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Material distribution optimization method for blade model

A material distribution and optimization method technology, applied in the field of structural dynamics, can solve the problems of poor smoothness of final design results and low optimization solution efficiency, and achieve the effect of shortening the design cycle and improving optimization efficiency

Pending Publication Date: 2022-06-28
HARBIN ENG UNIV
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Problems solved by technology

[0005] In order to solve the problems of low optimization solution efficiency and poor smoothness of the final design results in the above-mentioned prior art, the present invention provides a material distribution optimization method for blade models, which can be obtained by combining the isogeometric method with the heuristic evolutionary algorithm. The continuously changing optimized material distribution interface does not require further smoothing, which greatly improves the optimization efficiency and shortens the design cycle for the entire blade material optimization

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  • Material distribution optimization method for blade model
  • Material distribution optimization method for blade model
  • Material distribution optimization method for blade model

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Embodiment Construction

[0047] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0048] like figure 2 As shown in the figure, an initial blade model is established. The length, width and height of the blade are L=0.4m, b=0.2m, h=0.01m, and the radius is R=0.01m. h = 0.4 on the hub. Assuming that the material to be optimized for the blade model is a functionally graded material, Young's modulus E me =210GPa,E ce =390GPa, density ρ me =7850 / m 3 ,ρ ce =3960kg / m 3 , Poisson’s ratio μ me =μ ce= 0.3, the optim...

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Abstract

The invention discloses a material distribution optimization method for a blade model, and the method comprises the steps: constructing a blade model, and extracting the basic information of the blade model; constructing a non-uniform rational B-spline basis function based on basic information of a blade model and an isogeometric analysis method refinement strategy; performing interpolation calculation by using a non-uniform rational B-spline basis function to obtain material attributes of the blade model; based on material attributes of the blade model, analyzing vibration characteristics of the blade model to obtain a target function value; based on the objective function value and constraint conditions of material distribution optimization, obtaining a blade model fitness function value; iterative solution is carried out by utilizing an optimization algorithm program, fitness function values of the blade model are calculated and compared, an optimal design variable individual solution and an optimal material distribution optimization blade model are obtained, and material distribution optimization of the blade model is completed. By means of the method, the continuously-changing optimized material distribution interface can be obtained, further smoothing treatment is not needed, the optimization efficiency is greatly improved, and the design period of whole blade material optimization is shortened.

Description

technical field [0001] The invention relates to the field of structural dynamics, in particular to a material distribution optimization method for a blade model. Background technique [0002] In engineering, high-speed rotating machinery can be seen everywhere, and it is widely used in aero-engines, turbines and compressors. As an important work component of high-speed rotating machinery, the frequent vibration and failure of blades have become an important factor restricting the reliability of rotating machinery. Therefore, it has important theoretical and practical guiding significance to improve and improve the vibration characteristics of the blade model through the optimal design of the early blade. [0003] In recent years, most scholars' work on the optimal design of rotating blades is based on finite element simulation software. The finite element optimization method usually adopts the optimal parameterization method based on element discrete. The final optimizatio...

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Application Information

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IPC IPC(8): G06F30/17G06F30/23G06N3/00G06F111/10G06F119/14
CPCG06F30/17G06F30/23G06N3/006G06F2111/10G06F2119/14
Inventor 靳国永仲赛凤叶天贵黄秋实
Owner HARBIN ENG UNIV
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