Composite material propeller layering angle optimization method based on multi-objective genetic algorithm

A multi-objective genetic and composite material technology, applied in the fields of genetic law, design optimization/simulation, calculation, etc., can solve the problems of relying on finite element software, lack of versatility, and large amount of calculation, so as to meet the requirements of flexible search process and objective function. low, the effect of improving accuracy and efficiency

Active Publication Date: 2020-07-24
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the existing optimization methods are too computationally intensive, rely too much on finite element software and are not universal

Method used

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  • Composite material propeller layering angle optimization method based on multi-objective genetic algorithm
  • Composite material propeller layering angle optimization method based on multi-objective genetic algorithm
  • Composite material propeller layering angle optimization method based on multi-objective genetic algorithm

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Embodiment 1

[0031] Take the SEIUN-MARU high-slope ship propeller (HSP) as an example, such as Figure 1-3 As shown, the method for optimizing the ply angle of the fiber composite marine propeller disclosed in this embodiment, the specific implementation steps are as follows:

[0032] Step 1: Establish a composite material propeller model based on the ACP module in the selected WorkBench platform, define the angles of each layer of the composite material laminate with the middle surface of the metal propeller blade as the symmetry center to complete the fiber composite material layup, and import the pressure of the metal propeller blade The surface and suction surface models are used to constrain the shape of the composite material layup, and finally the establishment of the finite element model of the composite material propeller is realized.

[0033] The fiber composite lay-up method includes unidirectional or braided lay-up method.

[0034] Step 2: Import the finite element model of th...

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Abstract

The invention discloses a composite material propeller layering angle optimization method based on a neural network, and belongs to the technical field of turbomachinery 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 composite material propeller finite element model and a composite material propeller computational fluid mechanics model to obtain a corresponding open water characteristic curve; adopting an orthogonal test design method to preprocess thelayering angle combination and the corresponding hydrodynamic performance data; establishing a multi-objective fitness function according to the obtained propulsion efficiency of the composite material propeller, and establishing a relationship between a laying angle and the propulsion efficiency; encoding the layering angle in an integer encoding mode to establish an initial population, achieving layering optimization of the composite material propeller based on a multi-objective genetic algorithm. The propelling efficiency and the thrust coefficient of the composite material propeller subjected to laying angle optimization meet the requirements of required working conditions, the service life of the propeller is prolonged, the hydrodynamic performance and the noise performance of the propeller are improved, energy is saved, and economic benefits are improved.

Description

technical field [0001] The invention relates to a method for optimizing the ply angle of a composite material propeller based on a neural network, in particular to a method for optimizing a ply angle that can maximize the propulsion efficiency of a composite material propeller of a ship, and belongs to the technical field of impeller machinery simulation. Background technique [0002] Traditional propellers are made of metal or alloy materials. There are problems such as poor damping performance, easy vibration and noise, easy cavitation, and easy fatigue damage, which directly affect the service life of the propeller and the survivability of military ships. Composite materials have the advantages of high damping, light weight, high strength, corrosion resistance, and strong designability, and can control structural deformation by changing the angle and method of fiber layup. Therefore, the use of composite materials to manufacture propellers is to improve its hydrodynamic p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06F30/17G06N3/12G06F119/14G06F111/10G06F113/26
CPCG06N3/126
Inventor 张晶吴钦曲毅黄彪王国玉
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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