Method for optimally selecting thighbone prostheses based on material performance multi-objective optimization

A multi-objective optimization, femoral prosthesis technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as no solution.

Inactive Publication Date: 2014-01-22
HARBIN UNIV OF SCI & TECH
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Problems solved by technology

In order to achieve multi-objective optimization of femoral...

Method used

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  • Method for optimally selecting thighbone prostheses based on material performance multi-objective optimization
  • Method for optimally selecting thighbone prostheses based on material performance multi-objective optimization
  • Method for optimally selecting thighbone prostheses based on material performance multi-objective optimization

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Experimental program
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Embodiment

[0106] 1. Optimizing the mechanical simulation of the ball head structure

[0107] Using zirconium-niobium alloy as the femoral prosthesis material, the mechanical simulation of the spherical head, ellipsoidal head, and cockle wire spherical head was carried out respectively. Figure 5 is the deformation distribution when the acetabular model is matched with three different shapes of femoral heads. When the spherical femoral head acts on the acetabular model, the maximum deformation of the acetabulum occurs at the center, and the deformation decreases with the increase of the radius, and the maximum deformation is 0.037435mm; the ellipsoidal femoral head acts on the acetabular model , the maximum deformation also occurs at the center of the sphere, and the maximum deformation is 0.024877mm; the cockle-line spherical femoral head is different, and the maximum deformation of the acetabular model occurs at the position away from the center of the sphere, indicating that the cockl...

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Abstract

The invention discloses a method for optimally selecting thighbone prostheses based on material performance multi-objective optimization, and relates to the field of thighbone prosthesis design. The method comprises the step of utilizing the finite element analysis method for conducting the multi-objective optimization on the thighbone prostheses so as to achieve optimal selection of individualized thighbone prosthesis. The method is characterized by comprising the steps of extracting a thighbone internal contour line and a thighbone external contour line, structurally designing a thighbone prosthesis handle, structurally designing a ball head, assembling a thighbone model and a prosthesis model, selecting thighbone prosthesis materials, establishing a finite element model, setting determined material parameters, constructing a material matching mode and loads, and optimizing evaluation indexes and multiple objectives. The material matching scheme of the ball head and the prosthesis handle is the optimal scheme obtained on the premise that the thighbone prosthesis bearing capacity, the thighbone prosthesis service life, the thighbone prosthesis stress shielding and thighbone prosthesis deformation are optimized under the individual thighbone mechanical environment, the problem of optimally selecting the artificial prostheses is solved by initially applying the fuzzy matter-element theory, and due to the introduction of the method, the multi-objective optimization design of the thighbone prostheses is achieved.

Description

technical field [0001] The invention relates to a method for optimizing a femoral prosthesis, and relates to the field of femoral prosthesis design. Background technique [0002] In the design of femoral prosthesis, the existing technology has not analyzed the mechanical properties of spherical artificial femoral head, ellipsoidal artificial femoral head and cockle-shaped artificial femoral head, and has not clarified the advantages and disadvantages of the above three structures; nor has individualized prosthesis The shank design is considered in conjunction with the preferred ball head structure design. The existing technology can only achieve single-objective optimization. According to the analysis results of material properties, the evaluation of various indicators such as the rated load of the prosthesis, the fatigue life of the prosthesis, the stress shielding rate of the prosthesis, and the maximum deformation of the prosthesis are respectively given, which cannot be ...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 王沫楠
Owner HARBIN UNIV OF SCI & TECH
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