ABSTRACT

This paper shows the motions of pleasure boats and floating piers which were measured using 1/20 scale hydraulic model tests. Both single rectangular and comb-shaped floating piers models were used. The motions of floating piers and pleasure boats were also analyzed using a three-dimensional source distribution method, taking into account the effects of the hydrodynamic interaction between floating bodies and mooring forces acting on mooring components connecting floating bodies.

INTRODUCTION

Nowadays, the planning and construction of pleasure boat marinas are promoted in Japan. Most of these facilities are constructed in calm areas that are well sheltered by a bay or peninsula, but some are planned in areas where ocean waves can enter easily. In the design of floating piers at marinas, it is therefore important to consider not only the motions of both floating piers and pleasure boats, but also the bending moments and shear forces in the floating piers. The motions of pleasure boats and floating piers were first measured using 1/20 scale hydraulic model tests. Both single rectangular and comb-shaped floating piers models were used. The effects on both floating pier and pleasure boat motions and on the strains in the floating piers due to differences in the rigidity of the floating piers, in the floating pier mooring conditions, and in the presence of pleasure boats at a pier were then determined. The motions and wave forces of floating piers and pleasure boats were then analyzed using a three-dimensional source distribution method (Faltinsen, 1974, Garrison, 1978) that includes the hydrodynamic interaction between floating bodies. Time domain analysis were carried out taking into account not only mooring forces, but also connecting tbrces that act on mooring components connecting floating bodies.

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