The hydrodynamic excitation and response behavior of multi-body systems with
varying degrees of coupling presents many challenges for designers of offshore
structures. In this study, attention is focused upon the analysis and interpretation of
experimental data obtained for an unmanned deepwater mini-Tension Leg Platform
(mini-TLP) coupled to a tender barge. Each body has its own mooring system and the
bodies are connected by two breast lines extending from central points on the mini-TLP
to central points on the bow and stern of the tender barge. A fender system is located
between the two platforms. Thus the two floating bodies are constrained to move
together in surge and yaw while they are free to move independently in heave, roll and
pitch with some limitations on sway.
The data of the individual records are characterized using statistical moments,
including skewness and kurtosis, to examine the degree of non-Gaussian behavior.
Correlation analysis and cross spectral analysis are used to investigate the relationships
between selected measurements such as the motion of each vessel, tensions in the
mooring lines and tendons and the forces on the fenders. The analysis shows that the
coupling effects reduce the mooring line and tendon tensions significantly and that the
motions of the two vessels influence the line tensions and fender forces. The data
distribution patterns followed by the parameters and the corresponding extreme values
are also investigated.
| Identifer | oai:union.ndltd.org:tamu.edu/oai:repository.tamu.edu:1969.1/2608 |
| Date | 01 November 2005 |
| Creators | Girija Sasidharan Pillai, Harish |
| Contributors | Niedzwecki, John M. |
| Publisher | Texas A&M University |
| Source Sets | Texas A and M University |
| Language | en_US |
| Detected Language | English |
| Type | Book, Thesis, Electronic Thesis, text |
| Format | 2029858 bytes, electronic, application/pdf, born digital |
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