Validation of the SEADYN90 Cable Simulation Model Using a Three-Dimensional Cable Deployment Data Set

by Paul A. Palo, Naval Civil Engineering Lab, Port Hueneme, United States,
Linda C. Teragouchi, Naval Civil Engineering Lab, Port Hueneme, United States,
Maureen T. Smith, Naval Civil Engineering Lab, Port Hueneme, United States,



Document Type: Proceeding Paper

Part of: Civil Engineering in the Oceans V

Abstract:

This paper presents data from a full-scale, three-dimensional cable payout test and the corresponding numerical simulations using the SEADYN90 computer model. The experiment, which was conducted at the Atlantic Undersea Test and Evaluation Center (AUTEC), deployed 16 kilometers (km) of 1.68 centimeters (cm) diameter cable from a vessel that followed a predetermined course. The ship position, cable payout rate, current profile, and eleven cable trajectories were measured. The measured data were then inputed into SEADYN90 with minimal simplifications to insure that modeling errors could be distinguished from input errors. The qualitative and quantitative comparisons between the numerical and measured trajectories were considered excellent when a normal drag coefficient of 2.54?0.1 (typical of strumming) was used. The results demonstrate that SEADYN90 is capable of accurately modeling realistically complex test scenarios with stochastic current profiles, ship velocities, and payout rates.

Subject Headings: Cables | Computer models | Three-dimensional models | Errors (statistics) | Numerical models | Simulation models | Scale models

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