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Project Number 33
Date of Summary March 31, 1984
Subject Vibration Monitoring of Offshore Structures
Performing Activity The Aerospace Corporation
Principal Investigator Dr. Sheldon Rubin
Contracting Agency Minerals Management Service
Estimated Completion Complete
Description This was a joint Industry Project (JIP). Frequency monitoring was applied to the Nondestructive Examination Method `Round Robin` (see Project No. 34). This program evaluated the applicability of several promising methods for locating structural failures. Projects Nos. 23 and 41 were also evaluated. Experiments were run on a 14 foot, four-legged jacket platform model at the NASA facility at Goddard. A new concept was developed called the Flexibility Monitoring Technique (FMT). The concept circumvents measuring harmonic frequencies necessary in conventional monitoring techniques. The new method takes advantage of the basic shear beam behavior of a fixed offshore platform. It has been evaluated on the `Round Robin` model, and several experiments will be conducted fixed platforms in the field.
Progress Complete
Reports
AA Rubin, S., Ambient Vibration Survey of Offshore Platforms, Engineering Division, ASCE, Volume 106, No. EM3, Proceedings Paper No. 15458, pp. 425-441, June 1980. (Out of print)
AB Coppolino, R. N., Rubin, S., Detectability of Structural Failures in Offshore Platforms by Ambient Vibration Monitoring, Proceedings of the 1980 Offshore Technology Conference, Volume IV, Paper No. 3,865, pp. 101-110, Houston, Texas, May 1980. (Out of print)
AC (125 pages) File in Adobe's Portable Document Format (PDF) . Rubin, S., Coppolino, R. N., Scale Model Nondestructive Examination (NDE) Round Robin Test, Frequency Response Method, Report No. ATR-82(2830)-IND, The Aerospace Corporation, December 1981.
AD (8 pages) File in Adobe's Portable Document Format (PDF) . Rubin, S., Coppolino, R. N., Flexibility Monitoring of Offshore Jacket Platforms, Proceedings of the 1983 Offshore Technology Conference, Volume II, Paper No. 4,535, pp. 201-208, Houston, Texas, May 1983.
AE (158 pages) File in Adobe's Portable Document Format (PDF) . Rubin, S., Coppolino, R. N., Flexibility Monitoring Evaluation Study, Report No. ATR-83 (3839)-2nd, The Aerospace Corporation, September 1983.
AF (189 pages) File in Adobe's Portable Document Format (PDF) . Rubin, S., Coppolino, R. N., OCS Instrumentation Monitoring Evaluation, The Aerospace Corporation, El Segundo, California, June 1979.
 

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