基于体积填充法的弹体侵爆一体毁伤效应研究

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (12) : 194-204.

论文

李述涛，魏万里，陈叶青，陈龙明

作者信息 +

A study on damage effect of projectile penetration and explosion integration based on a volume filling method

LI Shutao,WEI Wanli,CHEN Yeqing,CHEN Longming

Author information +

文章历史 +

摘要

弹体侵爆一体试验很难区分侵彻和爆炸两种荷载的毁伤权重，目前亦未有较成熟的方法模拟弹体侵彻动爆一体的全过程。针对此问题提出一种基于体积填充法的弹体侵爆一体数值模拟方法，在背景网格（ALE）中通过体积填充生成炸药材料，同时赋予其与弹壳相同的初始速度，设置流固耦合算法约束弹壳与炸药协同变形和运动，同步侵彻目标介质后静态或动态起爆炸药。利用经验公式对惰性弹侵彻过程进行了模型验证，完成了侵彻静爆一体和侵彻动爆一体全过程数值模拟，给出混凝土介质内部压力场、表面成坑和成坑深度的变化规律，量化分析了侵爆一体过程中侵彻和爆炸两种荷载的毁伤权重。结果表明：侵彻静爆一体时，目标介质内未消散的侵彻波场会与爆炸冲击波场叠加，其压力峰值较侵彻后装药静爆的单一爆炸波场有所提高，但不明显；侵彻动爆一体时，炸药的动爆效应使得介质内爆炸冲击波场呈现出不规则的球形分布，速度方向峰值压力提高20%以上，在固定着靶速度的情况下，起爆时间越晚，表面成坑越小，成坑深度越大；在固定起爆深度的情况下，着靶速度越大，表面成坑越小，成坑深度越大。

Abstract

It is difficult to distinguish the damage weights of penetration and explosion loads in the test of projectile penetration and explosion integration, at present, there is no mature method to simulate the whole process of projectile penetration and dynamic explosion integration. To solve this problem, a numerical simulation method of projectile penetration and explosion integration based on volume filling method is proposed, the explosive material is generated by volume filling in the background grid (ALE), and given the same initial velocity as the shell. The fluid structure coupling algorithm is set to restrict the cooperative deformation and movement of the shell and the explosive, and the static or dynamic explosive is charged after penetrating the target medium synchronously. The empirical formula is used to verify the model of inert projectile penetration process, and the numerical simulation of the whole process of penetration and dynamic explosion integration and penetration and static explosion integration is completed. The variation laws of medium internal pressure field, surface cratering and cratering depth are given, and the damage weights of penetration and explosion loads in the process of penetration and explosion integration are quantitatively analyzed. The results show that: when the penetration and dynamic explosion integration, the non dissipated penetration wave field in the target medium will be superimposed with the explosion shock wave field, and the pressure peak is higher than that of the single explosion wave field of charge static explosion after penetration, but it is not obvious; When the penetration and dynamic explosion integration, the dynamic explosive effect of the explosive makes the explosion shock wave field in the medium present an irregular spherical distribution, which has an influence that can not be ignored. When the target velocity is fixed, the later the initiation time is, the smaller the surface crater is and the greater the crater depth is; In the case of fixed initiation depth, the greater the target velocity, the smaller the surface crater and the greater the crater depth.

导出引用

李述涛，魏万里，陈叶青，陈龙明. 基于体积填充法的弹体侵爆一体毁伤效应研究[J]. 振动与冲击, 2023, 42(12): 194-204

LI Shutao,WEI Wanli,CHEN Yeqing,CHEN Longming. A study on damage effect of projectile penetration and explosion integration based on a volume filling method[J]. Journal of Vibration and Shock, 2023, 42(12): 194-204

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