Author: S.G. Zhivitsa
Abstract
The article presents a generalized scheme for calculating accelerations at an arbitrary point of the ship in the inertial and fixed to the moving ship frames of reference with known parameters of its motions. A practical formula for calculating the acceleration at any ship's point has been proposed, taking into account the influence of gravity when modeling the motion of a ship in irregular waves in the frequency domain. A comparative analysis of the amplitudes and modes of oscillations of vertical and transversal accelerations at an arbitrary point of the ship have been made where they were calculated using exact and approximate formulae. The article describes the main present seakeeping criteria using acceleration at characteristic points of the ship's hull as a basis, which allow for quantifying the impact of ship motions on the crew and passengers.
Keywords: ship motions in waves, accelerations at the point of the ship, seakeeping criteria, motion sickness index, work interruption index, second generation dynamic stability criteria.
References
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About author:
S.G. Zhivitsa, PhD, Krylov State Research Centre, St. Petersburg
Issue: 68/69 (2022)
For citation: S.G. Zhivitsa. Accelerations due to ship motion in waves and their consideration in ship seakeeping assessment. Research Bulletin by Russian Maritime Register of Shipping. 2022, No. 68/69, pp. 20-33.
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