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

Abstract

The invention discloses a ship line with a stern transom plate and a balanced rudder blade designing method. The ship bottom at the mounting position of a ship body rudder blade takes the shape of a combined ship body cyclogenesis plane; the combined ship body cyclogenesis plane comprises a ship body cyclogenesis curved plane, a ship body cyclogenesis horizontal sector plane, a ship body cyclogenesis column plane and a ship body cyclogenesis column plane lower end surface; 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, 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, the operability of the ship is improved and energy is saved.

Description

technical field [0001] The invention relates to a hull profile and rudder blades, in particular to a design method for a hull profile with a stern seal plate and a balanced rudder blade, which is suitable for all types of single-rudder ships and multi-rudder ships with a stern seal plate and a balanced rudder. The 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 waterway, the aspe...

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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 also 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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