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A method for quickly acquiring high-speed impact extrusion resistance of a projectile

A technology of high-speed impact and acquisition methods, applied in instruments, biological neural network models, design optimization/simulation, etc., can solve problems such as time-consuming numerical simulation, shorten the overall solution time, preserve integrity and calculation accuracy, and improve scientific Research Efficiency and Scientific Effectiveness

Active Publication Date: 2019-04-30
西北机电工程研究所
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Problems solved by technology

[0008] The present invention proposes a method for quickly obtaining the resistance of projectile high-speed impact extrusion to solve the technical problem that the numerical simulation of the projectile extrusion process takes a long time

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  • A method for quickly acquiring high-speed impact extrusion resistance of a projectile
  • A method for quickly acquiring high-speed impact extrusion resistance of a projectile
  • A method for quickly acquiring high-speed impact extrusion resistance of a projectile

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Embodiment Construction

[0040] In order to make the purpose, content and advantages of the present invention clearer, the specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0041] The projectile extrusion process is a process in which the projectile gradually moves along the barrel and squeezes into the slope and the rifle. This process involves three nonlinear problems, including material nonlinear problems such as large deformation and large strain of the projectile material and damage failure. Geometric nonlinear problems such as large displacement and rotation during the movement of the projectile, and boundary condition nonlinear problems such as the contact between the projectile and the sloped rifling of the barrel. To solve and study the above problems, it is necessary to combine theory, cooperate with finite element numerical simulation method, and use nonlinear dynamics software L...

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Abstract

The invention belongs to the technical field of projectile motion analysis, and particularly relates to a method for quickly obtaining high-speed impact extrusion resistance of a projectile. Accordingto the method, a result obtained by carrying out extrusion process simulation through a finite element method is taken as a sample, and an agent model is constructed by utilizing a self-adaptive RBF(Radial Basis Function) neural network, so that rapid calculation of the high-speed impact extrusion resistance of the projectile at different initial extrusion speeds is realized. According to the method, the integrity and calculation precision of numerical simulation can be kept, the overall solving time can be greatly shortened, and the scientific research efficiency and scientificity are improved.

Description

technical field [0001] The invention belongs to the technical field of projectile motion analysis, and in particular relates to a method for quickly acquiring projectile high-speed impact extrusion resistance. Background technique [0002] The projectile extrusion process is a transient, nonlinear dynamic process, the mechanism of action between the projectile and the barrel is very complex, and there are many factors affecting the projectile extrusion process. Under normal circumstances, the extrusion process of the projectile can be described as: with the increase of the bottom pressure of the projectile, the projectile starts to move and squeezes into the barrel bore at a certain initial speed. , so the belt is gradually squeezed into the rifling, and the resistance increases continuously during the extrusion process. When the belt is completely squeezed into the rifling, the resistance reaches the maximum value. At this time, the belt is ground out of the groove and matc...

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Application Information

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IPC IPC(8): G06F17/50G06N3/02
CPCG06N3/02G06F30/20G06F2119/06Y02T90/00
Inventor 王亮宽第五强强马佳佳孙耀东
Owner 西北机电工程研究所
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