from the testbed to simulate various damage scenarios with reduced stiffness. In addition, up to four visco-elastic damping struts were placed in the truss testbed in various configurations to affect the damping of certain modes of the structure. A comprehensive test matrix of damping and damage effects was designed and completed to construct the data base for the damping and damage identification evaluations. Two representative visco-elastic struts were also tested individually to determine their stiffness and damping characteristics. The damage detection process used the differences between pre- and post-damage vibration characteristics, along with a structural model, to successfully locate and quantify the extent of structural damage in all cases. Damping matrix models were also identified and evaluated.
|Title of host publication||16th Biennial Conference on Mechanical Vibration and Noise|
|State||Published - 1997|
|Event||ASME 1997 Design Engineering Technical Conferences, DETC 1997 - Sacramento, United States|
Duration: Sep 14 1997 → Sep 17 1997
|Name||Proceedings of the ASME Design Engineering Technical Conference|
|Conference||ASME 1997 Design Engineering Technical Conferences, DETC 1997|
|Period||9/14/97 → 9/17/97|
Bibliographical noteFunding Information:
The first two authors efforts were partially supported by McDonnell Douglas Aerospace, Houston, TX. The authors would like to thank Alex Chapman, a University of Kentucky undergraduate student, for his work in testing the truss and performing the modal identification. The authors also acknowledge the work of Raul Blanco, a University of Houston Masters student, who performed the individual strut tests and analysis.
© 1997 American Society of Mechanical Engineers (ASME). All rights reserved.
Copyright 2021 Elsevier B.V., All rights reserved.
ASJC Scopus subject areas
- Mechanical Engineering
- Computer Graphics and Computer-Aided Design
- Computer Science Applications
- Modeling and Simulation