Challenges in Deep Water Experiments: Hybrid Approach

[+] Author and Article Information
Carl Trygve Stansberg, Harald Ormberg, Ola Oritsland

MARINTEK, Trondheim, Norway

J. Offshore Mech. Arct. Eng 124(2), 90-96 (Apr 11, 2002) (7 pages) doi:10.1115/1.1464129 History: Received November 01, 2001; Revised December 01, 2001; Online April 11, 2002
Copyright © 2002 by ASME
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Illustration of FPSO moored in 3000 m water depth and the need for truncation in a laboratory model
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Available depth in MARINTEK’s Ocean Basin
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The balance between uncertainties related to truncation and to small scales (i.e., large scale factors)
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A hybrid verification procedure
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Example on numerical system modeling of FPSO for coupled analysis (from 26)
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Mooring line tension samples, 335 m system, Upper: Measured and reconstructed for truncated (167.5 m) system, Lower: Extrapolated and measured for full-depth system (from 20)
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Photo from 1:150 scaled tests with truncated 3000 m system
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Full depth 3000m mooring system compared to 1100 m truncation
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Upper: Full-depth and truncated (1100 m) mooring characteristics of 3000 m system; Lower: Line tension time series samples (from 3)
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Empirical and predicted surge drift force coefficients of FPSO (from 26)




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