Displacement pilot boat

Abstract

The invention discloses a displacement pilot boat. A bow (100) profile of the displacement pilot boat breaks through the traditional smooth type design thought and is a stepped type profile. According to the displacement pilot boat, a profile on the lower part (2) of a step is relatively thin, so that the quickness of the pilot boat can be improved; a profile on the upper part (1) of the step is thick, so that the damping function of buoyancy is enhanced when a bow sinks, and an aim of reducing the vertical acceleration magnitude of the bow is fulfilled; the thick profile on the upper part (1) and the thin profile on the lower part (2) are combined through a stepped plane (3) in a transitional mode; and the largest width of the stepped plane (3) at a stem is not more than 10cm and gradually reduced in the process of extending to a stern. Compared with the conventional displacement pilot boat with the smooth bow profile, the displacement pilot boat has the advantages that the vertical acceleration of the bow can be obviously reduced on the premise that the quickness is not greatly influenced.

Description

technical field [0001] The invention relates to the field of ships, in particular to a displacement pilot boat. Background technique [0002] The key factor that restricts the number of days that a port can be operated in a year is: whether the pilot boat can be used to safely send the pilot to the incoming ship under relatively high sea conditions. Among them, the key index to ensure the safe boarding of the pilot is: under the combined action of heave and pitch, the vertical acceleration value of the bow of the pilot boat generally does not exceed 0.4g. [0003] At present, pilot boats used in ports are mainly divided into two types: high-speed planing boats and displacement pilot boats. The high-speed planing boat has high operating efficiency (rapidity) and economical efficiency, but it has strict requirements on sea conditions, and its availability is very low, and it cannot solve the problem of picking up and dropping off pilots under high sea conditions; although dis...

AI Technical Summary

Problems solved by technology

However, the bow moldings currently used in shipbuilding are all "smooth" moldings. In other words, the molding of the part above the waterline at the bow of a "fat" pilot boat is conducive to reducing the pitch of the pilot boat and lowering the pressure of the bow. vertical acceleration, but at the same time, the adverse effect is that it will also "fat" the shape of the part below the waterline at the bow of the pilot boat, thereby increasing the resistance of the pilot boat's navigation, which is unfavorable to the speed of the pilot boat influences

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