Measurement of Bottom Structure Deformation Due to Grounding or Beaching on an Unimproved Shore: A Full-Scale Experiment

摘要

Studying the process of hull interaction with the seabed is necessary to improve the reliability of ship hull structures when beached on an unimproved shoreline. The pressure the bow of a landing craft experiences during beaching operations is affected by a variety of factors that must be understood to develop a general theory of the hull to ground interaction. Currently the rules of classification society Det Norske Veritas (DNV) have an established formula for calculating the pressure on the bow of a landing craft, due to ground contact, see Ref. 1. The DNV formula uses the vessel displacement and contact area to determine the pressure experienced, by the hull structure, however, the characteristics of the hull and the shoreline must also be considered to analyse the interaction fully. The shape and coefficient of friction of the hull in the contact region as well as the load bearing properties, and slope angle, of the shoreline soil and vessel speed, at grounding, must be accounted for along with the hull displacement to achieve this.