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Method for determining modal finite element simulation precision of mechanical part

A technology for mechanical parts and determination methods, applied in design optimization/simulation, special data processing applications, instruments, etc., can solve problems such as inaccurate comparison results and inability to define simulation accuracy, achieve accurate and reliable elastic-plastic data, and avoid calculation. The effect of excessive volume and accurate results

Inactive Publication Date: 2017-05-31
TONGJI UNIV
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Problems solved by technology

However, the existing verification results are often based on a single comparison between the simulation results and the experimental results. The comparison results are not accurate, and it is impossible to have a precise definition of the simulation accuracy.

Method used

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  • Method for determining modal finite element simulation precision of mechanical part
  • Method for determining modal finite element simulation precision of mechanical part
  • Method for determining modal finite element simulation precision of mechanical part

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Experimental program
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Embodiment Construction

[0047] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention, and provides a detailed implementation manner and a specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0048] like figure 1 As shown, this embodiment provides a method for determining the modal finite element simulation accuracy of a simple cantilever arm, including the following steps:

[0049] 1) Determine the material of the cantilever arm, prepare material splines and carry out spline experiments to obtain elastic-plastic data such as elastic modulus and stress-strain curves of multiple groups of materials. Tensile conditions, and finally 20 sets of tensile experiments were carried out;

[0050] 2) as figure 2 As shown, the design of experiments (DOE) method is used to ...

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Abstract

The invention relates to a method for determining modal finite element simulation precision of a mechanical part. The method comprises the following steps that a material sample strip is prepared on the basis of the material of the mechanical part, and a sample strip experiment is performed to obtain multiple groups of elastic-plastic data of the material; a test design method is applied to classify and select the multiple groups of elastic-plastic data of the material so as to obtain multiple groups of material parameters; corresponding modal finite element simulation is conducted on the mechanical part by applying the multiple groups of material parameters to obtain simulation results corresponding to each group of material parameters; according to the finite element model established in the modal finite element simulation, a physical experiment with same boundary conditions is performed to obtain physical experiment results; normal distribution analysis is conducted on the simulation results and the experiment results, and the modal finite element simulation precision is obtained through calculation according to normal distribution mean values of the simulation results and the experiment results. Compared with the prior art, the method has the advantages of being accurate in simulation precision definition, close to the actual situation and the like.

Description

technical field [0001] The invention relates to the field of mechanical finite element simulation, in particular to a method for determining the modal finite element simulation accuracy of mechanical parts. Background technique [0002] "Industry 4.0" is an important industrial national policy to cope with technological change and reshaping of the industrial pattern. The key part of its realization lies in the intelligence of design and manufacturing. The digital design capabilities and virtual simulation capabilities based on computer models are the foundation and guarantee of intelligent design and manufacturing. As an integrated product design and development method, digital design technology uses analytical models to replace actual physical systems in a high-performance computing environment, making product design and manufacturing processes intelligent, efficient, safe, and less constrained by the environment. New technology research and development capabilities have b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/23
Inventor 汪昌盛刘海江
Owner TONGJI UNIV
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