Methodological foundations and results of practical application of the software package for modeling the rolling of the vessel on the PSPD

The abstract discusses the methodology of bumping a vessel on a transfer floating dock (TLFD) in the presence of one or two supports. The reasons are noted, which cause absence of special universal technique, containing detailed recommendations for development of projects of transfer floating docks and modeling of the process of ship bumping on a dock at various conditions of docking. The stages of ship rolling process are considered. It is specified that before vessel rolling operation, preliminary ballasting of dock is carried out to provide equilibrium landing on an even keel by means of: ballast to level the roll and trim; ballast to replace the vessel mass; ballast for surfacing from the supports. It is assumed that by the time the rolling starts, the dock is positioned on the supports. Necessary amount of clamping, run-in and maneuvering ballast is taken into the corresponding compartments. Permissible loads on the supports, maximum permissible value of bending moment from total longitudinal bending of the dock, permissible values of deflections of the dock hull at reference (control) points are determined. A general sequence of actions and computational justifications is formulated. It is a general algorithm, which can be the basis for an automated system for controlling the process of ship bending on the dock. Results of computer simulation of ship bumping at presence of two shore and bridge supports and only one shore support on the existing RAP are presented.