Investigations and Tests to Determine Hydrodynamic Forces and Moments on Ships Moored in a Current. Volume 1

摘要

This work consisted of an extensive series of experiments with ship models that were either fixed or moored in a current in shallow water. The experiments were designed to shed light on apparent contradictions in published data on the hydrodynamic force coefficients and to provide data for two ships moored side by side. The objectives of Phase I, which experiments with a single model, were to test the effect of the Reynolds number, define the effect of the width of the flume, and investigate the potential for ship motions in the shallow water. Phase II consisted of 116 experiments with one vessel and with two vessels side by side, using both fixed models and models restrained by elastic moorings. Phase II objectives were: 1) To determine the horizontal force components as functions of time and as time averages for one vessel and for two vessels in various positions and flow conditions. 2) To discover and define significant details of the flow around the ships(s) with the intent to further develop the understanding of the hydrodynamics of the actual situation. and 3) To investigate limiting conditions, which mark the transitions between negligible vessel motion and instability-type oscillations.