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New Techniques in Forced Vibration Testing

by Ziyad H. Duron, California Inst of Technology, Pasadena, CA, USA,
John F. Hall, California Inst of Technology, Pasadena, CA, USA,



Document Type: Proceeding Paper

Part of: Recent Advances in Structural Dynamics

Abstract:

Forced vibration testing is a well established technique as indicated by references 1 to 8. This paper describes a system for forced vibration testing developed over two years during work performed on dams. The focus of these tests is to investigate the dynamic interaction which takes place between the dam and foundation and between the dam and water. Accurate determination of response in a low signal to noise ratio environment were made. Such responses include motions near and beyond the dam-foundation interface and dynamic pressures in the reservoir. The data set includes complete frequency sweeps at a large number of stations. The volume of data generated necessitates the use of an automated data acquisition and processing system.

Subject Headings: Dam foundations | Vibration | Data analysis | Data collection | Dynamic response | Dynamic pressure | Symmetry

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