A Parametric Modeling Method of Flat Finite Element Mesh for High Energy Beam Machining Rhombus Pattern

Abstract

The invention provides a panel finite element mesh parametric modeling method for high-energy beam processing of a rhombic pattern, which comprises the following steps: constructing a rhombic hexahedral mesh by using nodes, and finishing panel mesh division containing high-energy beam slot lines; Then, supplementing the four end faces of the periphery of the flat grid; Determining the number of units in the defect region of the high-energy beam trough line according to the proportional relation between the high-energy beam trough line and the flat plate in the width direction and the height direction; Secondly, respectively deleting regional grids of the high-energy beam slot line defect region along the width direction and the height direction of the flat plate to complete modeling; And finally, outputting the node and unit information of the grid according to the format requirement of the finite element software. According to the method, flat finite element grid modeling of high-energy beam processing rhombic patterns with different geometrical characteristics can be realized, the method is simple and convenient, the efficiency is high, and the bullet supply body performs intensity analysis.

Description

technical field [0001] The invention relates to the technical field of ammunition, in particular to a parametric modeling method of flat finite element grids for machining rhombic patterns with high-energy beams. Background technique [0002] In order to improve the power of the warhead, the high-energy beam pre-control technology can make the projectile body obtain pre-controlled fragments with relatively consistent shape and quality under detonation loading, thereby improving the power of the warhead. The high-energy beam pre-control technology uses high-energy beams such as electron beams, laser beams, or ion beams to rapidly heat the material locally to a molten state, and the projectile rapidly cools the melted metal, forming regional units on the projectile to control the fragmentation of the projectile. High-energy beam diamond groove means that the unit shape of the high-energy beam groove is rhombus. When designing the high-energy beam diamond-shaped notch of the p...

AI Technical Summary

Problems solved by technology

However, due to the complex geometric shape of the high-energy beam diamond-shaped groove on the flat plate, the composition of the high-energy beam processed area is complex, including the melting zone, transition zone and defect zone, such as figure 1 shown

[0003] However, due to the complex geometric shape of the flat rhombic groove, it is very time-consuming to establish the finite element mesh of the flat rhombic groove using commercial modeling software

First establish a 3D model of a diamond-shaped grooved plate, and then import it into finite element software for meshing. Generally, tetrahedral meshing is used, and the accuracy is not high; if a hexahedral mesh is used, one of the grooves needs to be divided first, and then mirrored Copy to other grooves, but if the angle of each groove is different, it cannot be directly mirrored, and it needs to be re-divided, and the steps are cumbersome

In addition, if you need to change the feature size of the groove, you need to re-divide the finite element mesh. A large number of repetitive operations in modeling are cumbersome and error-prone, which seriously affects the design efficiency

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