A Comprehensive Sensitivity Analysis of the OTS Data
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The Ocean Test Structure (OTS) data obtained by the Exxon Production Research Company were re-analyzed in terms of their sensitivity to disturbances imposed on the measured forces, velocities, and accelerations. It has been shown that part of the scatter in the said data may be explained in terms of these disturbances. Furthermore, a correlation has been sought between the force coefficients and the relative current velocity and it has been demonstrated that a reasonable correlation exists between the drag coefficient, relative current velocity, Keulagan-Carpenter number, and the ratio of the Reynolds number to the Keulegan-Carpenter number. The results have confirmed the fact that the drag coefficients obtained from tests in an ocean environment must be necessarily smaller than those obtained in a controlled laboratory environment.
Author Ibrahim Cakal is an December 1982 NPS GraduateThis paper was presented at the 15th Annual OTC in Houston, Texas, May 2-5. 1983.
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