卵形弹中低速侵彻UR50超早强混凝土靶机理

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摘要为研究早强混凝土的抗侵彻性能和养护龄期的关系，利用35mm弹道炮和35CrMnSiA制缩比卵形弹对两种养护期下产品名为UR50的超早强混凝土进行了侵彻实验，根据实验数据对两种龄期的超早强混凝土的侵彻响应特性进行对比分析。之后为进一步研究弹体侵彻超早强混凝土的响应机理，引入刚性弹侵彻半无限靶的响应模型进行理论研究，并利用别列赞公式分析了超早强混凝土中特种钢纤维对抗侵彻性能的提升。实验结果表明：弹体中低速侵彻超早强混凝土靶的过程可分为冲击开坑和稳定侵彻两个阶段；超早强混凝土养护7天就可以达到养护28天时的抗侵彻性能。利用刚性弹侵彻半无限靶的响应模型对养护7天和28天的超早强混凝土的量纲为一的侵彻深度预测值与实验侵彻深度进行对比，发现其最大相对误差分别为29.13%和17.50%，通过对响应模型中两种龄期超早强混凝土的计算无侧限抗压强度进行修正，使其侵彻深度计算值符合实际结果。

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	宋小东1
	汪维1
	杨建超2
	刘飞2
	高伟亮2

关键词 ： UR50超早强混凝土, 刚性弹, 侵彻, 侵彻深度, 理论模型

Abstract：To study the relationship between the anti-penetration performance of early-strength concrete and the curing age, the 35 mm ballistic gun and 35CrMnSiA reduced-ratio ogive-nose projectiles were used to conduct penetration experiments on the ultra-early-strength concrete named “UR50” under two curing periods. According to the experimental data, the penetration response characteristics of ultra-early-strength concrete at two curing ages were compared and analyzed. In order to further study the response mechanism of projectile penetrating ultra-early strength concrete, the response model of rigid projectile penetrating semi-infinite target is introduced for theoretical research, and the improvement of the penetration resistance of special steel fiber in ultra-early strength concrete is analyzed by using the Berezan formula. The experimental results show that the process of projectile penetrating ultra-early strength concrete target at low speed can be divided into two stages: impact cratering and stable penetration. The ultra-early-strength concrete can achieve the anti-penetration performance of 28 days after curing for 7 days. The response model of rigid projectile penetrating semi-infinite target was used to compare the predicted penetration depth with the experimental penetration depth of ultra-early-strength concrete with one dimension for 7 days and 28 days, and it was found that the maximum relative errors were 29.13 % and 8.48 %, respectively. The calculated unconfined compressive strength of ultra-early-strength concrete at two ages in the response model was corrected to make the calculated penetration depth conform to the actual results.

Key words： UR50 ultra-early-strength concrete rigid projectile penetration penetration depth theoretical model

收稿日期: 2022-03-03 出版日期: 2023-03-28

引用本文:

宋小东1，汪维1，杨建超2，刘飞2，高伟亮2. 卵形弹中低速侵彻UR50超早强混凝土靶机理[J]. 振动与冲击, 2023, 42(6): 8-15.
SONG Xiaodong1，WANG Wei1，YANG Jianchao2，LIU Fei2，GAO Weiliang2. Mechanism of ogive-nose projectiles penetrating a UR50 ultra-early-strength concrete target at middle and low speed. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(6): 8-15.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2023/V42/I6/8

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