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A marine composite material propeller pre-deformation optimization method

A composite material and optimization method technology, applied in the direction of rotating propellers, rotary propellers, special data processing applications, etc., can solve the problems of not considering the pitch and pitch changes of the blades, and the propulsion efficiency of the composite propellers, etc., to save The effect of computing resources and time, small amount of computation, and simple computation

Active Publication Date: 2019-05-03
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the propulsion efficiency of the composite material propeller decreases due to the change of side tilt, pitch and pitch due to the deformation of the blade after fluid-solid coupling is not considered in the design process of the existing composite propeller, and provides a A pre-deformation optimization method for marine composite propellers; this method makes the propulsion efficiency of the pre-deformed composite propellers equal to rigid propellers under design conditions, and better than rigid propellers under non-design conditions, thereby broadening the scope of composite propellers. work efficient area

Method used

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  • A marine composite material propeller pre-deformation optimization method
  • A marine composite material propeller pre-deformation optimization method
  • A marine composite material propeller pre-deformation optimization method

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Embodiment 1

[0037] The fiber composite material marine propeller pre-deformation optimization method of the present embodiment is realized by the following steps:

[0038] Step 1: Based on the principle of coordinate transformation, the transformation formula from the local coordinate system to the global coordinate system of the HSP metal propeller blade section is deduced, such as formula (1). Through Matlab programming, the value of each blade cut surface at 0.2R-0.95R (R is the radius of the propeller) of the HSP propeller is converted to obtain a three-dimensional Cartesian coordinate point.

[0039]

[0040] Among them, x, y, z are the three-dimensional Cartesian coordinate values ​​of the HSP propeller, L i is the leading edge parameter; R i is the radius value corresponding to each leaf cut surface; (X, Y) is the value point of the leaf cut surface; is the pitch angle; β is the pitch angle.

[0041] Step 2: Import the 3D coordinate points of the HSP metal propeller obtained...

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Abstract

The invention relates to a marine composite material propeller pre-deformation optimization method, and belongs to the technical field of impeller mechanical simulation. The method comprises the following steps: establishing a composite material propeller finite element model; and carrying out bidirectional fluid-solid coupling calculation on the deformation values and a composite material propeller calculation fluid mechanics model, extracting deformation values of the characteristic points on each blade tangent plane in the coordinate direction based on a result, and reversely superposing the deformation values into a propeller coordinate conversion formula for pre-deformation processing to finally obtain the pre-deformation composite material propeller. According to the method, changesof geometric parameters such as propeller pitch angles, lateral inclination and longitudinal inclination caused by deformation of the composite propeller blades under the fluid-solid coupling effect are comprehensively considered, and the precision of pre-deformation design is improved. In addition, the method is high in universality and universality. Compared with an existing pre-deformation design method, the method has the advantages of being small in calculation amount, easy and convenient to calculate and capable of achieving parameterized and programmed design, and a large number of calculation resources and time are saved.

Description

technical field [0001] The invention relates to a pre-deformation optimization method for a marine composite material propeller, belonging to the technical field of impeller machinery simulation. Background technique [0002] Using composite materials instead of traditional metal materials to manufacture propellers can significantly improve its hydrodynamic performance and vibration characteristics. Through the design of the composite fiber layup and the improvement of the blade structure, the composite propeller can adaptively adjust the side tilt, pitch and pitch distribution according to the hydrodynamic load it bears to improve the hydrodynamic performance. At present, most marine fiber composite propellers use the type value of metal propellers, without considering the influence of the fluid-solid coupling effect of the propeller blades, and the composite propeller blades will deform during operation, resulting in a decrease in propulsion efficiency, which cannot meet t...

Claims

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Application Information

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IPC IPC(8): G06F17/50B63H1/26
Inventor 刘影张晶吴钦张汉哲黄彪
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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