Finite element mesh generation method for honeycomb sandwich panel with pit defects

A pit defect and grid generation technology, applied in image data processing, 3D modeling, instruments, etc., can solve problems such as surface core desoldering, and achieve the effect of improving modeling efficiency

Pending Publication Date: 2022-02-08
中国空气动力研究与发展中心设备设计与测试技术研究所
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Problems solved by technology

However, external forces generated during manufacturing, assembly, transportation, etc. may create various defects inside the metal honey...

Method used

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  • Finite element mesh generation method for honeycomb sandwich panel with pit defects
  • Finite element mesh generation method for honeycomb sandwich panel with pit defects
  • Finite element mesh generation method for honeycomb sandwich panel with pit defects

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Embodiment Construction

[0031] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] Suppose the main dimensions of a honeycomb sandwich panel with pit defects are: the total length L is 150mm, the total width W is 60mm, the total height H is 8mm, and the honeycomb side length is l 0 8.66mm, cell height h 07mm, grid seed number n 0 6, pit diameter d 0 30mm, pit depth d 1 1mm.

[0033] S1. Calculate the number of honeycombs in the length and width direction of the honeycomb sandwich panel;

[0034] Calculation (L-2l 0 ) / (3l 0 ) and rounded to get n x =5, then the number of cells in the longitudinal direction is 2n x +1=11; calculate and rounded to get n y =4, the number of cells in the width direction is 4.

[0035] S2. Construct the geometric model of various components of the honeycomb sandwich panel;

[0036] Decompose the honeycomb sandwich panel into three basic components, which are right tria...

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Abstract

The invention discloses a finite element mesh generation method for a honeycomb sandwich panel with pit defects. The finite element mesh generation method comprises the following steps: calculating the number of honeycombs of the honeycomb sandwich panel in length and width directions; constructing geometric models of various components of the honeycomb sandwich panel; generating a geometric model of the honeycomb sandwich panel; generating a honeycomb sandwich panel finite element mesh model; generating a pit defect; and acquiring a finite element mesh model of the honeycomb sandwich panel with the pit defect. According to the finite element mesh generation method, the finite element mesh model of the corresponding honeycomb sandwich panel can be automatically constructed as long as the boundary dimension of the honeycomb sandwich panel with the pit defect is given; as long as pit defect parameters are given, the finite element mesh model of the corresponding honeycomb sandwich panel with the pit defect can be automatically constructed; and thus, technical support can be provided for efficiently carrying out comparative analysis work on the influence of different pit defect parameters on the mechanical properties of the honeycomb sandwich panel, and the method is particularly suitable for being applied to mechanical property evaluation of the honeycomb sandwich panel with the pit defect.

Description

technical field [0001] The invention belongs to the technical field of finite element grid generation, and in particular relates to a finite element grid generation method for a honeycomb sandwich panel with pit defects. Background technique [0002] Metal honeycomb sandwich panels have excellent mechanical properties and are widely used in the aerospace field. However, external forces generated during manufacturing, assembly, transportation, etc. may create various defects inside the metal honeycomb sandwich panel, such as pit defects, surface core desoldering defects, etc., among which pit defects are the most common One of the flaws. Accurately and efficiently obtaining the influence of pit defects on structural mechanical properties is of great significance for the optimal design and reusable evaluation of metal honeycomb sandwich panels. Therefore, it is necessary to find a finite element mesh generation method that can efficiently construct honeycomb sandwich panels ...

Claims

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Application Information

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IPC IPC(8): G06T17/20
CPCG06T17/20
Inventor 蒋国庆张浩马斌陈万华廖文林
Owner 中国空气动力研究与发展中心设备设计与测试技术研究所
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