Method for predicting penetration performance of high-speed impact concrete of projectile body considering erosion effect

Abstract

The invention relates to a method for predicting penetration performance of high-speed impact concrete of a projectile body considering an erosion effect, and belongs to the field of impact dynamics.By combining two mechanisms of projectile body surface melting and aggregate cutting, the projectile body high-speed impact concrete penetration performance prediction method coupled with two projectile body erosion mechanisms is provided, and erosion and projectile body motion parameter evolution in the projectile body high-speed penetration process are effectively predicted; according to the method, the projectile body surface melting caused by projectile target friction heat and the cutting effect of hard particles on the projectile body surface in the projectile body penetration process are considered, the combined action of multiple erosion mechanisms obtained through experimental observation is fully considered, and the bottleneck of a traditional prediction method considering a single erosion mechanism is broken through. By means of the prediction method, high-precision prediction of the penetration performance of the high-speed impact concrete of the projectile body can be achieved, and key technical support is provided for structural design of the high-speed penetration drilling projectile and evaluation of the concrete protection performance.

Description

technical field [0001] The invention relates to a method for predicting the penetration performance of projectile high-speed impact concrete in consideration of erosion effect, belonging to the field of impact dynamics. Background technique [0002] Quite a number of experiments have shown that even if the impact velocity is lower than the semi-fluid conversion velocity, the projectile body will still have obvious mass loss and bullet passivation, and as the initial impact velocity increases, the mass erosion phenomenon will become more serious, and It will seriously affect the penetration performance of the projectile. Through the observation of the remaining projectiles after the test, some remaining projectile heads are blunted into approximately hemispherical shapes, and even a mass loss of up to 7.0% occurs. Such severe erosion of projectiles will inevitably affect the penetration performance of projectiles, especially for projectiles with high initial impact velocity ...

AI Technical Summary

Problems solved by technology

[0004] In view of the deficiencies in existing methods: (1) rely on existing experimental rules (2) existing prediction methods fail to fully reflect the real physical situation of the joint action of multiple erosion mechanisms; the purpose of the invention is a method that considers erosion effects The prediction method of projectile high-speed impact concrete penetration performance breaks through the framework of the traditional single-mechanism erosion algorithm by coupling projectile surface melting and hard particles cutting the projectile, which are the main mechanisms of projectile erosion, and effectively predicts projectile erosion. Erosion during the high-speed penetration process and the evolution of projectile motion parameters can provide key technical support for the structural design of high-speed penetration ground-penetrating projectiles

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