<p class="MsoNormal">The behavior of a floating structure results from the mechanics of its, more or less, rigid body and the hydrodynamic forces acting on it. Designing any floating structure, it is important to understand the behavior of this interaction and its influence on the movements of the structure. Particularly for ships, as long and slender bodies, the axis of roll and its vertical position is of special importance. It is around this axis that the lowest lateral accelerations in roll motion occur, which is not only weakly damped but also easily stimulated due to the relatively low mass moment of inertia around the ship’s longitudinal axis. With the intention of clarifying some widespread misconceptions about the location of this axis, full scale measurements have been carried out using a set of two mobile Inertial-Measurement-Units. The Inertial-Measurement-Units were placed on different heights. One above and one below the assumed location of the axis of rotation. Therefore, the measurements of the two Inertial-Measurement-Units can not only be used to improve the measurements of each other, but the plausibility of the results can be proven by the phase differences in the measured signals. Based on the measured accelerations and angular velocities, the average vertical location of the axis of the roll motion for small angles is determined and presented in this paper.</p>

Determination of the Vertical Location of the Roll Axis From Full-Scale Measurements

Paper Proceedings: https://asmedigitalcollection.asme.org/OMAE/OMAE2021/volume/85116

OMAE 2021

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