Demihull-adjustable trimaran

Abstract

The invention provides a demihull-adjustable trimaran. The demihull-adjustable trimaran comprises a main hull and two demihulls. One side of each demihull is connected with one side of the main hull,the two demihulls can move in the hull direction of the main hull so as to change the positions of the demihulls relative to a hull of the main hull, and the two demihulls can rotate around the main hull so that the transverse width of the demihull-adjustable trimaran can be changed. The resistance influence of wave making interference between the main hull and the demihulls on the demihull-adjustable trimaran can be reduced, when the navigation speed is low, the demihulls are placed in the positions near the middle portion of the main hull, wave making resistance can be reduced, and influenceof heave and pitch motion can be reduced; when the navigation speed is high, the demihulls should be placed at a stern of the main hull; and the width of the demihull-adjustable trimaran is reduced to a great degree, the working range of the demihull-adjustable trimaran is enlarged, and especially, the demihull-adjustable trimaran can pass through a narrow channel conveniently.

Description

technical field [0001] The invention relates to the technical field of ship machinery, in particular to an adjustable trimaran. Background technique [0002] A trimaran is composed of three hulls, namely a main body and two hulls. The plates on both sides can be regarded as appendages, whose displacement only accounts for less than 10% of the total displacement, and the length of each plate is less than one-third of the total length of the hull. The plates can improve the stability and seakeeping of the ship. And favored by people. The hull layout of the trimaran has a great influence on the kinematic performance of the hull. However, the relative position between the hull and the main hull of the existing trimaran is mostly fixed, or only the stretching of the hull is possible. It does not have the ability to move forward and backward along the hull, thereby limiting the drag reduction advantage of the trimaran to a certain extent; on the other hand, the conventional prop...

AI Technical Summary

Problems solved by technology

The hull layout of the trimaran has a great influence on the kinematic performance of the hull. However, the relative position between the hull and the main hull of the existing trimaran is mostly fixed, or only the stretching of the hull is possible. It does not have the ability to move forward and backward along the hull, which limits the drag reduction advantage of the trimaran to a certain extent; on the other hand, the conventional propeller is basically used in the propulsion mode of the hull, which reduces the maneuverability of the hull

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