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Optimization algorithm-based shock absorber rigidity simulation method

A technology of stiffness simulation and optimization algorithm, which is applied in design optimization/simulation, instrumentation, calculation, etc., can solve the problems that cannot be directly modeled to obtain the finite element shock absorber model, and achieve fast calculation speed, simple simulation method, and save hardware Resource and Cost Effects

Active Publication Date: 2018-09-28
BEIHANG UNIV
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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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  • Optimization algorithm-based shock absorber rigidity simulation method
  • Optimization algorithm-based shock absorber rigidity simulation method
  • Optimization algorithm-based shock absorber rigidity simulation method

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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 an optimization algorithm-based shock absorber rigidity simulation method. The method comprises the following steps of: 1, establishing a corresponding physical model accordingto a geometric shape of a practical shock absorber; 2, partitioning finite element grids for the established model; 3, endowing the established shock absorber model with an orthotropic material attribute; 4, applying a fixed constraint to one end of the shock absorber and applying a unit load to the other end of the shock absorber, and carrying out finite element solution to obtain anisotropic rigidity of the shock absorber; and 5, carrying out optimization by taking an anisotropic elastic modulus of an orthotropic material as a design variable and aiming at enabling the anisotropic rigidity,obtained through finite element simulation, of the shock absorber is closest to anisotropic rigidity of a practical shock absorber, so as to accurately simulate rigidity of the practical shock absorber. According to the method, optimized material attributes are endowed with shock absorber finite elements, and finite element calculation is carried out on the whole engineering structures, so that more accurate solutions can be obtained.

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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IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 王磊熊闯石庆贺王晓军陈潇
Owner BEIHANG UNIV
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