A Parametric Modeling Method of Finite Element Mesh of Projectile with High Energy Beam Machining Rhombus Pattern

Abstract

The invention provides a parametric modeling method for a missile body finite element grid of a high-energy beam processing rhombic pattern, which comprises the following steps of: constructing a rhombic hexahedral grid by utilizing nodes, and finishing missile body grid division containing high-energy beam slot lines; Then, the front end face and the rear end face of the projectile body grid aresupplemented; Determining the number of units in the defect region of the high-energy beam slot line according to the proportional relation between the high-energy beam slot line and the radial direction and the circumferential direction of the projectile body; Secondly, respectively deleting regional grids of the high-energy beam slot line defect region along the circumferential direction and theradial direction 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, high-energy beam processing rhombic pattern projectile body finite element grid modeling with different geometrical characteristics can be realized, the method is simple and convenient, and the efficiency is high.

Description

technical field [0001] The invention relates to the technical field of ammunition, in particular to a parametric modeling method of finite element mesh of an ammunition for high-energy beam processing rhombus pattern. 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 processing diamond pattern means that the shape of the unit after high-energy beam notching is diamond, and it is necessary to calculate whether ...

AI Technical Summary

Problems solved by technology

However, due to the complex geometry of the high-energy beam rhombic groove of the projectile, 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 geometry of the diamond-shaped notch of the projectile, it is very time-consuming to establish the finite element mesh of the diamond-shaped notch of the projectile using commercial modeling software

First establish a 3D model of the diamond-shaped notched projectile, and then import it into the 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 notched grooves needs to be divided first, and then The mirror image is copied to other grooves, but if the angle of each groove is different, it cannot be mirrored directly, 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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