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Pavement structure multi-physical field coupling numerical simulation method based on finite element

A multi-physics field and pavement structure technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as deviations in analysis results and failure to comprehensively consider them, and achieve the effect of enriching applications

Active Publication Date: 2019-01-18
HEFEI UNIV OF TECH
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Problems solved by technology

[0003]The change of pavement structure pavement performance is often the result of multiple physical fields, including stress field, temperature field and hydraulic field, etc., which are not available in the prior art The analysis of the pavement structure considering the coupling of stress field, temperature field and hydraulic field will inevitably have deviations in the analysis results

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  • Pavement structure multi-physical field coupling numerical simulation method based on finite element
  • Pavement structure multi-physical field coupling numerical simulation method based on finite element
  • Pavement structure multi-physical field coupling numerical simulation method based on finite element

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Embodiment Construction

[0057] See figure 1 In this embodiment, the finite element-based multi-physics coupling numerical simulation method of the pavement structure is carried out in the multi-physics coupling finite element software as follows:

[0058] Step 1: Define the mechanical parameters, thermodynamic parameters and hydraulic parameters of the road material: mechanical parameters include Young's modulus, Poisson's ratio and density. For viscoelastic materials, it also includes viscoelastic parameters; thermodynamic parameters include thermal conductivity, specific heat capacity and thermal expansion Coefficient; hydraulic parameters include hydraulic conductivity, porosity and Biot elastic parameters. In addition, the variable α needs to be defined T , Α T It is the displacement factor of the principle of time-temperature equivalent, used to describe the relationship between relaxation time and temperature, and can be defined in the form of WLF equation: log 10 α T = C 1 T 2 +c 2 T+c 3 , Where ...

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Abstract

The invention discloses a pavement structure multi-physical field coupling numerical simulation method based on finite element, which comprises the following steps: defining mechanical, thermodynamicand hydraulic parameters; Defining vehicle loads and meteorological functions; Adding a solid mechanics module, applying a load and setting boundary conditions; Adding a porous medium heat transfer module, referring a weather function and setting boundary conditions; Adding Darcy's law module, referring a weather function and setting boundary condition; Adding a multi-physical field coupling module to couple the multi-physical fields; Calculating and performing post-processing analysis. The invention couples the stress field, the temperature field and the hydraulic field, and comprehensively studies the influence of multiple physical fields on the road performance. The invention has good guiding significance for the selection and analysis of the pavement structure.

Description

Technical field [0001] The invention relates to the numerical simulation of a pavement structure, and more specifically to a finite element-based multi-physics coupling numerical simulation method of the pavement structure. Background technique [0002] For a long time, the road performance of asphalt pavement has been one of the research hotspots in the field of road engineering. Researchers can easily analyze the pavement structure with the help of finite element software, thereby saving manpower and material resources. [0003] The changes in the road performance of the pavement structure are often the result of multiple physical fields, including stress field, temperature field and hydraulic field. The existing technology fails to comprehensively consider the coupling of stress field, temperature field and hydraulic field. Analysis, there must be deviations in the analysis results. Summary of the invention [0004] In order to avoid the above-mentioned deficiencies in the prior...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/23G06F30/13G06F2119/06Y02T90/00
Inventor 李凌林王忠源李文龙
Owner HEFEI UNIV OF TECH
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