Ship line with stern transom plate and unbalanced rudder blade designing method

Abstract

The invention discloses a ship line with a stern transom plate and an unbalanced rudder blade designing method; the ship bottom shape at the mounting position of a ship body rudder blade is a conical ship body cyclogenesis plane; within a rotation angle range of the rudder blade, for a streamline rudder blade, the upper end surface of the rudder blade is a curved plane parallel to the ship body cyclogenesis curved plane; and for a flat-plate rudder blade, the upper end line of the rudder blade is a curved line parallel to the ship body cyclogenesis curved plane. According to the invention, coordination of characteristics, such as the ship line, a rudder blade line, a lower rudder bearing structure and the like, are sufficiently taken into consideration; and the ship line disclosed by the invention is used for various single-rudder ships or multi-rudder ships with the stern transom plates and semi-balanced or unbalanced rudders. According to the invention, within all rotation angle ranges of the rudder blade, the shape of the upper edge of the rudder blade and the shape of a ship bottom plate are always kept parallel, so that the clearance can be minimized and an optimal space is always kept; therefore, the rudder effect is effectively enhanced and can be enhanced by more than one time, so that the operability of the ship is improved and energy is saved.

Description

technical field [0001] The invention relates to a design method of a hull and rudder blades, in particular to a design method of a hull with a stern seal plate and an unbalanced rudder blade, which is suitable for single-rudder ships and multi-rudder ships with a stern seal plate and semi-balanced or unbalanced rudders. A rudder ship belongs to the technical field of ships. Background technique [0002] The maneuverability of the ship plays an important role in the overall performance of the ship and the quality of the ship's navigation performance, and the rudder plays a decisive role in the maneuverability of the ship. Therefore, how to improve the rudder efficiency has become one of the important issues studied by shipbuilders. It has long been recognized theoretically that the aspect ratio plays a decisive role in the rudder effect under the condition that the rudder area and rudder section remain unchanged. . However, due to the limitation of the ship's draft and wate...

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Problems solved by technology

However, this favorable factor can only be better reflected when the hull where the rudder blades are installed is flat. The leaf is a mechanism that can rotate around the center of the rudder stock, so the existing technology can only make the upper edge of the rudder and the bottom plate of the hull have a good coincidence state (that is, the gap is the smallest) at a certain corner of the rudder blade, so that the The rudder blade has a better rudder effect at this turning angle

For example, for a single-stern and single-rudder ship, at a rudder angle of 0°, the shape of the upper edge of the rudder blade can be parallel to the shape of the stern bottom plate and the gap can be minimized, so that the rudder effect is the best at this time, but when the rudder turns At a certain angle, in order to prevent the rudder blade from colliding with the hull or due to the shape of the hull itself, the parallel and close relationship between the shape of the upper edge of the rudder blade and the shape of the bottom plate of the hull must be lost. At this time, the gap becomes a scissors difference. reducing the rudder efficiency

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