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Three-dimensional model gradient finite element solving method based on ANSYS parametric design language

A parametric design and three-dimensional model technology, applied in the field of finite element simulation, can solve time-consuming and labor-intensive problems, and achieve the effect of improving calculation speed

Active Publication Date: 2017-12-29
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0004] Aiming at the problem that there are only temperature gradient results in the existing ANSYS post-processing, and the common gradient solution method requires secondary solution, which is time-consuming and laborious, the present invention provides a 3D model gradient finite element solution method based on ANSYS parametric design language. The purpose is to use the ANSYS parametric design language to realize the one-time fast solution of the gradient value of the unit in the post-processing process

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  • Three-dimensional model gradient finite element solving method based on ANSYS parametric design language
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  • Three-dimensional model gradient finite element solving method based on ANSYS parametric design language

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[0024] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0025] figure 1 It is a schematic diagram of the SOLID5 unit in the embodiment of the present invention. The unit includes eight nodes, numbered I, J, K, L, M, N, O, and P respectively. The corresponding local coordinates are (1,-1,-1),(1,1,-1),(-1,1,-1),(-1,-1,-1),(1,-1 ,1),(1,1,1),(-1,1,1),(-1,-1,1). Its shape function is:

[0026]

[0027] Where i is the node number.

[0028] figure 2 It is a sch...

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Abstract

The invention belongs to the field of finite element simulation and discloses a three-dimensional model gradient finite element solving method based on an ANSYS parametric design language. The method mainly comprises the steps of preprocessing a model; setting a solver and performing solving; extracting a target variable and node natural coordinates; solving a shape function derivative matrix; solving a Jacobi column matrix; solving an inverse matrix of the Jacobi column matrix; calculating an interpolation point variable gradient; and obtaining a unit solution of unit gradient value integration. Through the method, the defects of data export, secondary solving and time and labor waste of similar problems are avoided, quick solving of a gradient value in an after-processing process is realized, and calculation time can be substantially shortened.

Description

Technical field [0001] The invention belongs to the field of finite element simulation, and more specifically, relates to a gradient finite element solution method for a three-dimensional model based on ANSYS parameterized design language. Background technique [0002] Finite element simulation analysis is an important means of scientific research and engineering design. Among many finite element software, ANSYS is widely used. Among them, the parametric design language (ANSYS Parametric Design Language, APDL) is designed for users based on specific models. Further development offers possibilities. [0003] The post-processing of the finite element has provided rich results. However, there are still a lot of data that are not directly provided by post-processing. Some results can be obtained by simple calculations of data provided by post-processing, but there are still some results that need to be solved by complex finite element theory. In some special simulation analysis, it i...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 廖广兰谭先华邵杰史铁林汤自荣孙博林建斌陈科鹏
Owner HUAZHONG UNIV OF SCI & TECH
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