Sensitivity of Flexibility Monitoring of Offshore Jacket Platforms

[+] Author and Article Information
S. Rubin, R. N. Coppolino

The Aerospace Corporation, Segundo, Calif.

J. Energy Resour. Technol 108(1), 72-76 (Mar 01, 1986) (5 pages) doi:10.1115/1.3231244 History: Received October 25, 1984; Revised July 12, 1985; Online October 22, 2009


Flexibility monitoring is a vibration-based method for simplifying the detection of major underwater damage on offshore jacket platforms. Ambient vibrations are detected at each of the underwater framing levels relative to abovewater vibration in the fundamental sway and torsional modes. Derived are flexibility parameters which relate to the shear flexibilities of each framing bay and of the foundation. Great promise has been shown by laboratory and field testing. This paper presents a comprehensive sensitivity assessment for severance of diagonal members over a wide range of structural redundancy for generic platform configurations.

Copyright © 1986 by ASME
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