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A Stiffness Simulation Method of Shock Absorber Based on Optimal Algorithm

A technology of stiffness simulation and optimization algorithm, applied in design optimization/simulation, special data processing applications, etc., can solve the problems that cannot be directly modeled to obtain the finite element shock absorber model, and achieve fast calculation speed, easy implementation, and hardware saving Resource and Cost Effects

Active Publication Date: 2021-10-01
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when performing static analysis of the structure, it is impossible to directly model the finite element shock absorber model with the same isotropic stiffness as the actual shock absorber

Method used

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  • A Stiffness Simulation Method of Shock Absorber Based on Optimal Algorithm
  • A Stiffness Simulation Method of Shock Absorber Based on Optimal Algorithm
  • A Stiffness Simulation Method of Shock Absorber Based on Optimal Algorithm

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Embodiment 1

[0038] In order to fully understand the characteristics of the invention and its applicability to engineering practice, the invention simulates the stiffness of the shock absorber of the liquid cooling source system on an aircraft. In order to ensure the stability of the liquid cooling source, 4 shock absorbers are installed on the liquid cooling source. However, when performing finite element static simulation, it is necessary to accurately simulate the stiffness of the shock absorber. It is known that the isotropic stiffness of the shock absorber is K x =22N / mm,K y =22N / mm,K z =88N / mm. The optimization method is used to simulate the stiffness of the shock absorber, and the optimization is listed as:

[0039]

[0040] Among them, E 1 ,E 2 ,E 3 ,v 12 ,v 23 ,v 13 ,G 12 ,G 23 ,G 13 is the material parameter of the orthotropic material of the shock absorber; K' x ,K' y ,K' z is the isotropic stiffness obtained from the finite element solution.

[0041] The fin...

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Abstract

The invention discloses a vibration damper stiffness simulation method based on an optimization algorithm. First, the corresponding physical model is established according to the geometric shape of the actual shock absorber; second, the finite element mesh is divided into the established model; third, the established shock absorber model is given orthotropic material properties; third Fourth, a fixed constraint is applied to one end of the shock absorber, and a unit load is applied to the other end, and the finite element solution is carried out to obtain the anisotropic stiffness of the shock absorber; finally, the design is based on the elastic modulus of the orthotropic material in each direction. Variables, the optimization goal is to optimize the anisotropic stiffness of the shock absorber obtained by finite element simulation and the actual shock absorber stiffness, so as to accurately simulate the stiffness of the actual shock absorber. The optimized material properties are given to the finite element of the shock absorber, and the finite element calculation of the overall engineering structure can be performed to obtain a more accurate solution.

Description

technical field [0001] The invention relates to a method for simulating the stiffness of a shock absorber, in particular to a method for simulating the stiffness of a shock absorber based on an optimization algorithm. Background technique [0002] In order to improve the operating life and reliability of equipment, the design of shock absorbers has become the focus of mechanical design. The design of a shock absorber requires an important consideration of its stiffness characteristics. The ability of a structure to resist deformation under the action of an external force is the stiffness, that is, the external force required to cause a unit displacement. [0003] In practical engineering applications, the existing shock absorber model is often selected, which can give the stiffness of the shock absorber in all directions. However, in the static analysis of the structure, it is impossible to directly model the finite element shock absorber model with the same isotropic stif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23
CPCG06F30/23
Inventor 王磊熊闯石庆贺王晓军陈潇
Owner BEIHANG UNIV
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