Triangular-section power draft-increase ballast-free semi-submersible conveying ship

Abstract

The invention provides a triangular-section power draft-increase ballast-free semi-submersible conveying ship. The ship comprises a main ship body, a power draft-increase system and a control system. The main ship body comprises an upright rounded-triangular-cross-section parallel body, a flow inflow section and a flow removal section, the upright rounded-triangular-cross-section parallel body is designed in an optimized mode to adapt to underwater near-surface sailing, the flow inflow section and the flow removal section downward incline to a blunt bow and a conical stern respectively. The power draft-increase system is a multi-wing combined system, comprises board side fixed negative lift horizontal wings, a controllable main lift adjusting wing combined appendage and stern lift adjusting horizontal wings, and is used for adjusting vertical force of the ship body under various loading conditions to achieve the optimal semi-submersible draft. The control system comprises a variable wing type section forward-leaning upright column, an inward-leaning light invisible upper construction part, shallowly submerged piercing hydrofoils and a stern controllable vertical wing, and is used for controlling the course and stability of the ship body. The ship is novel in type and high in subsequent expansion performance, is a tool for navy land battle force hiding, quick delivery and emergency transport of special civil materials in a route, and has certain research and application value in military and civil fields.

Description

technical field [0001] The invention relates to a ship structure, in particular to a triangular cross-section power-increased submersible non-ballast water semi-submersible transport boat, which belongs to the field of high-speed composite ships. Background technique [0002] Since the end of the 20th century, various composite (hybrid) ship concepts have emerged continuously, and a new branch of the most innovative ship technology has been formed so far. From the traditional concept, because the technical requirements of ship speed and seakeeping are contradictory, and the same good seakeeping performance cannot be achieved at the same time at high speed and low speed, this has become a bottleneck restricting the development of high-performance ship design . "All sea weather" ships have become the forefront of ship design research. [0003] In order to realize the "all-sea" high-speed navigation of ships, the first thing to solve is the problem of wave resistance and seak...

AI Technical Summary

Problems solved by technology

Its disadvantages are: 1) the specially designed cross-section configuration is unconventional (such as NACA airfoil), complex in structure, unclear in airfoil parameters, and low in practical construction and application feasibility; the performance parameters of the airfoil section (such as lift coefficient, drag coefficient, and lift-to-drag ratio) have no advantages over existing conventional airfoils, and there is no data support for single and combined performance, which needs further research

2) The spatial positions of the multiple pairs of auxiliary diving wings overlap along the streamline, and the efficiency of the hydrofoil and the navigation stability are reduced; each of the hydrofoils has two movable flaps. The method is complex and the operating efficiency is low; a large number of complex flap structures make it difficult to ensure the strength of the hydrofoil structure and reduce reliability

3) The wave response and wave-making resistance of the horizontally wide and flat hull are relatively large when navigating near the water surface. In addition to the small length-to-diameter ratio and the longitudinal section configuration, the rapidity and stability of the submersible boat in the semi-submerged and surface states are relatively large. Poor seakeeping

4) According to the configuration of the longitudinal section of the hull, the two upper rudder surfaces of the horizontal steering rudder device are severely out of water on the water surface or in a semi-submerged state, the control ability is lost, the rudder effect of the diving ship is greatly reduced, and the maneuverability near the water surface is poor; The arrangement of the snorkel and periscope in the body is easy to interfere with the complex flap control mechanism, and the structural strength is not easy to guarantee

5) The diving boat has a high sensitivity to weight changes, and it is necessary to use ballast water to compensate for the consumption of oil and water to maintain a constant total weight in order to perform the so-called quick dive without injecting and discharging ballast water; the auxiliary diving wing relies on The lift adjustment capability of the flaps is single and limited, and it is impossible to quickly and efficiently control the navigation state under the condition of large weight changes (such as cargo loading and unloading); the space utilization rate of the hull is low, and it is not suitable to set up cargo compartments, and the diving boat cannot be used as an input vessel. Ship use

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