Complete Identification of the Roll Equation Using the Stationary Random Roll Response

Author: Haddara, Mahmoud R.

Source: Journal of Ship Research, Volume 50, Number 4, December 2006 , pp. 388-397(10)

Publisher: Society of Naval Architects and Marine Engineers (SNAME)

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Abstract:

A method is developed to predict the time series of the wave exciting moment per unit virtual mass moment of inertia using the stationary random roll response. The estimated variance and autocorrelation function of the excitation are compared with those obtained using numerically generated data. The agreement is excellent. The method was also applied to experimental data obtained using two ship models. The predicted autocorrelation function for the excitation was compared with the autocorrelation function of the wave height. The method predicts the form of the autocorrelation function accurately. The method lends itself to use aboard ships at sea without interrupting the mission of the ship. Results of this analysis can help in planning optimum ship routing.

Document Type: Miscellaneous

Publication date: 2006-12-01

More about this publication?

The Journal of Ship Research is a quarterly publication providing highly technical papers on applied research in hydrodynamics, propulsion, ship motions, structures, and vibrations. While the Journal requires that papers present the results of research that advances ship and ocean science and engineering, most contributions bear directly on other disciplines, such as civil and mechanical engineering, applied mathematics, and numerical analysis. High quality papers are contributed from the U.S., Canada and overseas, with representation from established authorities as well as new researchers.
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